Copper Acetate, Basic

Name:
Copper Acetate, Basic
Detailed information:

Chemistry name:	copper subacetate; verdigris; verdigris blue; verdigris green
Properties:
Masses of minute, silky crystals, either pale green or bright blue in color. Blue variety approximate formula (C2H3O2)2Cu2O. Green variety approximate formula CuO•2Cu(C2H3O2)2. Coppery taste. The green rust with which uncleaned copper vessels become coated and which is commonly termed verdigris is a copper carbonate and must not be confused with true verdigris. Apart from its impurities, verdigris is a variable mixture of the basic copper acetates. Soluble in acids; very slightly soluble in water and alcohol.
Derivation:
Action of acetic acid on copper in the presence of air.
Use:
Paint pigment, insecticide, fungicide, mildew preventive, mordant in dyeing and printing.