Zinc borate

Molecular formula: 2ZnO·3B2O3·3.5H2O Molecular weight: 434.5Properties and features: 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. Quality standard

Item	Index
Appearance	White powder
B2O3 %	45-48
ZnO %	37-40
Loss on ignition %	13.5-15.5
Free water %≤	1.0
Pass Mesh 325 %≤	1.0

Use:It is better flam retarding effect and can replace antimonous oxide.Flame Retardant zinc borate is inorganic addition flame retardant. Its characteristics are that it has good hot stability, and not only stops buring and vanishes smokings but also be used with other inorganic flame retardant. It is used in epoxy resin, unsaturated polyester, polyurethane, etc. And it is widely used in rubber, plastic, cable, wood,etc

Package:Plastic weaved bag, lined with PE bag, and 25KG or 40KG weight.