Boric acid 99.6%    GB530-90

Content of H3BO3%      99.6% min

B2O3      56.5% min

Water insoluble matter    0.01% max

Sulfate(as SO4)%   0.10 % max

Chloride(as Cl)%    0.05 % max

Fe% 0.002% max

Appearance: Colourless or white odourless crystalline solid