Zinc Borate Flame Retardant ZB Molecular Formula: ZnHBO3 Molecular Weight: 125.23 CAS: 1332-07-6 EINECS: 215-566-6 Appearance: White powder Properties: Zinc borate(3.5H2O),zinc borate(7H2O),zinc borate(modified) and Anhydrous zinc borate are the four main types of zinc borate. white powder.Density is 2.67g/cm3. The melting point is 980℃.The refractive index is 1.58.Insoluble in water, alcohol. but soluble in chlorhydric acid, sulfuric acid. Application: Zinc borate is inorganic addition flame retardant. it has good hot stability, stops buring and vanishes smokings. It can replace antimonous oxide but also be used with other inorganic flame retardant. Widely used in rubber, plastic, wood, cable, coating, etc.Zinc borate,modified can completely replace zinc borate. It have the advantage of lower price, better effect stops buring and vanishes smokings. Packing: 25kgs bag Quality standard: Item Index Zinc borate 3.5H2O Zincborate 7H2O Zincborate Modified Zincborate Anhydrous Appearance White powder B2O3 ??? ???% 48±1.5 41±1.5 ≥48.0 52-56 ZnO??????? % 37±1.5 32±1.5 ≥37.0 42-44 Loss on ignition % 13.5-15.5 24.0-26.5 ≥24 ≤1.5（400℃） Free water %≤ 1.0 1.0 1.0 0.5 Pass Mesh 325 %≤ 1.0 1.0 1.0 1.0 Notes: The particle size can be produced according to customer's requirements.
Zinc borate is inorganic addition flame retardant. it has good hot stability, stops buring and vanishes smokings. It can replace antimonous oxide but also be used with other inorganic flame retardant. Widely used in rubber, plastic, wood, cable, coating,

CAS NO:1332-07-6

EC NO:215-566-6

Molecular Formula:ZnHBO₃

Molecular Weight:125.2261

Synonyms:;Zinc borate;ZINC BORATE EXTRA PURE;zinc hydrogen borate;

Molecular Structure: