Items Standards Appearance Yellow beige powder Identification Meet the requirements Solid content , % 92% min Sodium sulphate , % 10.0max Water content, % 8.0max Ph value 7.0-9.0 Bulk density, g/cm3 0.5-0.8 Impurity 0.05% max Calcium & magnesium 0.4% max. 25kg 40kg 1000kg per bag.