Sodium Hexametaphosphate tech grade Specification: Appearance: White powder Total phosphate as P2O5: 68% min Inactive phosphate as P2O5 : 7.5% max Iron: 0.05% max PH value(1% solution) : 5.8-7.3 Water insoluble: 0.05% max Packing: 25kg/bag, 22MT/20FCL