Copper(II) perchlorate

Copper(II) perchlorate is an inorganic compound with the chemical formula Cu(ClO4)2. It is a salt of copper and perchloric acid. It is a hygroscopic crystalline blue solid. It is commonly encountered as copper(II) perchlorate hexahydrate, According to X-ray crystallography, the salt is the aquo complex [Cu(H2O)6](2+) together with the weakly coordinating anion ClO4-.

Safety
Like any perchlorate, it is a strong oxidizing agent.