Is there any residue in dishwashing liquid?

Is there any residue in dishwashing liquid? Detergent is an indispensable cleaning product for people to use for three meals a day. When it comes to greasy cups and dishes, , it is difficult to clean with just water, but dish soap can help you clean greasy dishes. Are there any dishwashing liquid residues shared below? Is there any dishwashing liquid residue? 1

Is there any dishwashing liquid residue? Does dish soap residue really cause cancer?

It is no exaggeration to say that dishwashing liquid is used by every household. Especially for the oil stains on tableware, the effect of dishwashing liquid is very good. This is because dishwashing liquid Containing surfactants and emulsifiers, it can dissolve and emulsify oil stains to achieve the purpose of cleaning, which is why dish soap is so popular.

However, many people feel that long-term use of dishwashing liquid is likely to result in residual dishwashing liquid. The residual dishwashing liquid is filled with our tableware and may be ingested into the body the next time we eat. inside.

After all, dishwashing liquid is made of chemicals. Eating these chemicals into the stomach will not only harm the body, but over time, it may also cause cancer. In the eyes of many people, cleaning Jing, it’s best not to use it.

So, does dish soap really cause cancer?

Actually not, because the main ingredient in dishwashing liquid is anionic surfactant, which does not cause cancer. Even if there is a small amount of dishwashing liquid residue on the tableware after washing it, it will not cause cancer. The amount is actually very small. Even if you swallow such a small amount, it will not have any impact on the body. Some people believe that the bubbles produced by dishwashing liquid may damage the body through the skin. This statement has no scientific basis. .

Having said that, many people still have psychological shadows about the residue of dishwashing liquid. What I want to tell you here is that we can reduce the amount of residue through some methods. According to GB14934-1994 National Standards stipulate that the residual amount of detergent should be less than 0.1 mg/cm. Generally speaking, as long as the tableware is washed twice, the residual amount of detergent can reach the national standard, so when washing dishes with dish soap When cleaning, be sure to wash it first and then rinse it with water.

It can be seen that dishwashing liquid does not cause cancer, so you can use it with confidence. However, when choosing dishwashing liquid, we must also pay attention to not choosing three-no products. When choosing dishwashing liquid, When using dishwashing liquid, you can choose a big brand, which is more secure. When using dishwashing liquid, the larger the amount, the better. In fact, if you squeeze a little out and dilute it with water, the effect will be better. Does dishwashing liquid leave behind 2

Will washing dishes with dishwashing liquid leave harmful substances behind?

Surfactants are the key to detergent removal.

If you look carefully at the main ingredients of dish soap, you will find an ingredient called "surfactant". The reason why dish soap can remove oil stains is inseparable from the help of surfactants.

Surfactant is an organic molecule with a special structure of one end being hydrophilic and one end being lipophilic, making it both soluble in water and able to break down oil stains.

Specifically, the decontamination principle of dishwashing liquid is to rely on surfactants to dissolve, emulsify, disperse, and suspend the dirt in the water medium, and then rinse the dirt from the tableware surface through clean water. Separate it to achieve the effect of cleaning tableware.

Of course, in addition to surfactants, dishwashing liquids also contain other ingredients, such as water, additives, flavors, etc. Some dishwashing liquids also contain sterilizing and disinfecting ingredients, which can remove some harmful to the human body. microorganism.

Are there any problems with the dishwashing liquids on the market?

Regarding dish soaps on the market and in restaurants, according to the results of random inspections by national and local supervision departments in recent years, it has been found that unqualified dish soap products mainly include: total active substance content does not meet the standard; Problems such as excessive bacteria and the presence of preservative formaldehyde.

1. The total active substance content did not meet the standard

In 2016, the Guangdong Provincial Quality Supervision Bureau randomly inspected 64 batches of dishwashing detergents, of which 1 batch of products was unqualified, and the unqualified items were is the total active content.

Total active substances are the key substances in detergents that play a decontamination role.

The national standard "Detergents for hand-washing tableware" (GB 9985-2000) stipulates that the total active content of detergents for hand-washing tableware (referred to as "dishwashing liquid") should be ≥15%. Generally speaking, the higher the total active content, the stronger the detergency.

2. Bacteria exceeded standards

In 2016, the Shanghai Municipal Bureau of Quality and Technical Supervision conducted spot checks on 58 batches of dishwashing detergent products produced and sold locally, and only 1 batch of products was unqualified. , the unqualified item is the total number of colonies.

According to national standards, the total number of bacterial colonies per gram or per milliliter of dishwashing liquid cannot exceed 1,000 units. If the total number of bacterial colonies in the dishwashing liquid exceeds the standard, it will cause secondary bacterial contamination to the tableware.

