Cuprous chloride dihydrate can also be called Copper Chloride Dihydrate. It is called a white cubic crystal or white powder in different regions. It is slightly soluble in water and soluble in concentrated hydrochloric acid and ammonia. A complex is produced, but cuprous chloride dihydrate is insoluble in ethanol and can be used as a bactericide, a catalyst, a decolorizing agent, and the like.
The cuprous chloride dihydrate is exposed to high-priced copper salt which is easily oxidized to green in the air for a long time. When it is seen, it will decompose and turn brown. It is relatively stable in dry air. It is easy to turn blue into brown when it is wet. It forms iron gray when it melts. It is quickly oxidized into alkali salt in the exposed air and is green. The light turns brown. It is rapidly hydrolyzed in hot water to form cuprous oxide hydrate and turns red, and reacts slowly with strong acid.
The cuprous chloride dihydrate can release carbon monoxide during heating. If there is excessive Cu2Cl2, the absorption of CO by the solution is almost quantitative, so the reaction can be used to determine the amount of CO in the mixed gas in gas analysis.