15699-18-0 7785-20-8 Ammonium nickel(2+) sulfate hexahydrate Diammonium nickel disulfate hexahydrate Nickel ammonium sulfate hexahydrate Nickel ammonium sulfate hexahydrate [Nickel and nickel compounds] Nickel diammonium disulfate hexahydrate Sulfuric acid, ammonium nickel(2+) salt (2:2:1), hexahydrate