copper i acetate formula is a copper salt (commonly known as cupric acetate) with the chemical formula Cu(CH3COO)2. It is soluble in water and is a dark green to bluish-green solid. The anhydrous form is a dark, opaque solid; the monohydrate, on the other hand, is a blueish-green crystalline substance. Both forms are prepared by reacting copper acetate with acetic acid (common vinegar can be used for this reaction).

Copper(II) acetate is a component of verdigris, the blue-green substance that naturally forms on copper after long exposures to atmosphere. It can also be combined with arsenic trioxide to form copper acetoarsenite, a highly effective fungicide and insecticide known as Paris green.

This compound is a strong irritant and toxic to eyes and skin, and should only be handled in a well-ventilated area. It is very volatile, and quickly decomposes in water to give yellow cuprous oxide. It is also a weak base that dissolves copper metal and is therefore not recommended for use in corrosion protection coatings. It can be reduced with zinc or iron to metallic copper for use in metallurgy.