1332-07-6 Zinc Borate 2335, Zinc Borate 237,Anhydrous Zinc ... 3um-7 um used in PVC, PE, Polyolefin, Epoxy. 1332-07-6 Zinc BorateSpecification: Item/Grade Zinc borate 2335( 2ZnO.B2O3 ... 5-15.5Fineness (Residue on 45um sieve ), % ≤ 0.1Specific gravity, g/cm3 2.67Melting pointoC; 980Temp. of dehydrationoC>320Refractive index 1 ... no mix storage and transportation with acids is allowed. 1332-07-6 Zinc borate