Ligand reaction elements gravimetric, volumetric analysis and photometric analysis of a wide range of applications, primarily as a color agent, indicator, precipitating agent, titrant, extraction agent, masking agent. For example, fluoride ions as a masking agent tetrachlorethylene, can generate colorless and iron (Ⅲ) and stable [FeF6], measured using iodimetry avoid the interference of copper iron (Ⅲ) ions; to diacetyl two oxime as a precipitating agent, nickel and palladium can simultaneously generate chelate precipitate, the precipitate is dissolved in acid nickel, palladium precipitated insoluble, can be isolated, identified nickel and palladium; thiocyanate salt as a color-developing agent, with Fe ions to form blood-red complexes, to identify the presence of Fe. EDTA (ethylene diamine tetra-acetic acid) can generate varying stability of complexes with most of the metal ions, titration analysis is an excellent titrant, by controlling the pH of the solution and adding masking agents, uncovering agent , can be quantitatively titrated with EDTA from the mixed solution of various metal ions out of their contents, respectively, the interference element separation step is omitted. 1, the median lethal dose (LD50) :( rat, oral) 13g / kg; (mouse, oral) 8.4g / kg. 2, generally will not burn, but prolonged exposure to high temperature fire and still burning. Heat generated by the decomposition of toxic corrosive flue gas. [3] 3, pure tetrachlorethylene in air in the shade is not oxidized, but is oxidized by UV irradiation gradually factory direct tetrachlorethylene, generating a small amount of trichloroacetyl chloride and phosgene. Therefore, the industrial use of tetrachlorethylene to add a small amount of phenols (hydroquinone), amines, alcohols, nitriles, etc. as a stabilizer. Medicine with tetrachlorethylene add a small amount of alcohol, thymol as stabilizer. Containing stabilizers of tetrachlorethylene in the air, or the presence of water and irradiated with light, even if heated to 140 ℃, commonly used metal material and no significant corrosion. Without stabilizer tetrachlorethylene, when in prolonged contact with the optical effect of water, gradually hydrolyzed into three monochloroacetic acid and hydrogen chloride. PCE in the absence of a catalyst, the presence of air and moisture Luxi Chemical tetrachlorethylene, heated to about 500 ℃ is stable. But together with the air through the red-hot pipe, the pyrolysis of carbon monoxide, chlorine, and phosgene. 700 ℃ in contact with the activated carbon generation hexachloroethane and hexachlorobenzene. Tetrachlorethylene and ozone reacts trichloroacetyl chloride and phosgene. Generating trichloroacetyl chloride and a small amount of tetrachloro-dinitro oxide with a mixed acid of sulfuric acid and nitric acid. Heated with concentrated nitric acid does not react with fuming nitric acid effect is generated trichloroacetyl chloride and tetrachloro-dinitro ethane. And nitrogen dioxide at 100 ℃ reaction tetrachlorodifluoroethane nitroethane. Hydride generating tetrachloroethane. Under high pressure with ammonia, decomposition into ammonium chloride and carbon. React explosively with potassium metal in the vicinity of the melting point, no reaction occurs with metallic sodium. Chlorination is generated by the light hexachloroethane. And a mixture of hydrogen fluoride and chlorine in zirconium fluoride catalysis, 225 ~ 400 ℃ to give 1,2,2-trichloro-1,1,2-trifluoroethane CClF2CCl2F (Freon -113). In the presence of aluminum chloride, and other chlorinated hydrocarbons condensation reaction of high-boiling substances. [5] Shandong tetrachlorethylene _ Xiang dry chemical (certified) _ Liaocheng perchlorethylene dry by Jinan Cheung Chemical Limited. Jinan Cheung Dry Chemical Co. (www.xiangqianhuagong.com) (www.dilunyierchun.com) Shandong Jinan, alcohols leaders, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs. Cheung dry chemical leadership with the staff warmly welcome all inquiries negotiations to create a dry chemical Xiang a better future. You can also access (www.dilunyierchun.com/supply_details_49323300.html), for more information about the company.