Boric Acid (H3BO3)

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Why Buy Boric Acid Online from ReAgent UK?

At ReAgent, we take pride in the reputation we've been building for over 40 years. We are internationally recognised for our commitment to high quality and industry-leading customer service, and that's why all of our products are backed by a 100% quality guarantee - so that you can buy with confidence.

Our online chemical shop has boric acid available in a range of pack sizes, including 500g containers and 25kg bags. We can also offer you any specific, non-standard pack size you may be after, and have a range of different grades available to suit your needs.

Buy online today where you can get discounts on bulk orders and 24-hour delivery nationwide. No matter what you're looking for, we'll be here to make it a reality.

About Boric Acid

As the name suggests, this compound is a weak acid of boron with the formula H3BO3. Also known as boracic acid or hydrogen borate, boric acid appears in the form of colourless crystals or a white powder that easily dissolves in water.

Boric acid has a wide range of uses across many different industries. It is used:

  • As an insecticide for the control of ants, cockroaches, termites, fleas, etc
  • In the manufacture of flame retardants 
  • In the manufacture of textile fibreglass used to reinforce plastics
  • With silicone oil to manufacture silly putty
  • As an antiseptic for minor burns
  • As a preservative for wood, timber and cattle hides
  • As a pH buffer in swimming pools
  • As a neutron poison in nuclear power plants

Natural Occurrence

In natural condition, boric acid is a component of a mineral called sassolite. This occurs near volcanoes in places like Tuscany, Italy, the Lipari Islands and Nevada.

It is also found mixed with other compounds in boracite, boronatrocaicite or colemanite. Boric acid can also be found as a predominant salt in salt water.


Boric acid can be synthesised by two main processes:

  1. Via a reaction between sodium tetraborate decahydrate (Na2B4O7·10H2O, also known as borax) and hydrochloric acid (HCl):Na2B4O7·10H2O + 2 HCl → 4 H3BO3 + 2 NaCl + 5 H2O
  2. As a by-product of hydrolysis of diborane (B2H6) or boron trihalides (BX3, where X can be Bromium, Iodine or Chloride):B2H6 + 6 H2O → 6H2 + 2B(OH)3BX3 + 3 H2O → 3HX + B(OH)3

Excellent Customer Service

With over 40 years of experience in the field, we've built an enviable reputation for high-quality products and excellent customer service. We'll support you before, during and even after your purchase to ensure our products are meeting your expectations.

Simply contact our technical sales team if you have any queries, and a member of staff will be glad to assist you.

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