Boric Acid -Purity: 99.5% -Powder or Granular -Agricultural/Industrial Use -Dedicated Supplier since 1986 *Features Boric acid, ... often used as an antiseptic, insecticide, flame retardant, neutron absorber, or precursor to other chemical compounds. It has the chemical formula ... (OH)3), and exists in the form of colorless crystals or a white powder that dissolves in water. When occurring as ...