Basic Copper Chloride is a green monoclinic crystalline fibrous mass or dark green powder. The precipitate obtained from the solution shows green color at the beginning and turns dark green in the solution after standing. It is insoluble in water and soluble in acid. It is also dissolved in the aqueous solution of qing compound, ammonium salt and alkali metal carbonate to form copper complex. ; Cu(OH)2CO3: Dark sky blue very bright monoclinic crystal or compact crystal cluster. It is insoluble in water, soluble in ammonia water and hot and concentrated sodium bicarbonate solution to form blue.
Toxicity
Among the harmful effects of excess copper, the thiohydrogen reaction of Cu2+ with enzyme plays a decisive role. When drinking 44 mg/L water containing copper, acute gastroenteritis occurs. Oral administration of 0.2～0.5 g copper salt can cause vomiting, 1~2 g copper salt can cause severe vomiting, and sometimes fatal poisoning can occur. Chronic poisoning is manifested by nervous system dysfunction, liver and kidney dysfunction, nasal septum ulcer and perforation, and facial skin, hair and conjunctiva sometimes become light yellow green or light black green. Dust and solution can irritate eyes and mucous membranes. The maximum allowable concentration of metallic copper is 1 mg/m3 and copper oxide is 0.1 mg/m3.
In case of copper poisoning, gastric lavage with 0.1%K4[Fe(CN)6] solution or oral administration of protein water and magnesium oxide salt laxative can be used. Abdominal pain can be injected subcutaneously with 0.1% atropine sulfate 1 mL；; Irritated eyes can be washed with water. Wear gas masks, protective glasses and dust-proof work clothes when working.
Drinking after poisoning: 1. Drinking fresh milk or egg white solution 2, sodium sulfate solution 3 and sodium bicarbonate solution.
The latter chemical formula is 2CuCO3·Cu(OH)2) 2, dark sky blue, very bright monoclinic crystals, or compact crystal clusters. It is insoluble in water, soluble in ammonia water and hot and concentrated sodium bicarbonate solution to become blue, and decomposes at 300℃. Basic Copper Carbonate can be used to make flares, fireworks, paint pigments, pesticides and antidotes, as well as electroplating.