Synonyms: Basic zinc carbonate; zinc subcarbonate; carbonic acid, zinc salt (1:1) CAS NO. :5970-47-8 M.W. :ZnCO3·2Zn(OH)2·H20 M.W. :342.19 Properties :White, crystalline powder. Soluble in acids, alkaline and ammonium salt solutions; insoluble in water. Sp.gr.4.42-45; Nontoxic. Application:Basic Zinc Carbonate is mainly used for transparent activator in rubber, feed additives; sulfur absorber in petroleum industries; cosmetics; pharmaceuticals;zinc Salts. Packing:Woven bags lined with plastic bag.25Kg net each. Specification(%)Basic Zinc Carbonate Zn.dry 57.0min. Loss in ignition 25.0-30.0 Pb 0.02max. SO4 1.5max. H2O 3.5max. Size(pass through 75um sieve) 98.0min.