CAS 7785-20-8 appears in our catalog under these names: Nickel ammonium sulfate hexahydrate , Nickel ammonium sulfate hexahydrate, 98% , AMMONIUM NICKEL (II) SULFATE HEXAHYDRATE, AMMONIUM NICKEL(II) SULFATE HEXAHYDRATE&. Offered by: Thermo Scientific (Alfa Aesar), Sigma-Aldrich. Available pack sizes: 100g, 500g, 25G.