Chinese name: Cuprous chloride
English name: Cuprous chloride
Chinese alias: cuprous chloride (high activity); Copper monochloride; Cuprous chloride (I)
Copper(I) chloride; cuprous chloride solution; Copperchloridelightgraypowder; Cuprous chloride; COPPER(I)CHLORIDE; Copperchlorideanhydrous; Copper(I) chloride solution; chlorocopper
German name: Kupferchlorid
French name: le chlorure cuivreux
Solubility product: 1.72*10^-7 (25ºC)
EINECS number 231-842-9
Properties: White cubic crystal or white powder, as shown in "chloro-cuprous acid". The relative density is 4.14. Melting point 430ºC. Boiling point 1490ºC. Insoluble in water, water-soluble: 0.06g /L (25ºC), soluble in ammonia to produce diamine cuprous chloride, soluble in concentrated hydrochloric acid to produce chloro-cuprous acid, but also soluble in sodium thiosulfate solution, NaCl solution and KCl solution to produce the corresponding complex, insoluble in ethanol.
When exposed to the air, it is easy to be oxidized to green basic copper chloride, which decomposes and turns brown when seen in light. Stable in dry air, turns blue to brown when wet. Molten iron gray, exposed to the air quickly oxidized to basic copper chloride, green. It turns brown in light. It is rapidly hydrolyzed in hot water to form cuprous oxide hydrate, which is red and reacts slowly with strong acids. Chloro-cuprous acid solution can absorb carbon monoxide and form the complex Cu2Cl2(CO)2(H2O)2 (toxic), when heated, carbon monoxide can be released, if there is an excess of cuprous chloride, the absorption of CO in the solution is almost quantitative, so this reaction can be used in gas analysis to determine the amount of CO in the mixture of gases.
Cuprous chloride is a covalent compound and its melt has poor electrical conductivity. The relative molecular mass of its vapor is determined to confirm that its molecular formula should be Cu2Cl2, and its chemical formula is usually written as CuCl.
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