Potassium Iodide (KI)

This is our most popular Potassium Iodide (KI) - Potassium Iodide

Potassium Iodide

Potassium Iodide


Our most popular product is displayed above. Other variants of this product are displayed below.

Buy Potassium Iodide from UK Suppliers

ReAgent has been a leading UK chemical supplier for almost 50 years. With accreditation to a number of ISO Standards, as well as a 100% quality guarantee on every product, we have the knowledge and experience to handle all of your business needs.

Order online today where you can also get nationwide next-day delivery and discounts on bulk orders. We also have extra, industry-leading services available on all products, including personalised labelling, customisable packaging and the choice of specific pack sizes. Simply contact us for further information.

Different Grades for Sale

ReAgent is pleased to offer potassium iodide in a number of strengths and pack sizes. Potassium Iodide (KI) is our most popular grade and it is available in 500g, 1kg and 25kg pack sizes. You can also buy Potassium Iodide (Analytical Use), which is tested and certified to AR Standards.  This grade is also available in 500g, 1kg and 25kg pack sizes.

There are many more concentrations and grades available to buy. Just search on our website to see a comprehensive list of what we have to offer.

What is Potassium Iodide?

Potassium iodide is an inorganic chemical compound that is composed of a metal (potassium) and halogen (iodine). This composition classifies it as a metal halide. It can appear as crystals, a white powder or as a liquid solution.

It has a range of chemical properties that make it suitable for a range of uses:

  • Chemical formula: KI
  • Boiling point: 1323°C
  • Melting point: 681°C
  • Extremely soluble with a range of solvents
  • Hygroscopic in moist air
  • Deliquescent in dry air
  • Dissolves elemental iodine
  • Neutral-slightly alkaline pH


Potassium iodide is well-suited to a range of applications across many different industries, including the food, medical and cosmetic industry. Most commonly, it is used as a:

  • Dietary supplement to prevent iodine deficiency. For example, you can buy iodised table salt to ensure you're getting what you need
  • Thryoid protectant in the form of tablets, which can be used to protect the thyroid from absorbing radioactive iodine in the case of a nuclear emergency
  • Expectorant in the medical industry to treat long-term breathing illnesses, like asthma, by decreasing mucus viscosity

Other Services

We also sell a wide range of chemicals and chemical-related products to a huge number of companies ranging from small businesses to multi-national corporations whose names are recognised the world over.  Some of the industry areas we supply to are:

  • Power generation
  • Automotive industry
  • Pharmaceuticals
  • Chemical industry
  • Laboratories
  • Water Treatment industry

Great Quality, Cheap Prices

At ReAgent, we strive to offer all our customers a friendly service. Our of our products are backed by a 100% quality guarantee so that you can relax and buy with confidence.

Place your order online today, or contact our technical sales team for more information. We'll be happy to help you before, during and even after your purchase.