Boric Acid
Product: Boric Acid (H₃BO₃)
CAS No.:10043-35-3
Hazard Class: 6.1 (Toxic, Reproductive Hazard)
UN No.: 3077 (Environmentally Hazardous)
Appearance: White crystalline powder
Description: Boric acid is produced through acidification of borax (Na₂B₄O₇) with sulfuric acid or mined from sassolite deposits, serving as a weak Lewis acid (pKa=9.24) with unique layered crystal structure. Its multifunctional applications include:
Glass/ceramics: Reduces thermal expansion in borosilicate glass
Flame retardants: Forms protective glassy layer at 170°C
Nuclear plants: Neutron absorber in pressurized water reactors
Medical: Ophthalmic antiseptic (2% solution)
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Sodium Silicate
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