washing powder

Latest update date: November 6, 2023

Washing Powder

Alkaline synthetic detergent

Washing powder is an alkaline synthetic detergent, a chemical preparation used for washing clothes. Washing powder is usually also called powder laundry detergent or laundry powder.

The main ingredients of washing powder are anionic surfactant, sodium alkylbenzene sulfonate, a small amount of nonionic surfactant, plus some auxiliaries, phosphates, silicates, fluorescein, fluorescent agents, enzymes, etc., after mixing, powder spraying and other processes, most of them now use 4A fluorspar instead of phosphate. Laundry powder refers to powdered (granular) synthetic detergent.

1. What is a biological washing powder?

Biological washing powder does not have a high degree of specificity. Biological laundry detergent is a type of laundry detergent with enzymes added, which has more components than ordinary washing powder. At present, there are four commonly used enzyme preparations: protease, lipase, amylase, and cellulase. Among them, alkaline protease and alkaline lipase are the most widely used and have the best cleaning effect. Proteases can hydrolyze large molecule proteins in stains such as blood and milk stains into soluble amino acids or small molecule peptides, making them easy to detach from clothing; Lipase can hydrolyze large molecule fats in oil stains into small molecule substances; Amylase can hydrolyze large molecules of starch into small molecules; Cellulase can hydrolyze cellulose into small molecule substances. Enzymatic laundry detergent has stronger decontamination ability than ordinary laundry detergent due to the presence of enzymes, but enzymes have higher environmental requirements. Temperature, pH, and surfactants can all affect the decontamination effect of enzymatic washing powder.

To make your own washing powder at home, you need 1200 grams of soap and 600 grams of soda ash. Then pour the soap into a stainless steel basin and add an appropriate amount of water. The main purpose of adding water is to melt the soap, and not too much water. Melt all the broken soap and let it cool for a while. Then pour 600 grams of edible soda ash and stir evenly. After the soda ash and soap are bonded together, air them in a mesh bag or flat for one to two months. If the sunlight is good, one month is enough. Depending on the degree of dryness during the air drying process, the soap should be regularly broken and not stuck together. Wait until the soap is completely dry, and then you can pack the formed washing powder. There are also clumps that need to be ground into powder, like purchased laundry detergent bags, which are not conducive to dissolution in water when clumped together.

Washing powder contains certain chemical substances, which may cause skin allergies for a small number of people. These people should try to avoid direct contact with washing powder and wear gloves when washing clothes to reduce skin irritation. Avoid scratching with your hands to avoid skin damage and infection.

The main symptoms of powder detergent allergy are inflammatory lesions on the skin. Powder detergent allergy generally causes local skin redness, swelling, itching, and the formation of rashes. In severe cases, it can cause local burning sensation and peeling. People who are allergic to powder detergent are related to their own allergic constitution, and it is necessary to clarify the severity of the allergy. Mild allergic individuals can apply anti allergic ointment and take anti histamine drugs internally for conditioning. Avoid secondary contact with powder detergent during treatment.

Not necessarily. Many companies or individuals use the word 'best' to do search engine optimization work. Their data source is uncertain and there is even suspicion of fraud. For example, when we search for the best washing powder manufacturers, there will be many related results with "best", many of which are artificial content.


1. Spanish: detergente en polvo
2. French: poudre détergente
3. German: Waschpulver
4. Italian: detersivo in polvere
5. Portuguese: detergente em pó
6. Dutch: wasmiddelpoeder
7. Russian: моющий порошок (mooyushchiy poroshok)
8. Chinese (Simplified): 洗衣粉 (xǐyīfěn)
9. Japanese: 洗剤パウダー (senzai paudā)
10. Korean: 세제 가루 (seje garu)
11. Arabic: مسحوق المنظفات (mus'hawq al-munadhafat)
12. Hindi:डिटर्जेंट पाउडर (detergent paudar)

Basic definition of washing powder

Synthetic detergents use surfactants as the main ingredients and are equipped with appropriate amounts of builders with different functions. Laundry powder refers to powdered (granular) synthetic detergent.

After the 1940s, with the development of the chemical industry, people used sodium tetrapolypropylene benzene sulfonate, a chemical substance extracted from petroleum, to create detergents with better performance than soap. Later, people added phosphates, which can soften hard water and improve the decontamination effect of detergents, into detergents, so that the detergent's performance would be even more perfect. For the convenience of use, carrying, storage, transportation, etc., people make detergents into washing powder.

Since washing powder can show good decontamination effects in various water types such as well water, river water, tap water, spring water, and even sea water, and is widely used on various types of fabrics, its production and use have developed rapidly. Nowadays, laundry detergent is a necessary cleaning product for almost every household.

Main ingredient of washing powder


There are five major categories of ingredients in laundry detergent: active ingredients, detergent ingredients, buffer ingredients, synergistic ingredients, dispersant LBD-1, and auxiliary ingredients.

