... 99.4%99.0%water insoluble 0.010 max0.0400.060Sulfate 0.10 max0.200.30Chloride 0.010 max0.0500.10Fe 0.001 max0. ... , and trace element fertilizers. Boric acid is produced diboride matrix material, and its metal welding, leather, precious stones, electronics, defense ... agglomerate.11. Package: PE bag lined with plastic woven bag, net weight 50 kg. high quality and best price Boric acid for glass production ...