highi-purity emerald green granular crystal, uniform color, no agglomeration uncontaminated ... Nickel sulfate hexahydrateNickel salt PropertiesNiSO4.7H2O Test MethodAppearanceEmerald green granular crystal, uniform color, no agglomeration, uncontaminatedVisual InspectionNi≥21 ... acid, etc., avoided mixing storage. Sample would be provided if needed, welcome to visit our factory! Emerald green granular ...