The main ingredients are: fabric fiber anti-scaling agent, anionic surfactant, nonionic surfactant, water softener, dirt suspending agent, enzyme, fluorescent agent and spices, etc.; poor washing powder often contains phosphorus, aluminum, alkali, etc. Harmful ingredients. The function of surfactant in washing powder is to make the washing powder soluble, emulsified, soaked, cleansed, sterilized, softened, foamed, and prevented from static electricity on clothes.

active ingredients

Active ingredients are the ingredients that play the main role in detergents. The active ingredient in washing is a type of substance called surfactant. Its function is to weaken the adhesion between stains and clothes. Under the action of washing water flow and mechanical force such as hand rubbing or agitation of the washing machine, the stains are separated from the clothes, thereby removing the stains from the clothes. To achieve the purpose of washing clothes.


1. To achieve a good stain removal effect, the laundry detergent should contain enough active ingredients. In order to ensure the washing effect of washing powder, the national competent authorities have stipulated the minimum content of active ingredients in washing powder. Depending on the type of active agent used and the category of the product, the amount of active ingredients in laundry detergent should generally not be less than 13%;

2. Because many surfactants have strong foaming ability, consumers can judge the quality of washing powder based on experience and how it foams after being dissolved in water;

3.However, the foaming ability of some washing powders specially designed for drum washing machines is much worse than ordinary washing powders. This is because the drum washing machine mainly relies on the mechanical force generated by the tumbling of clothes in the drum to achieve the purpose of washing clothes; too much foam in the washing solution will greatly weaken the mechanical force generated by the tumbling of clothes. The cleaning effect is greatly reduced.

builder ingredients

Detergent builders are the largest component in laundry detergent, generally accounting for 15%-40% of the total composition. The main function of the builder is to soften the water by binding the hardness ions contained in the water, thereby protecting the surfactant to maximize its effectiveness. The so-called phosphorus-containing and phosphorus-free detergents actually refer to whether the builder used is phosphorus or non-phosphorus.


1. Some provinces and cities have enacted local regulations prohibiting or restricting the sale and use of phosphate- containing detergents.

2. Among non-phosphorus detergent builders, a substance called zeolite is recognized by the industry as a good substitute for phosphate components.

3.In addition, there are a variety of "cheap" phosphorus-free builders, such as sodium carbonate (soda ash), sodium silicate (water glass) and their complexes in various proportions. Since these phosphorus-free additives eventually form water-insoluble precipitates, if they cannot be effectively suspended in the water, they will sink on the clothes. The result of long-term use of this phosphorus-free detergent will be hardening and yellowing of the clothes. To prevent this from happening, well-designed phosphorus-free detergents must use effective dispersants in the formulation so that the insoluble particles formed do not settle on the clothing.

Buffering ingredient

Common dirt on clothing is generally organic stains, such as sweat stains, food, dust, etc. Organic stains are generally acidic, so making the washing solution in an alkaline state is conducive to the removal of such stains, so a considerable amount of alkaline substances are added to washing powder. Generally used are soda ash and water glass.


1. Although alkalinity is good for washing clothes, excessive alkaline substances can cause damage to clothes and skin. Therefore, the state has made corresponding regulations on the alkalinity of washing powder. Qualified washing powder should meet these requirements.

2. In addition, as mentioned earlier, these alkaline substances will form precipitates with hard water, and too much alkaline substances will cause a large amount of precipitates to form during washing, which will worsen the washing effect.

Synergistic ingredients

In order to make detergents have better and more washing-related functions, more and more detergents contain special functional ingredients, which can effectively enhance and improve the washing performance of detergents.

According to functional requirements, the synergistic ingredients used in detergents fall into the following categories: those that improve the cleaning effect, such as enzyme preparations ( protease, lipase, amylase, etc. ), bleaching agents, bleach accelerators, etc.; those that improve whiteness maintenance., such as anti-redeposition agent, dirt dispersant LBD-1, enzyme preparation ( cellulase ), fluorescent whitening agent, anti-stain agent ; protecting fabrics and improving fabric feel, such as softeners, cellulase, antistatic agents, Color protectant, etc.

Note: In fact, many brands of detergents use similar main ingredients, and the secret of each product often lies in these synergistic ingredients. The use of various enzyme preparations can greatly enhance the detergent's ability to clean special and difficult-to-wash stains, such as blood stains, sweat stains, food oil stains, vegetable and fruit stains, etc.; bleach can decompose and remove pigment stains; anti-renew The depositing agent ensures that clothes will not turn gray or yellow after multiple washes.

Auxiliary ingredients

Such ingredients generally do not improve the washing ability of detergents, but they play a greater role in the processing of the product and the sensory indicators of the product, such as making the washing powder white in color, with uniform particles, no agglomeration, and pleasant aroma, etc.

