Nickel sulphate, or just nickel sulfate, usually refers to the inorganic compound with the formula NiSO4(H2O)6.
N 1545 (OTTO) Nickel sulphate, 98% Cas 10101-97-0 - used in Ni plating, as mordant in dyeing and in printing textiles, as a blackening agent for zinc and brass and in the fabrication of organic nickel salts.