3.5 H2O zinc borate 2335, Zinc ... 7 um used in PVC, PE, Polyolefin, Epoxy 3.5 H2O Zinc BorateSpecification: Item/Grade Zinc borate 2335( ... size, um 3-73-7ZnO, % 37.0-40.0B2O3 , % 45.0-48.0Loss on ignition,% 13.5-15.5Fineness ... etc decorative materials to improve flame retardant performance. 3. Base on its chemical properties, Zinc borate is ... and transportation with acids is allowed. 3.5 H2O zinc borate