Washing powder production programs

Raw material preparation

Collect the required raw materials, including the main components of laundry powder, such as alkaline substances (such as sodium sulfate), surfactants, filling agents, whitening agents, spices, etc. Make sure the quality and purity of raw materials meet production requirements.

Formula design

According to the product formula, determine the proportion and ratio of each raw material. This step can be adjusted according to the formula provided by the R & D department or according to market demand.

Mixing raw materials

Put the prepared raw materials in the mixed machine according to the formula ratio. The time and speed of the mixed need to be adjusted according to the requirements of the production line equipment and formula to ensure that the mixing is uniform.

Powder preparation

Send the mixed raw material into a particle machine or granulator, and prepare granular laundry powder by pressing or spraying.


Send the granular laundry powder into the dryer for drying to remove the moisture. Dry temperature and time need to be controlled according to product requirements to ensure the quality and stability of laundry powder.

Screening and packaging

Siebit the dry laundry powder to remove excessive or too small particles to ensure the uniformity of the product. Then put the laundry powder into the packaging machine and automatically packaged, usually put the laundry powder into a plastic bag, carton or other packaging materials.

Packaging inspection

For appearance inspection and quality inspection of the packaged laundry powder to ensure that the packaging is intact, and the product meets the quality standards.

Finished product storage

Storage of laundry powder products that meet the quality requirements to the warehouse and wait for shipments or delivery.

washing powder production programs
washing powder production programs
washing powder production programs

Washing powder brands

Ariel: It is a brand owned by P&G. It provides a variety of different types of laundry powder, such as ordinary laundry powder, high-efficiency laundry powder and professional series.

Tide: This is a PROCTER & Gamble brand, which offers laundry powder and laundry. TIDE is known for its efficient and powerful decontamination characteristics.

Persil: It is Henkel's brand that provides various laundry powder and laundry liquids, which is loved by consumers with its excellent cleaning power and pollution ability.

OMO: It is the brand of Unilever, which is widely popular globally. OMO provides a variety of products, including laundry powder, laundry fluid and laundry soap.

Gain: This is the brand of Procter & Gamble, which is mainly sold in the North American market. Gain has been well received with its unique aroma and clean effect.

Surf Excel: This is the brand launched by Unilever in the Asian market. It offers various laundry powder and laundry fluids, known for its excellent clean ability.

FAB: This is the brand of Jackson Wood, which offers a variety of laundry powder and laundry liquid, which is loved by consumers with its efficient cleaning capabilities and economics.

Washing powder prices

Ordinary laundry powder: The general price is between a few yuan and a dozen yuan (or equivalent to other currencies), and the specific price depends on the brand and packaging specifications.

Efficient laundry powder: These products usually have stronger decontamination capabilities and special washing functions, so the price is relatively high. The price range is usually between a dozen and tens of yuan (or equivalent to other currencies).

High-end laundry powder: The price of laundry powder in some high-end brands or professional fields may be higher, especially those professional laundry powder facing specific industries (such as hotels, hospitals, etc.). The price may be between tens of yuan and hundreds of yuan (or equivalent to other currencies).

Washing powder manufacturers

P&G: P&G is the world's leading consumer goods company with multiple laundry powder brands, such as Ariel, Tide, and Gain.

Unilever: Unilever is another world-renowned consumer goods company and an important manufacturer in the field of laundry powder production. Their brands include OMO, Surf Excel, and Rin.

Henkel: It is a German chemical and consumer company, and its brand Persil enjoys a high reputation in the laundry powder market. They also produce other detergent products.

Ariel Corporation: It is a manufacturer of the laundry powder brand Ariel, focusing on providing high-quality laundry powder products.

Wigo Group: Wigo Group is a professional cosmetics and detergent manufacturer, producing multiple laundry powder brands, such as FAB and Dalli.

MEFFERT AG: It is a well-known chemical manufacturing company in Germany. Its brands include CORAL and TANDIL.

China National Washing Powder Factory: It is a well-known laundry powder brand in China, produced by China Energy and Chemical Group Corporation.

SHANGHAI HUTONG Chemical Co., LTD.: It is a company specializing in the production of laundry powder and detergent products. Its brands include Hengtian, Hua Dao, Ou Le B, etc.

Aogrand Group: It is a comprehensive daily supplies manufacturer in China. The company's main products include laundry powder, laundry liquid, mosquito coils, pesticides and other products. The main brands of the company's laundry powder include Cleace and Joby.

Hengan Group: Hengan Group is a large textile company in China. It also produces laundry powder and detergent products, known for its quality stability and reliability.

Jinfang Group: It is a comprehensive textile company in China, and its subsidiaries produce washing powder and detergent products.

Hengshun Group: Hengshun Group is a comprehensive enterprise group in China. Its subsidiaries produce clean products such as washing powder and detergent.

