Sodium sulphate anhydrous: 1.Specification: Na2so4 99%min Water insoluble 0.05%max Moisture 0.2%max Whiteness 80%min Fe 0.002%max Chloride(as cl) 0.35%max Size: -60 mesh 95%min 50kg per pp bag with inner pe bag or 1000kg per pp bag with inner pe bag.