Boric acid main purposes: white crystalline powder or flake triclinic axis, shiny crystals, a creamy feel, no odor. Proportion of 1.435 (15 º C). Soluble in water, alcohol, glycerol, ethers and essential oils in a weak acid solution. Boric acid is used extensively for glass (optical glass, acid-resistant glass, heat-resistant glass, glass fiber insulation materials) industry, to improve the heat-resistant glass, transparent performance, increase mechanical strength, shorten the melting time.