Boric Acid - H3BO3

What is Boric Acid?

Boric Acid is a monobasic Lewis acid of boron with a chemical formula H3BO3. It is an acid containing four atoms of oxygen, one atom of phosphorus, and three atoms of hydrogen. It is also known as acidum boricum, hydrogen borate, boracic acid, and orthoboric acid. It is a weak acid and has antiviral, antifungal, and antiseptic properties. It is soluble in water and does not have a smell. It exists as a colorless crystal or in white powder form. We can prepare boric acid by reacting borax with hydrochloric acid. Wilhelm Homberg was the first to prepare boric acid from borax.

Learn about chemical formula of various other chemical compounds here.

Properties of Boric Acid – H3BO3

H3BO3 Boric Acid
Molecular Weight/ Molar Mass 61.83 g·mol−1
Density 1.435 g/cm3
Boiling Point 158 °C
Melting Point 300 °C

Structure of Boric Acid (H3BO3)

Boric acid Structure

Structure of Boric acid

Boric Acid (H3BO3Uses

  • It is used in the manufacture of textile fiberglass
  • It is used in the production of the flat panel display
  • It is used to neutralize the active hydrofluoric acid
  • It is used by blacksmiths as welding flux
  • It is used in electroplating
  • It is used in the jewelry industry
  • It is used in the manufacture of silly putty
  • It is used as an Insecticidal
  • It is used as an antiseptic and antibacterial
  • It is used on carrom boards as a dry lubricant
  • It is used as a neutron poison in some nuclear plants
  • It is used to preserve grains like wheat and rice

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Frequently asked questions

1.What is the other name of Boric acid?

Ans: Acidum boricum.

2. Write the chemical formula for Boric acid.

Ans: H3BO3.

3. What is the molecular mass of Boric acid?

Ans: 61.83 g/mol

4. Write the boiling and melting point of Boric acid.

Ans: Boiling point =  158 °C, melting point =  300 °C.

5. List two uses of Boric acid.

Ans: It is used as an antiseptic or neutron absorber.

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