The product has The Certificate awarded by State Test Institute of Chemical Industry Zlín Use: Purifying agent in pharmaceutical industry, special in antibiotic medication, such as Ox tetracycline , 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, removing calcium from water. Packing: 25/50 kgs grey color PP bag of top grade linerfilm, good properties of waterproof and avoid water, solarization;