... ; 5, developer and toner; 6, plating additive; 7, used in the production of gold and electrolytic copper; 8, material of ... to produce thiourea dioxide ; 11, chemical reagent; 12, blueprint used in blueprint and clean boiler. Specification:Purity: 99.08%Loss after ... month2. highest purity, lowest content of heavy metal, best package3. competitive price and best service.4. Certificate: ISO9001:2000