Jielieya: Jie Liya is a Chinese laundry powder brand with a variety of product series, including ordinary laundry powder, high-efficiency laundry powder and professional series, and other detergent products.

washing powder manufacturer

Scientific use of washing powder


Washing powder is a type of synthetic detergent and an essential household product. There are currently three main categories of laundry detergent on the market, each with its own characteristics:

1. Ordinary laundry detergent and concentrated laundry detergent

Ordinary washing powder has large and loose particles, dissolves quickly, and has rich foam, but its detergency is relatively weak and is not easy to rinse. It is generally suitable for hand washing; concentrated washing powder has small particles, high density, less foam, but strong detergency. (At least twice that of ordinary washing powder), easy to clean, water-saving, and generally suitable for machine washing.

2. Phosphorus-containing laundry detergent and phosphorus-free laundry detergent

Phosphorus-containing laundry detergents use phosphate as the main additive, and phosphorus elements can easily cause eutrophication of environmental water bodies, thereby destroying water quality and polluting the environment. Phosphate-free laundry detergent does not have this shortcoming and is conducive to water environment protection. For the health of our living environment, it is recommended to use phosphorus-free laundry detergent.

3. Enzyme-added laundry detergent and scented laundry detergent

Enzyme-added laundry detergent means enzymes are added to washing powder, and fragrance-added washing powder means fragrance is added to washing powder. Enzyme-added laundry detergent has special functions in removing specific dirt (such as juice, ink, blood stains, milk stains, gravy, milk, soy sauce stains, etc.). At the same time, some of the specific enzymes can also sterilize, whiten, protect and enhance color. Brilliant and other effects. Fragranced laundry detergent not only satisfies the washing effect, but also makes clothes emit fragrance, making people feel more comfortable.


(1) Look for the “national standard”

Laundry powder is closely related to daily life, but it has certain toxicity. If it invades the human body, it will cause hemolysis, thymus damage, decreased body resistance, diarrhea, weight loss, spleen atrophy, liver cirrhosis, etc. Therefore, only by choosing qualified products can you use them with confidence.

Laundry powder produced according to national standards is usually marked with both numerical and text performance marks on the packaging:

● Numeric model designation indicating performance

The numerical model mark indicates the surfactant content, and the surfactant content is the main determinant of the detergency. For example, type 30 means that the surfactant content is 30%, which is a high-grade washing powder and can wash wool and silk; type 20 means that the surfactant content is 20%, which is a low-grade alkaline washing powder and is suitable for washing linen fabrics. ;There are also type 25, type 28 and so on.

● Text mark indicating performance

It is mainly divided into five categories: (1) high-foaming type (ordinary type), suitable for manual washing; (2) low-foaming type, containing polyether and soap ingredients, high efficiency and less foam, easy to rinse, and is specially used for washing machines ; (3) Bleaching type, containing sodium borate or sodium percarbonate, which has a bleaching effect in hot water above 60°C, suitable for washing white clothes; (4) Enzyme type, containing biological catalysts, which can decompose sweat stains on clothes, milk stains and blood stains, the best effect is when used in 45℃ water; (5) Brightening type, containing fluorescent whitening agent, which can whiten white clothes and brighten colored clothes.

Experts from the State Bureau of Quality Supervision suggest that consumers should look for the "national standard" when purchasing laundry detergent. "National Standard" brands will be marked with the " GB Standard" logo on their packaging. If consumers have no way to determine whether the product uses the "national standard", it is best to choose quality-guaranteed washing powders such as inspection-free products and brand products. First, they must identify the trademarks and pay attention to those products that do not have obvious place names or factory names printed on them. secondly, pay attention to the appearance when selecting, and thirdly, do not buy from unlicensed stalls to avoid being deceived.

(2) Identify the pros and cons

● Distinguish from the packaging of brand-name high-quality laundry detergent packaging bags with clear printing and no misprints and ink contamination ; counterfeit brand-name laundry detergent packaging bags mostly have poor printing quality and have misprints and ink contamination.

● The appearance of high-quality brand-name washing powders can be distinguished as hollow granules similar to millet grains, which are fluffy and full when bagged, and have a slippery feel when touching the bag. The colors are pure and the particles are evenly distributed. Fake and shoddy washing powders are mixed with coarse particles or hard agglomerates. The bag is not full after being bagged, the bag has a large gap, the bag feels sluggish when touched by hand, and the pink color is grayish-yellow. If the color of the added enzyme is gray-blue, the enzyme activity has expired or is other dyed substances.

