TetrachloroethyleneCAS#127-18-4

Products Description of TetrachloroethyleneCAS#127-18-4

Tetrachloroethylene, also known as perchloroethylene, is a compound formed by replacing all hydrogen atoms in ethylene with chlorine in terms of molecular structure. It was first produced by Faraday in 1821 when he pyrolyzed hexachloroethane. It is a colorless, transparent liquid with an ether-like odor. It is non-flammable. Its relative molecular mass is 165.85. Its relative density is 1.6220. Its melting point is -22.7℃. Its boiling point is 121.2℃ and 33.2℃ (4.000×103Pa). Its refractive index is 1.5055. Its viscosity is 0.839mPa·s (20℃). Its vapor pressure (×103Pa): 5.466 (40℃), 13.865 (60℃), 30.131 (80℃), and 58.128 (100℃). Tetrachloroethylene is insoluble in sugar, glycerol, and protein, but slightly soluble in water (0.015 at 25℃). It is miscible with ethanol, ether, chloroform, benzene, and chlorine organic solvents. It does not hydrolyze. In the absence of air, moisture and catalyst, it is still very stable even when heated to 500℃. It can generate tetrachloroethane when hydrogenated. It generates hexachloroethane when chlorinated. Tetrachloroethylene can also react with bromine to generate monobromotrichloro or dibromodichloro compounds. It can also react with hydrogen fluoride under the action of catalyst. In the presence of light, air and water for a long time, it slowly decomposes into trichloroacetaldehyde and phosgene, and corrodes metals such as iron, aluminum and zinc, which can be inhibited by adding stabilizers. If activated carbon is present, it decomposes into hexachlorobenzene and hexachloroethane when heated to 700℃. Tetrachloroethylene can be oxidized by strong oxidants. Tetrachloroethylene can react violently with barium powder, beryllium powder, lithium chips, nitrogen tetroxide and sodium hydroxide. Tetrachloroethylene is toxic and is a central nervous system depressant that can cause headaches, nausea, vomiting and even coma. The oral LD50 for mice is 8850mg/kg. The maximum allowable concentration in the workplace is 100×10-6.

Tetrachloroethylene Chemical Properties

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Product Application of Tetrachloroethylene CAS#127-18-4

In industry, tetrachloroethylene is mainly used as a solvent, organic synthesis, metal surface cleaner and dry cleaning agent, desulfurizer, and heat transfer medium. It is used as an anthelmintic in medicine. It is also an intermediate for the production of trichloroethylene and fluorine-containing organic compounds. Ordinary residents may be exposed to low concentrations of tetrachloroethylene through the atmosphere, food, and drinking water. Tetrachloroethylene has good solubility for many inorganic and organic compounds, such as sulfur, iodine, mercuric chloride, aluminum chloride, fat, rubber, and resin. This solubility is widely used as a metal degreasing cleaning agent, paint stripping agent, dry cleaning agent, rubber solvent, ink solvent, liquid soap, and degreasing of high-grade fur and feathers; tetrachloroethylene is also used as an anthelmintic (hookworm and gingerworm) and a textile processing and finishing agent.

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