Specifications Description White crystal powder Assay % 99min Heavy metal ppm 10max Cl-(Chloride)% 0.05max SO42-% 0.01max Ashes% 0.1max Loss on drying% 0.5max PH 5~6 Activity: Used to treat skin ulcers, wound, scalds, burns and acne; also used for cosmetics Packaging: 25 kg per drum; customized package available upon request.