● High-quality washing powder dissolves quickly in water, does not feel burning when touched, the solution is clear and smooth, has a large amount of foaming, has obvious detergency, and has obvious cleaning effect with a small amount, and the smell is not pungent. Fake and inferior washing powder dissolves slowly in water, the aqueous solution is turbid, there is sediment on the bottom of the basin, and the solution feels burning when touched. The amount of foam is very small, and the detergency is poor. After adding a large amount, its washing efficiency is still very low, and the smell is unpleasant. Pungent alkaline smell.

cleace washing powder

Usage of washing powder

Correct use of laundry detergent can improve the effectiveness of laundry detergent, maximize the role of laundry detergent, and save water. Before use, you should check the packaging to find out the type of washing powder and use it correctly according to the instructions on the packaging bag. Generally speaking, washing powder should be dissolved in warm water first. Then soak the soaked clothes in it, and the washing effect will be best after 15 to 20 minutes. Special attention should be paid to the fact that the temperature of water used in enzyme-added washing powder cannot exceed 60°C, otherwise the enzyme will be inactivated (ineffective), thus affecting the washing effect.

Storage of washing powder

When storing washing powder, pay attention to moisture and sun protection, and place it in a cool and dry place. Especially for laundry detergents with enzymes and fragrances, if the temperature is too high, the fragrance will evaporate and the enzymes will lose activity.

Note on usage

Laundry powder that has been dissolved in water can be absorbed into the human body through the skin. Long-term accumulation can easily damage liver function and even cause cancer.

Laundry powder is an alkaline chemical detergent synthesized from sodium alkyl benzene sulfonate, sodium sulfate, sodium myceliodate, sodium tripolyphosphate and carboxymethyl fiber. Frequent contact with washing powder (water) can easily cause skin keratinization and cracking ; washing your hair with washing powder will make your hair yellow and brittle; entering the human hematopoietic system will affect liver function.

Enzyme-added laundry detergent contains alkaline protease to hydrolyze proteins on clothes and remove dirt and scale. This alkaline protease can also decompose skin surface proteins, causing people to suffer from allergic dermatitis, eczema, etc.

Clothes and quilts washed with laundry detergent need to be rinsed thoroughly with clean water; baby diapers, underwear, underwear, and adult underwear should not be washed with laundry detergent (but soap or natural soap powder can be used); cooking utensils, dishes, and chopsticks should not be washed either. Use laundry detergent. Personnel who have been exposed to washing powder for a long time should take necessary protection and try not to come into direct contact with washing powder.


Washing powder can only be used to wash clothes

In life, many people do use washing powder as a "universal cleaner ". In addition to washing clothes, they also use it to wash fruits, vegetables, tableware, scrub furniture and floors, thinking that it has the functions of decontamination, disinfection and sterilization. effect. As everyone knows, this may cause the washing powder to enter the human body. Experts remind that even a very small amount of washing powder entering the body can cause poisoning.

Associate Professor Jiang Zhengyi from the Department of Dermatology, People's Hospital of Wuhan University, said that after long-term direct contact of the skin with alkaline laundry detergent, the weakly acidic environment on the skin surface will be destroyed, and its effect of inhibiting bacterial growth will also disappear, which can easily lead to skin itching and even allergies. Symptoms such as dermatitis or leaving pigmentation on the skin. So never use washing powder to wash your hair or contact the skin for a long time. If you wash clothes by hand, it is best to use soap.

Professor Wei Jie from the Emergency Department of Wuhan University People's Hospital said that they have received many patients who suffered discomfort after accidentally taking washing powder. Most of them suffered from chest pain, nausea, vomiting, diarrhea, blood vomiting and blood in the stool, as well as mouth and throat pain. Animal experiments also show that long-term exposure to large doses of laundry detergent can cause damage to liver and nerve function and cause cancer.

Do not mix laundry detergent with disinfectant

After SARS, many housewives like to add some disinfectant when washing clothes with laundry detergent. But this kind of laundry method may greatly reduce the effectiveness of cleaning and disinfection.

The ingredients of laundry detergent are different, including anionic, cationic or nonionic, and the same is true for disinfectant. If washing powder and disinfectant are used together, a neutral reaction will easily occur, and the efficacy of each will be weakened.

Professor Gong Zuojiong from the Department of Infectious Diseases, People's Hospital of Wuhan University said that most disinfectants are used to eliminate pathogenic microbial contamination, except under special conditions, such as when someone in the family suffers from pink eye, diarrhea, onychomycosis, scalp ringworm, etc., or women during menstruation, puerperium and infants Period, otherwise, there is absolutely no need to use disinfectant to wash clothes. Because people themselves have a certain degree of resistance, a small amount of non-pathogenic microorganisms will not pose a threat to health. After washing and drying clothes and exposing them to sufficient sunlight, the bacteria remaining on the clothes will self-destruct after a certain period of time. perish. Frequent use of disinfectants not only reduces the body's own resistance, but also easily causes liver damage.

Laundry powder, the simpler the function, the better

Many washing powders on the market now have some new ingredients added to them to have more and stronger washing functions. These ingredients mainly include surfactants, builders, stabilizers, whitening agents, flavors and enzymes, etc., to achieve the purpose of being easily soluble, cleansing, softening, foaming, and preventing static electricity on clothes. But there are too many substances added to washing powder, which is not a good thing for our health.

