Boric acid is a high pure and the most widely used industrial botate.It (H3BO3) is theoretically composed of boric oxide and water.Crystalline in composition,white in appearance,it can be used as granules or as a powder.Both forms are stable under normal conditions,free-flowing,and easily handled by means of air or mechanical conveying.In solution,they are mildly acidic.
In fiber glass,for example,it reduces melting temperatures and helps the fiberizing process.Generally,B2O3 lowers viscosity,controls thermal expansion,inhibits devitrification,increases durability and chemical resistance,and reduces susceptibility to mechanical or thermal shock.

Boric acid may be used in combination with a sodium borate (borax pentahydrate or anhydrous borax) in order to adjust the sodium to boron ratio in glasses which require low sodium levels.This is inportant in borosilicate glass where B2O3 provides essential fluxing properties at low sodium and high alumina levels.
■ Applications and Benefits
Glass and Glass Fiber(Heat resistant ，illumination、Fiber glass、Pyrex、，Glass instrument,Medical/cosmetic containers,Hollow/solid microspheres,Optical glass,Sealing glass)
Guarantee
B2O3% 56.25-56.8
Equivalent H3BO3% 99.0-100.9
SO4ppm ≤350
CL ppm ≤18
Fe ppm ≤40

Sieve specification
Mesh Size % Retained
Mm Guarantee
0.600 ≤2.0