zinc borate 1.Appearance: white powder 2.Cas no.;1332-07-6 3.Molecular weight: 434.62

Zinc Borate

1.Basic Index

Molecular formula	2ZnO·3B2O3·3.5H2O	Molecular weight	435.4
Appearance	white powder	Melting point	980°C

2.Specification

Item/Grade	Zinc borate ( 2ZnO.3B2O3 3.5H2O)
	Excellent grade	First grade
Whiteness	99	95
Surface water % ≤	0.5	1.0
Particle size, um	3-5	3-5
ZnO, %	37.0-40.0
B2O3 , %	45.0-48.0
Loss on ignition,%	13.5-15.5
Fineness (Residue on 45um sieve ), %  ≤	0.1
Specific gravity, g/cm3	2.67
Melting pointoC;	980
Temp. of dehydration oC>	320
Refractive index	1.58

3.Application Field      Flame Retardant ZB 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.

4.Packing and store 

Packing: brown paper double deck tectorial bag, and net weight per bag is 25kg.store: storing in dry, ventilated and moistureproof conditions.

99% Zinc borate for Flame retardant