Studies have shown that commonly used detergents can cause damage to the human liver; surfactants have long been found to damage the stratum corneum of the skin, causing rough skin, and are now considered a major environmental hazard ; powerful laundry detergents are In addition to absorbing water, the alkaline substances contained in it can also damage human cell membranes and denature tissue proteins ; there are too many synthetic flavors in scented laundry detergents, which have a strong smell and often cause allergies in some people; whitening laundry detergents contain Organic chlorines and fluorescent agents are toxic substances that can easily accumulate in the human body and cause damage to health.

Therefore, when buying laundry detergent, try to choose one with simple functions, few added ingredients, and light smell. From an environmental perspective, it is best to choose phosphorus-free laundry detergent that causes little water pollution.

Some relevant information on whether synthetic laundry detergent is toxic or harmful

1. The discussion about whether washing powder causes cancer and whether it is toxic is not the same as today when the concept of environmental protection is popular. It has happened many times in history. For this reason, in 1945, the United States conducted an oral test on 6 healthy male prisoners. The daily oral dosage of sodium alkylbenzene sulfonate was 100 mg for 120 days. Medical observation confirmed the hemoglobin amount, blood cell count, kidney function, intestinal function, etc. There was no change in the tract absorption function.

2. In 1960, oncology experts Dr. Spiker and Dr. Tu Sen of the University of Chicago conducted long-term animal skin application and oral tests of washing powder, confirming that washing powder has no carcinogenic or teratogenic effects.

3. In 1963, Germany repeated the above-mentioned experiment by American scientists and reached the same conclusion.

4. In the 1960s, Professor Miki Mikami of Toyo Mie University raised the question of the teratogenic effects of washing powder. The Japanese government commissioned a joint test by Nagoya University, Mie University, Hiroshima University, and Kyoto University. After eight months, it was finally confirmed that alkyl Sodium benzenesulfonate has no teratogenic effects on the fetus.

5. Later, the Medical College of the University of Tokyo conducted a survey on multiple indicators of liver function among 279 workers and employees of two washing powder factories who had been engaged in washing powder production for 10 to 20 years. All test items were normal.

6. In April 1973, the International Health Organization held an international symposium in Switzerland and made a formal conclusion that washing powder (including formulas containing fluorescent whitening agents) does not cause cancer or teratogenesis.

Reference materials: Light Industry Press "Household Detergents", "Synthetic Detergents"

Use different laundry detergents for different stains

Some people feel distressed when they see blood stains, oil stains, paint, and other stains on their clothes that are difficult to clean. In fact, according to different stains, we only need to choose washing powder with different enzymes added. For protein- containing stains such as meat stains and blood stains, use washing powder with added protease to remove stains; for noodles, mashed potatoes and other starch-containing stains, use washing powder with added amylase to remove stains; for oil stains, etc. The stains can be eliminated using lipase. Cellulase can remove fiber protrusions on the surface of sweaters and other textiles, making the clothes look brand new.

Related questions

When doing laundry, do you put the clothes first and then the water and washing powder?

Many people are used to storing dirty clothes in the washing machine, and then adding water and washing powder when washing. In fact, when cleaning the laundry, you should put the washing powder first. Since it is a powdery substance, it is not easy to dissolve. It should be dissolved with water before it can exert its effect better, so as to avoid being rinsed completely and causing residue. The correct method is: first dissolve the washing powder in water, then put in the clothes to be washed, soak for ten minutes before washing.

Is the higher the water temperature the better when washing clothes? (No)

The water temperature for washing clothes is not as hot as possible. Various enzyme-containing laundry detergents are commonly used, among which the enzyme preparations mainly include alkaline protease and alkaline lipase.

Alkaline protease is used to break down protein stains, such as sweat stains, blood stains, etc. Alkaline lipase mainly acts on fatty acid and its ester dirt, which is usually referred to as oil dirt. The activity of the two enzymes is related to temperature, with approximately 40°C being the most suitable. Temperatures that are too high or too low will reduce enzyme activity.

Secondly, proteins have denaturing effect. Its distinctive feature is that the protein coagulates and its solubility is significantly reduced. An example of this is the coagulation of eggs after being cooked. One of the conditions that causes denaturation is high temperature. The same goes for protein stains on clothing. Therefore, if the water temperature is too high during laundry, they will denature and solidify on the fabric fibers, making it more difficult to wash.

