Appearance: White Flakes or Powder Content: 95 % min Moisture: 4.5 % max pH Value: 7-9 Insolubles in water: 3% max Chloride: 0.1 % max Sulphide: 0.05 % max Packing: In P. P. Woven bags of 25 kgs net each P. E. Liner inside CAS NO.: 7789-41-5