1. Hair dyes usually use azo dyes, one of which is called' p-phenylenediamine', which is easy to cause harm to human skin. May cause allergic reactions, such as contact dermatitis, eczema, rhinitis, asthma, etc. , leading to scalp, face and neck skin redness, papules, exudation, blisters, itching, skin damage and so on. At present, hair dye has become an important cause of contact dermatitis.
2, inducing cancer, azo dyes, also known as decomposable aromatic amine dyes, are dyes synthesized by 23 carcinogenic aromatic amines as intermediates. At present, there are about 360 kinds of such dyes in the world. Among them, 2- naphthylamine and benzidine are the strongest carcinogens, which can lead to malignant tumors, especially underwear. When it comes into direct contact with human skin, its toxic components will be absorbed and diffused by the skin, causing cancer.
It is reported that as early as the late 1980s and early 1990s, China conducted medical research with Tianjin people as samples, and found that the incidence of bladder cancer in people who frequently contacted benzidine was 28 times that of normal people, and the incubation period was as long as 20 years.
3, causing environmental pollution and causing harm to the human body. In addition, some of the most toxic dyes may emit a lot of pollutants during bleaching and dyeing, causing serious air and water pollution.
Extended data:
In view of the harm of azo dyes, in 1994, the German government officially banned the use of some azo dyes in consumer goods that have been in contact with the skin for a long time. After the implementation of 1996 in April, the Netherlands, France and Australia were all drafting similar laws, and the General Administration of Quality Supervision, Inspection and Quarantine of China also drafted the national standard of Basic Safety Technical Requirements for Textiles in 2002.
On September 1 1 day, 2002, the European Commission issued Order No.61,which banned the use of azo dyes that would decompose to produce 22 kinds of carcinogenic aromatic amines under reducing conditions, and stipulated that after September 1 1 day, 2003, azo dyes would be used in the EU1.
China's first compulsory textile standard, National General Safety Technical Specification for Textile Products, will be officially implemented on June 5438+1 October1day, 2006, and related enterprises are prohibited from producing, selling and importing textile products containing decomposable aromatic amine dyes.
Phoenix. Toxic clothing dyes can cause cancer. Carcinogenic aromatic amines are banned in many countries.
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