Is it important to leave some foam after washing clothes? (No)

Today's washing products seem to be very "efficient" and they are used as little as possible, but every time the clothes are washed, there is always a lot of foam left on the wall of the drum of the washing machine. Or when washing clothes by hand, after rinsing five or six times, there are still many "little bubbles" stubbornly left on the water. Does it matter? Relevant experts pointed out that it does not matter if a small amount of foam remains, it should be within a safe range. When the amount of washing powder is roughly appropriate, the normal washing program set by the fully automatic washing machine can completely rinse the clothes. If you wash them by hand, rinse them thoroughly two or three times. Consumers can choose high-foaming and low-foaming detergents according to their own habits. No matter which laundry product is chosen, it should be based on the user's own feeling that it can wash well, is convenient, and easy to rinse. In other words, it only needs to be comfortable for the user's habits and feeling.

Does washing powder have no expiration date? (No)

Laundry powder cannot be used indefinitely. Ordinary washing powder can generally be stored for two or more years under specified storage conditions. However, some washing powders with special ingredients have a service life of less than two years.

How to get the best washing results?

1. In areas with hard water (meaning that the concentration of calcium and magnesium ions in the water is high), the amount of washing powder can be increased appropriately or the boiling and dispersing agent LBD-1 can be added to boil the excess calcium and magnesium ions in the tap water to soften it.

2. Wait until the washing powder is fully dissolved before soaking the clothes. Otherwise, a large amount of washing powder may be concentrated on the clothes and burn the clothes when dissolving.

3. Ordinary laundry detergent has better washing effect after soaking in warm water because it contains low-temperature quick-cleaning and brightening enzymes and a comprehensive range of decontamination factors.

cloth washing

Misunderstandings in use

1: The more foam, the stronger the decontamination power.

Some consumers mistakenly believe that the more foam the detergent has, the better. In fact, the amount of foam is not directly related to the detergency. When washing clothes, the amount of washing powder should be added enough. When washing particularly dirty clothes, it is appropriate to add more washing powder, but it is not that the more washing powder the better. [1] When the washing powder reaches a certain concentration and the surface activity of the aqueous solution reaches the maximum value, the detergency will no longer increase with the increase of washing powder, but will tend to decrease. Practice has proven that when the concentration of washing powder is 0.2% to 0.5%, the aqueous solution has the highest surface activity and the strongest cleaning and decontamination ability. That is to say, add 5 to 10 grams (about 1 teaspoon) of laundry detergent to a basin of clean water. Powder is enough. Adding too much washing powder will not only increase the decontamination effect, but will also damage the clothing fibers due to the increase in alkalinity in the solution. In addition, a large amount of washing powder is attached to the clothes, which creates a lot of foam and is not easy to rinse. It consumes water and time, causing waste. The ingredients remaining on the clothes can also cause damage to the skin and cause allergic reactions.

2. Natural soap powder = laundry detergent

There is currently a product called natural soap powder on the market, and many consumers think it is also a kind of washing powder. In fact, soap powder is not exactly the same as washing powder. From a functional point of view, natural soap powder is better than laundry detergent. It does not contain phosphates and has natural properties, so it is less irritating to the skin, safe, and protects fabrics. It has affinity for fabrics. Clothes are fluffy and soft after washing, which solves the problem of fabric dirt accumulation after multiple washings with synthetic laundry detergent., fabric hardening, static electricity and other problems. Soap powder is an ultra-low-foaming washing product that is easier to rinse, so it is more suitable for washing close-fitting clothing. Because natural soap powder is added with a special calcium soap dispersant, its detergency is stronger. Plus, the fragrance is strong and lingers on the fabric after it dries.

3: Laundry powder does not hurt your hands

Due to the fierce competition in the laundry detergent market, in order to show the "unique" efficacy of the products, some manufacturers have launched innovative "hand-friendly washing powder", "hand-friendly dishwashing liquid ", etc., aiming to capture more market share. However, these exaggerated claims can easily mislead consumers. Because, in the final analysis, synthetic detergents are chemical products, and they will cause damage to the skin to a greater or lesser extent while removing stains. Prolonged exposure can cause skin problems such as rash, erythema, scaling, and eczema. If too much is absorbed into the body through the skin, it may also damage the body's hematopoietic function, lymphatic system and liver function, and some may even cause cancer.

4: Treat laundry detergent as dishwashing detergent

Some families use washing powder to wash dishes, which is very bad. The main ingredient in laundry detergent is sodium alkyl benzene sulfonate, which is moderately toxic. If its particles attach to tableware and enter the human body through the gastrointestinal tract, they can inhibit the activity of pepsin and pancreatic enzymes, thereby affecting gastrointestinal digestive function. It can also damage liver cells, leading to liver dysfunction, which over time can cause People have diarrhea, indigestion, liver and kidney abnormalities, spleen shrinkage, and even cause cancer and blood diseases. Therefore, never use laundry detergent as dishwashing detergent.

