SVHC is a chemical substance of high concern. They are listed as key monitoring objects in about 30,000 chemical products and 3 million to 5 million downstream textile, light industry, electronics and pharmaceutical products in the EU market, and their content is regulated ( Textile chemicals and textile clothing with a mass fraction of ≥0.1% and an annual output of ≥1 t must be notified, and strict evaluation and market access authorization must be implemented. SVHC consists of the following 4 chemical substances:
(1) Category 1 and 2 chemical substances that are carcinogenic, mutagenic and reprotoxic (CMR);
(2) Persistent, stable and bioaccumulating toxic chemicals (PBT);
(3) Chemical substances with high persistence, stability and high bioaccumulation (vPvB);
(4) Chemical substances that seriously affect human health and environmental protection, such as environmental hormones.


The EU REACH regulation (EC1907/2006) considers that there are more than 900 SVHCs on the market now, plus about 600 more that may be identified by collecting new data in 11 years after the regulation is implemented, so that the regulation will identify about 1500 SVHCs. .


3New trends in banned and restricted chemical substances in textile auxiliaries
As the market has put forward more and more stringent requirements for human safety and health and ecological environment protection, newly banned and restricted chemical substances in textile auxiliaries have been introduced in recent years, especially reflected in the requirements put forward by large textile companies and brand textile sellers. The chemical restriction clauses also reflect current market trends and new legal constraints. There are mainly the following new developments.
3.1 Stricter restrictions on polyhalogenated dibenzo-p-dioxins and polyhalogenofurans
Polyhalogenated dibenzo-p-dioxins and polyhalogenated dibenzofurans are two types of environmental hormones. They are extremely difficult to decompose and biodegrade. They are highly lipophilic and highly bioaccumulative in the environment. They are the most toxic environmental pollutants known. things. Its mutagenicity and carcinogenicity are 10 times higher than the known carcinogen aflatoxin, and several times higher than 3,4-benzopyrene, nitrosamines and polychlorinated biphenyls. They are mainly decomposed by AOX thermal Or generated from waste and liquid waste during burning, preparation of wood preservative pentachlorophenol, use of certain paint additives, preparation of halogen flame retardants and certain optical brighteners, etc. Today's market is divided into five groups according to their different toxic congener combinations, which stipulate more stringent limit limits.


3.2 Ban on fluorinated greenhouse gases
It is generally believed that the increasing content of greenhouse gases in the atmosphere is the main cause of the gradual rise in global temperatures. According to the 2007 report of the United Nations Climate Change Research Group, in order to limit the concentration of greenhouse gas CO2 in the atmosphere to 450×10-6 Within this period, the entire world will have to reduce emissions by 50% to 80%. Currently, the fossil fuel coal that releases the most CO2 is coal.
VOC emissions, especially high VOC emissions, are also one of the main reasons for the gradual rise in global temperatures. High VOCs fall into a wide range, generally aliphatic hydrocarbons with less than 8 carbons, alcohols, ethers, ketones, esters, Amides, halogen compounds, unsaturated hydrocarbons, aromatic hydrocarbons, and heterocyclic compounds such as tetrahydrofuran, tetrahydropyran, tetrahydrothiazole, methylpyridine, methylmorpholine, etc. all belong to this category. Fluorinated greenhouse gases not only affect global temperatures as high VOCs, but also destroy the ozone layer, form holes, and accelerate the rise of global temperatures. Therefore, in order to reduce environmental greenhouse gas emissions, fluorinated greenhouse gases must be banned.


3.3 New restrictions on flame retardants
According to the requirements of Eco-label and Eco-Tex Standard 100, all organic synthetic flame retardants circulating on the market, except decabromodiphenyl ether, have problems that are harmful to human health and pollute the ecological environment.
Recently, some textile companies have proposed chemical restrictions that further refine and tighten commonly used flame retardants:
(1) The newly banned flame retardants include chlorinated paraffins (C10~C13), pentabromodiphenyl ether (PBOPE), and octabromodiphenyl ether (OBDPE);
(2) The new flame retardant that cannot be detected is bis(2,3-dibromopropyl)phosphate;
(3) New restrictions have been proposed for decabromodiphenyl ether. Decabromodiphenyl ether is a halogen-containing flame retardant that the EU spent 10 years studying 588 risk assessment projects and concluded that it poses no risk to human health and is harmful to human health. The environment is non-polluting and non-hazardous and is included in the exemption list. However, the EU clearly states that the content of commercial decaBDE should be greater than 97.4%, nonaBDE less than 2.5%, octaBDE and pentaBDE. The content of decaBDE is no more than 1 000 mg/kg. However, at the end of 2007, some large European and American textile companies still proposed new limits for decaBDE, stipulating that the limit in terms of mass fraction is 0.1% (i.e. 1 000 mg/kg). kg).


3.4 Other new restrictions
(1) New requirements for restrictions on organotin compounds. According to the requirements of Eco-Tex Standard 100, organotin compounds on textiles only refer to DBT, TBT, and TPhT. Except for TBT, which cannot exceed 0.5mg/kg for baby products, the others are Cannot exceed 1 mg/kg;
(2) DINP and DIDP are confirmed to be safe and risk-free. DINP and DIDP are diisononyl phthalate and diisodecyl phthalate respectively. They are mainly used in textiles, leather, toys, packaging, furniture, and plastics. Phthalate plasticizers such as PVC products that are in close contact with consumers;
(3) New restrictions on asbestos fibers. The 2008 version of Eco-TexStandard 100 added regulations that classify asbestos fibers as hazardous substances and impose restrictions;
(4) The range of banned organic solvents has been expanded. Since some organic solvents are VOCs and the other are AOX, they will harm human health and the ecological environment. Therefore, more and more organic solvents are required not to be detected, and more than Eco-Tex Standard100 is more stringent.