Oxalic Acid Content 99.6% Min Sulphate 0.08% Max Chloride 0.001% Max Heavy Metals 0.001% Max Ash 0.05% Max Appearance: Colorless Crystals Packing: 25kgs net bag, 23mts in the 20’ FCL Usage: Purifying agent in pharmaceutical industry, special in antibiotic medication, such as Oxytetracycline , Chloramphenicol , etc; Precipitating agent in Rare-earth mineral processing; Bleaching agent in the textile activities, wood pulp bleaching; Rust-remover for Metal treatment; Grinding agent, such as Marble polishing; Waste water treatment, remo ving calcium from water.