Identification method

Use a standard sieve (<20 mesh and >80 mesh accurate sieve) to identify the particle size of laundry detergent, and the particles should be no less than 75% uniform. In the absence of a standard sieve, we can also use our senses to identify the particle size of washing powder. Good-quality finished washing powder, in addition to being white in color, has uniform and full particles, is dry and strong, can flow freely, and can be about the same size as northern millet grains. On the contrary, if the particles are too fine, they will easily turn into dust and the fluidity will be poor. If the particles are too large, it will affect the solubility of the particles. The diameter of the hollow granular washing powder particles is about 0.5-0.8mm, and the specific gravity is about 0.25-0.45. The particles are uniform and not sticky or agglomerated.

Detergents comparison

The correct use of washing solvents is also very important. We often use washing powder in our daily life, so how much do you know about the performance and cost-effectiveness of washing powder. How to better distribute and use water when washing clothes? How much do you know?

Great PK of detergent performance

Washing powder is alkaline but cost-effective

Laundry powder is an alkaline synthetic detergent with strong detergency, good solubility, and ease of use. It is better in terms of resistance to hard water and rich foam. At the same time, it is cheaper and is a cost-effective laundry detergent.

Laundry powder is more suitable for washing cotton, linen, chemical fiber and blended fabrics, but is not suitable for washing wool, silk and other clothes. Since wool, silk and other clothes contain protein, and washing powder is alkaline, it will damage the clothes. The washing effect of washing powder in warm water is better than that in cold water. It dissolves evenly in warm water and the surfactant can play a greater role. The appropriate water temperature is 30 to 60°C.

There are more and more types of laundry detergents with different properties. There is currently an enzyme-added laundry detergent that adds an alkaline protease biocatalyst, which can "digest" stubborn protein dirt, such as blood stains, milk stains, grass stains, etc., and can also remove odors. Enzyme is a heat-sensitive substance, and temperature is an important factor affecting enzyme activity. Therefore, when using enzyme-added laundry detergent, the washing water temperature should be controlled at around 40°C. Do not soak laundry detergent in water above 60°C to prevent the enzyme preparation from losing activity and affecting the decontamination effect. Enzyme-added laundry detergent cannot be used to wash fabrics containing protein fibers such as wool and silk, because enzymes can destroy the protein fiber structure.

Soap is natural but tends to clog clothes

The main component of soap is sodium fatty acid, which is generated from natural oils through saponification reaction. It has strong detergency and good biodegradability. It has no toxic side effects on the human body and no pollution to the environment; however, it mixes with calcium and magnesium in hard water. The replacement reaction of ions will form soap scum, which adheres to the clothes, causing the clothes to be washed to harden, and forming dirt on the washing utensils.

Laundry detergent with strong detergency and slightly higher price

Laundry detergent is a liquid laundry detergent with ingredients similar to washing powder. It is suitable for washing heavy-duty fabrics such as underwear, bedding and sheets. It has good water solubility and can be quickly dissolved in cold water to fully exert its effect. Low-foaming non-ionic surfactants are often added to laundry detergents, making them easier to rinse. Compared with washing powder, laundry detergent has lower alkalinity, milder performance, does not damage clothes, and is more convenient to use. Laundry detergents generally use non-ionic surfactants that are resistant to hard water and are effective in both soft and hard water; because they can be made into Chemical laundry detergents (such as silk and wool laundry detergents) have low alkalinity, so they can be used to wash silk, wool and other delicate fabrics, and the washed clothes will be less irritating to the skin. The price of laundry detergent is much more expensive than laundry detergent.

Soap powder, soft and suitable for underwear

The surfactants in ordinary laundry detergents are generally synthesized from petroleum as raw materials, while the main surfactants in soap powder are simply saponified from natural oils. Due to the different main surfactants, the characteristics of the product also vary. make a big difference. Compared with laundry detergent, laundry soap powder usually has the advantages of better softening effect, effectively reducing clothing damage, less foam during washing, and easy rinsing. Soap powder has low water requirements and still shows excellent washing performance even in low temperature and high hardness water. Soap powder is more suitable for hand washing of underwear, infant clothes, diapers, etc.

Color bleach enhances color and can also sterilize

The color bleaching liquid contains certain chemical bleaching agents or optical bleaching agents. Bleach mainly targets organic pigment stains (such as blood stains, tea stains, etc.) and some protein stains (such as urine stains, sweat stains, etc.). Its mechanism of action is to release atomic oxygen through chemical reactions to remove stains from the clothes or themselves. Various pigments formed by yellowing are oxidized into colorless substances, thereby restoring the original bright color of the clothes.

Color bleaching liquid can enhance the decontamination effect on collars and cuffs, keeping clothes brightly colored. In addition, soaking towels in warm water of no less than 40°C and combining washing powder with liquid detergent for 10 to 20 minutes can achieve a good sterilization effect, keep the towels bright and soft, and extend the service life.

Best washing powders

The following best washing powder informations comes from Amazon's best selling products.

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Arm & Hammer Powder Laundry Detergent

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