Magnesium sulphate anhydrate appearance:white powder(0.1-1mm) or granular(below 4mm), assay:98%min, MgO:33%min, Cl:0.05%max, Fe:0.01%max, heavy metals:0.05%max, As:0.001%max, K2SO4:0.6%max, moisture:0.5%max Packing: 25kgs plastic woven bags 24mt/20'fcl