3. Contains the preservative formaldehyde

Formaldehyde is an industrial chemical. In order to ensure that the dishwashing liquid does not deteriorate easily, some businesses illegally add formaldehyde as a preservative.

Generally speaking, eating a small amount of formaldehyde will not cause acute poisoning, but eating a large amount of formaldehyde can cause severe abdominal pain, vomiting, coma, kidney damage or even death. The main human health concern with formaldehyde is its carcinogenicity. However, the World Health Organization believes that formaldehyde ingested through food does not cause cancer based on available evidence.

Are chemical residues in dish soap harmful to health?

Some surveys have found that frequent use of dishwashing detergents also has the problem of chemical residues, which may directly or indirectly affect human health.

Indeed, some studies have found that dishwashing liquid has potential harm to animals and plants. For example, a certain concentration of dishwashing liquid can inhibit the germination of wheat seeds and the growth of seedlings; long-term intake of large doses of dishwashing liquid can cause damage to male males. Rats produce obvious reproductive toxicity.

However, this is only an animal and plant test. Whether chemical residues in dish soap are also potentially harmful to the human body requires more research evidence to prove.

But no matter what, we should pay attention to this, such as using qualified products produced by regular companies, and using them correctly and reasonably to minimize the health hazards of detergent residues.

Dishwashing liquid can not only wash dishes, but also fruits.

In our impression, dishwashing liquid is used to wash pots and pans. Some friends may find that there are dishwashing liquids on the market that can also wash food, fruits and vegetables.

That’s right. According to the newly implemented national standard "Detergents" (GB 14930, 1-2015) in September this year, detergents are divided into two categories:

Class A products: directly used for cleaning food;

Category B products: Tools, equipment, containers and food packaging materials used for cleaning tableware and contacting food.

In other words, those dishwashing detergents marked "Class A product" on the package can also be used to wash vegetables and fruits.

In fact, the cleaning principles of these two types of products are the same. However, Type B products mainly remove oily dirt, while Type A products emphasize the removal of residual pesticides. In addition, Class A products have stricter requirements on the content of arsenic, heavy metals (calculated as lead), methanol, and formaldehyde.

Several suggestions for the correct selection and use of dish soap:

1. Choose qualified dish soap produced by regular companies

Detergent produced by regular companies The fine label (or label) trademark pattern is clearly printed (the pattern overprint is accurate and not blurry), and there is no deinking phenomenon. At the same time, the label (or bottle) has the production license number, production date and shelf life or limited use date. In addition, instructions for use, implementation standards, net content, factory name, factory address and other information will also be marked one by one.

2. Try not to use or use less detergent.

For example, if the pot for porridge and rice is not greasy at all, there is no need to use detergent at all, just put it in Just wash it in time after use; for another example, some dishes that are not very greasy can be washed directly with hot water. Similarly, some tableware that is too greasy can be rinsed with hot water first and then use dishwashing liquid. Reduce the amount of dish soap you use.

3. Try to reduce the amount of dishwashing liquid residue as much as possible

For example, it is best not to squeeze the dishwashing liquid directly onto the tableware. You can first add a few drops of dishwashing liquid to half a bowl of water. , then use a dishcloth dipped in diluted dish soap to scrub the tableware, and finally use running water to remove the remaining dishwashing liquid on the tableware.

Is there any detergent residue? 3

How “scary” is the detergent residue? Will it harm human health? Experiments tell you the truth

Why are more and more people doubting dishwashing liquid? Let us tell you a short story below: 38-year-old Xiao Tao (pseudonym) is currently a housewife. Being a housewife is not a "idle job". She not only has to be busy taking care of the food, clothing, and daily life of her family members, but she also has to do housework.

One day, Xiaotao started browsing her mobile phone after finishing her work, when a short video attracted her. What is displayed is "Do you still use dishwashing liquid at home? Long-term use of dishwashing liquid not only hurts your hands but also causes cancer, and CCTV has named it!"

After clicking in and reading the content, it tells the story of what the Industrial and Commercial Bureau once said It was found that the carcinogens in dishwashing liquid exceed the legal limit and are 28 times more harmful to the human body. We urge everyone not to continue using it.

At this time, advertisements also appeared, promoting dishwashers, saying that they were clean and safe and would not hurt your hands. They also came with various "test reports."

Xiao Tao panicked for a moment. She usually used dishwashing liquid to wash dishes and fruits at home, but unexpectedly it could cause cancer. Xiao Tao even had the desire to buy a dishwasher.

Detergent is a "harmful agent". Will using it cause cancer?

Detergent, water, daily necessities, and even many people have said that "the high incidence of cancer in China is because more detergent is used." In fact, does detergent really cause cancer?

