10101-98-1 7786-81-4 NICKEL SULFATE HEPTAHYDRATE Nickel sulfate heptahydrate [Nickel and nickel compounds] Nickel(2+) sulfate heptahydrate Nickel(II) sulfate heptahydrate Nickelous sulfate heptahydrate Sulfuric acid, nickel(2+) salt (1:1), heptahydrate