Zinc Borate，Molecular weight: 434.75. 

It is a kind of powder with non-toxic, tasteless, no smell，

relative density : 2.67，melt point: 980oC，Insoluble in ethanol, 

butanol and acetone，Easily soluble in hydrochloric acid, sulfuric 

acid and dimethyl。Refractivity: 1.58~1.59，hard to dissolve in cold 

water，but can dissolve slowly in hot water and turn into 1% solution，

stable under 300oC，once over 300oC will release crystal water which 

can absorb heat and dilute oxygen in the air.