The cleaning effect of dishwashing liquid relies on surfactants, which contain a variety of active ingredients. Emulsifiers can easily decompose various greasy substances, harmful substances, disperse and suspend them, etc.

The most convenient thing is that you only need to rinse the dissolved matter with clean water to separate it from the tableware, achieving the effect of cleaning the tableware and making it look very clean and hygienic.

Why is the popular dish soap frequently rumored to cause cancer? This can be traced back to a national special spot inspection of dishwashing liquid product quality supervision in 2014:

This spot inspection covered 28 provinces, and it was found that the product qualification rate was 93.6%, while unqualified products , mainly because formaldehyde exceeds the standard.

The so-called detergent causing cancer, the correct statement should be "unqualified detergent with excessive formaldehyde can cause cancer." What you need to know is that formaldehyde can cause direct irritation to the human body's skin and mucous membranes, leading to an increased risk of related respiratory diseases.

According to relevant national laws and regulations, formaldehyde is not allowed to be added to dishwashing liquid. Some small manufacturers will use it illegally in order to save costs and achieve cleaning results.

How “scary” is the residue of dish soap? Will it harm human health? Experiments tell you the truth

After washing the dishes, you can observe that the tableware washed with dishwashing liquid will have a faint cleanliness. The fragrance makes people feel that they have not been washed clean and there are still residues on them. Will these residues affect the body?

The Kunming National Food Safety Demonstration Team conducted a dishwashing liquid residue experiment. The testers took tableware samples, washed them with dishwashing liquid, measured the inner surface area, and scrubbed them with basins of water. , scrub twice with water in the basin, rinse briefly with running water once, rinse with running water for 30 seconds to remove the detergent residue, and then take samples for comparison and analysis.

The results showed that sodium dodecyl benzene sulfonate residue was the highest after being rinsed once with water in the basin, with an estimated value of 0.081 mg per 100 square centimeters. Rinse twice with water in the basin and rinse briefly with running water. The residues from each pass exceeded the national limit. Only the measured value of sodium dodecylbenzene sulfonate after rinsing with running water for 30 seconds was less than 0.005 mg per 100 square centimeters.

Sodium dodecyl benzene sulfonate is a low-toxic substance. Existing research has found that as long as dishwashing liquid is used correctly, trace amounts of residue will not be harmful to the body. In order to avoid chemical residues, it is recommended that the tableware after using dishwashing liquid should be washed repeatedly with clean water.

Generally speaking, the main ingredients of dishwashing liquid are sodium alkyl sulfonate, sodium fatty alcohol ether sulfate, foaming agent, solubilizer, preservative, etc.

It is understood that in the GB/T 9985-2000 national mandatory standard for dishwashing liquids, the formaldehyde content must be ≤0.1 mg/g and heavy metals ≤1mg/kg. As long as it is a qualified dishwashing liquid product, its formaldehyde content must be ≤0.1mg/g. The chemical composition complies with national standards, so there is no need to worry too much during normal use.

However, we need to remind everyone that some chemical components of dishwashing liquid may cause strong irritation to the skin. Some people will experience itchy skin after using dishwashing liquid. , or even ulceration, it is recommended to wear gloves when washing tableware to reduce skin damage.

How to choose dish soap?

When purchasing dish soap in the market, first look at the label. The label should have the production license number, production date, manufacturer name, and manufacturer address. In addition, regular manufacturers have marked the implementation standards of instructions for use, net content and shelf life, etc. Secondly, look at the sensory indicators of dishwashing detergents. Liquid products should have no odor, no layering, no suspended solids, and no sedimentation.

How to use dish soap correctly?

There are two main ways to use dishwashing liquid to wash tableware:

1. When soaking and washing, dilute the dishwashing liquid to 200~500 times with water (the washing concentration is 0, 2 %~0, 5% is appropriate). The appropriate soaking time is two to five minutes. Scrub with a sponge or rag and rinse with running water.

2. Pour the dishwashing liquid directly onto the sponge or rag, dip it in a small amount of water and wipe the tableware, then rinse repeatedly with running water to reduce the residue as much as possible.

It is recommended to use the second washing method. This method has high concentration and good washing effect. It can clean even heavy oil stains well.

If you choose to use dish soap to wash vegetables or fruits, dilute the dish soap to 200~500 times with water, and keep the soaking time at about 5 minutes. The dish soap will help wash away the residue on the vegetables and fruits. After cleaning pesticides, etc., they should also be soaked and rinsed in clean water.

Dishwashing liquid must be stored away from light. Store it at room temperature and expose it to sunlight, which may affect the outer packaging. Direct sunlight will also cause the temperature to rise, accelerate the oxidation rate, and even affect the cleaning intensity. At low temperatures, it may Will cause turbidity.