The hottest EPA released the first batch of 10 har

2022-10-19
  • Detail

EPA issued the first list of 10 hazardous chemicals after obtaining further rights

EPA issued the first list of 10 hazardous chemicals after obtaining further rights

December 20, 2016

[China paint information]

president Obama signed the revised Hazardous Substances Control Act

a few days ago, The United States Environmental Protection Agency (epa2) released the first list of 10 hazardous chemicals after the revision of the Hazardous Substances Control Act (TSCA)

in May this year, the U.S. Congress approved the revision of the hazardous substances control act, which has a history of 40 years and aims to ensure the safety of a series of new chemicals, such as dichlorodiphenyl trichloroethane (DDT). The law was originally intended to balance the relationship between the regulation of the U.S. Environmental Protection Agency (EPA) and the economic interests of the chemical industry

with the passage of time, American society gradually found that the law did not give EPA enough power to protect people's safety. Therefore, this bill was revised. The revised law has been widely supported, which will promote EPA to be more proactive in judging the potential harm of new chemicals before they enter the market, and also require EPA to start reviewing the safety of existing chemicals in the world, Among them, EPA is required to list the top 10 major hazardous chemicals in mid December

after the release of this list, EPA will have three years to assess its risks. If EPA finally believes that these chemicals pose an unreasonable threat to human health or the environment, it will have two years to take countermeasures, such as banning the production and use of these chemicals

the 10 chemicals listed this time include:

1,4-dioxane

bromopropane

asbestos

carbon tetrachloride

cyclic aliphatic bromide cluster

dichloromethane

N-methyl pyrrolidone

Pigment Violet 29

tetrachloroethylene

trichloroethylene

asbestos is more eye-catching in this list, and the name of this substance is more prominent.It actually refers to six different minerals that share the same fiber structure. Asbestos used to be the ideal choice of heat insulation materials and flame retardant materials, so it was widely used in construction and other fields until the middle of the 20th century. However, asbestos dust can cause cancer and other fatal diseases. In view of this, the product has been widely banned worldwide. However, asbestos is the direct beneficiary of the defects of the U.S. TSCA act. The U.S. Court ruled in 1991 that EPA cannot prohibit it, because it may harm the interests of manufacturers. After the revision of this law, EPA will finally have the right to take action to get rid of the harm of asbestos

most of the remaining chemicals in the list are halogenated hydrocarbons, which means that they contain chlorine, bromine and related halogen elements. Other notorious halogens also include chlorofluorocarbons. These substances will lead to the destruction of the ozone layer, and the nature of halogens is highly reactive, which makes these chemicals have potential dangerous reactions once they come into contact with biological molecules

for example, tetrachloroethylene is associated with cancer, especially in the kidney. It is usually used for dry cleaning of clothes because of its ability to dissolve oils and other oily molecules. Researchers believe that the by-product of tetrachloroethylene formed in human blood and cells may turn off tumor suppressor genes. In addition, exposure to these substances may also increase the risk of Parkinson's disease. To this end, California has begun to ban the use in dry cleaners

another halide, 1-bromopropane, is mainly used as a solvent for degreasing operations, dry cleaning, asphalt products and adhesive spray. It is also used as an intermediate in the synthesis of perfume and fragrances, and is used to clean metal and plastic parts in industrial environments. It can cause many neurological diseases, including the so-called "dead foot" disease that workers suffer from in the foam pad factory. The New York Times pointed out in its 2013 article that it is estimated that as many as 140 victims in the United States have lost sensation in their calves. Studies in mice have shown that the chemical may damage the body that protects nerves. Ironically, 1-bromopropane was once developed as a substitute for harmful chemicals in the ozone layer, which also shows how difficult it is for the chemical industry to find a useful, safe and economical chemical

n-methylpyrrolidone (NMP) is a non halogenated chemical on the list, which is widely used in the rapidly growing industrial field. At present, it is mainly used for conductive coating of lithium-ion battery electrodes, as well as paint remover and preparation of some drugs. In animal studies, NMP can reduce fertility and hinder fetal growth. In addition, it is also related to some human birth defects and complications

there is analysis and recognition 6 The alarm of time and revolution stops automatically. How much do you know about the digital micro Vickers hardness tester in this list? Bisphenol A (BPA) has been omitted, and its safety problems in the field of plastic additives have been widely concerned by the public, and most companies have voluntarily stopped using it. The structural similarity between BPA and estrogen means that BPA has a certain ability to simulate the role of hormones in the body, thereby breaking the normal physiological environment. However, EPA and other regulators do not consider it a threat to human health

the law stipulates that EPA should complete the review of 20 chemicals and at least maintain the subsequent effectiveness evaluation by 19 years after the basic research is carried out in 20 years

Copyright © 2011 JIN SHI