Boric Acid (H3BO3) is a weak acid having antifungal and antiviral properties. It is derived from Borax. It has its other names as hydrogen Borate and Orthoboric acid. It should not be swallowed or inhaled in huge amounts as it will prove poisonous. It sinks when mixed with water. It is a monobasic acid of boron. Decomposition of Boric Acid is done at above 100°C forming metaboric acid and boron oxide. Its molecular geometry is trigonal planar. It is used as an astringent. It is stable in the air. Boric acid is the conjugate acid of dihydrogen borate.