Nickel Acetate Efflorescent green crystals; decompose on heating; soluble in water and alcohol; used in plating processes,anodize coatings and as textile dyeing mordant. [Synonyms] Nickel acetate tetrahydrate, Nickel(II) acetate tetrahydrate, Nickel diacetate tetrahydrate, Nickel(2+) diacetate tetrahydrate,Nickelous acetate tetrahydrate, Ethanoic acid; nickel, nickel(2+) acetate hydrate (1:2:4), Acetic acid, nickel(2+) salt, tetrahydrate, tetrahydrate (2:1:2), Diacetatonickel tetrahydrate.