In general, when it comes to the intake of carcinogens, people first think of tobacco, junk food, additives and other "disease entrance" channels.

For people have a "sense of intimacy" clothes, the lack of corresponding awareness, and did not cause strong concern.

What's more, these inferior clothes can even directly alter the structure of human DNA.

01

Part of the clothes "benzidine" content seriously exceeded

According to CCTV.com, in a random inspection by the State Administration of Market Supervision and Administration, it was found that a carcinogenic aromatic amine dye called benzidine exceeded the limit in women's clothing.

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The "benzidine" contained in clothing dyes is a kind of azo dyes, but it is not a dye. It is usually used as a raw material and other aromatic ring systems are used as hair color.

In the process of long-term contact with human skin, harmful ingredients will be absorbed by the skin and decomposed under special conditions to produce more than 20 carcinogenic aromatic amines, forming carcinogenic aromatic amines, which can lead to structural and functional changes in human cell DNA.

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In the long run, mild people will have headaches, nausea, and insomnia, and severe cases will cause cancer and other malignant diseases.

Such as bladder cancer, ureter and renal pelvis cancer, the incubation period of up to 20 years.

According to the standard requirements, the numerical standard has been very strict, and the aromatic amine content must not be higher than 20 mg/kg.

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According to the national standard GB/T 17592-2011 "Determination of banned azo dyes in textiles", the use of azo dyes which release 24 aromatic amine compounds after reduction has been banned.

However, some businesses are still using banned azo dyes due to cost and other factors. In the women's clothing of this sample, the carcinogenic aromatic amine dye reaches 540 mg/kg, which is 27 times of the standard.

02

Standard is not only "benzidine", and formaldehyde

In addition to the excessive content of "benzidine" in dyes, there have been media reports in the past that some clothes were detected with excessive formaldehyde content.

According to the regulations issued by the relevant state departments, the formaldehyde content should be written on the clothing label, but some clothes on the market are not marked, and consumers do not know the formaldehyde content of clothing.

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It is understood that a large number of chemical additives, especially formaldehyde, will be added to the production and transportation of new clothing. Formaldehyde can eliminate wrinkles, save color, almost most new clothes will contain formaldehyde residue.

There are two main short-term hazards of formaldehyde. The first is to stimulate the respiratory tract and skin. When the skin is exposed to formaldehyde, it is prone to tearing, dry cough, sore throat, nausea and other symptoms.

Secondly, formaldehyde can cause skin allergies. Some people will feel itchy skin after wearing new clothes. This is likely to be a rash and itching caused by residual formaldehyde.

Does formaldehyde on clothes cause cancer?

The World Health Organization does list formaldehyde as a group 1 carcinogen, but to determine whether a thing is carcinogenic, it depends on the concentration and duration of contact with the human body.

The peak of formaldehyde causing cancer is above 4.0 ppm or the average concentration is above 1.0 ppm. The detection data show that the new clothes may release about 0.012~0.426 ppm of formaldehyde.

From the above data, it can be seen that the residual formaldehyde on the new clothes is far less than the carcinogenic amount of formaldehyde.

Therefore, do not be frightened by the statement that "formaldehyde on new clothes will cause cancer". The premise of formaldehyde causing cancer is to reach a certain concentration.

03

When buying clothes, you must understand the label.

After buying new clothes, don't be in a hurry to cut off the label. In the tag information of the clothes, the clothes have three security technology levels of A, B, and C.

In the "national textile basic safety technical specification", the allowable limit of formaldehyde content is stipulated:

Among them, category A refers to infant wearable textile products, that is, textile products worn or used by infants aged 36 months and below, including diapers, underwear, socks, coats, hats, bedding, etc.; its formaldehyde content must be less than 20 mg/kg.

Class B refers to textile products that can directly contact the skin, including bras, shorts, lint underwear, summer clothes and suspenders, etc., with a formaldehyde content of less than 75 mg/kg.

Class C refers to textile products that cannot be in direct contact with the skin, including coats, pants, etc., and the formaldehyde content is required to be less than 300 mg/kg.

At the same time, when buying clothing, these types of clothing should pay special attention to the purchase of textiles that can easily lead to excessive formaldehyde, there are four main categories:

One is not ironing wear;

Second, fashion jeans of different shades;

Third, children's clothing;

Four is stored in the old and new wooden furniture clothing.

If the formaldehyde content of the large core boards used in the purchase of furniture and decoration is relatively high, it will directly pollute the clothes placed in the wardrobe.

04

When buying new clothes, pay attention to the following points

When buying clothes, you should pay attention to the following three points:

First of all, it should be purchased through formal channels, its supply and quality are easier to be guaranteed, and the quality of after-sales service is generally higher;

Secondly, when purchasing products, it is necessary to see whether there are instructions on the product and its packaging (I. e. product identification), and pay special attention to whether the safety category of the product is indicated. For example, adult clothing should comply with GB 18401, and baby clothing should comply with GB 31701 Relevant regulations;

Third, because azo dyes are used for dyeing and printing of various natural and synthetic fibers, try to buy as little clothes that are too bright, because the general color fastness of dark fabrics is not very good, or in order to save costs and reduce the number of cleaning, the fabric The residual chemical risk is relatively high, and some chemicals can be cleaned without cleaning once.

With dye color is too bright, environmental protection is more difficult to achieve, so avoid choosing too bright fabrics, especially baby products.

Therefore, when purchasing textile products for printing and dyeing processing, we should try our best to choose clothes with light color and small printing parts.

When it is impossible to confirm whether the clothes meet the safety standards, you can go to the local textile quality inspection center to do textile testing such as clothing and bedding.

Some local textile quality inspection centers are free of charge. Consumers do not need to pay any fees regardless of whether the purchased products have quality problems.

At the same time, whether it is personal clothes or coats, they should be cleaned with warm water after purchase. For example, the volatility of formaldehyde will increase at about 40 degrees, and they should be worn after formaldehyde volatilizes.