highi-purity emerald green granular crystal, uniform color, no agglomeration uncontaminated welcome to our factory Nickel Sulfate Nickel sulfate hexahydrateNickel salt PropertiesNiSO4.7H2O Test MethodAppearanceEmerald green granular crystal, uniform color, no agglomeration, uncontaminatedVisual InspectionNi≥21. 50%complexometric titrationCo ≤0.0015%GB/T8647.1-2006-GB/T8647.10-2006Cu≤0.0015%Fe≤0. ...