Potassium Hydroxide Flake 90%


Please note: For Collection orders this product requires photographic identification.

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Potassium hydroxide flake, also known as caustic potash, is a white, odourless solid with the chemical formula KOH. It is a highly basic substance that is used in a variety of industrial applications. Potassium hydroxide is soluble in water and absorbs moisture from the air. It is a strong alkali and is often used in the production of detergents, soaps, and other cleaning agents. It is also used in the manufacturing of potassium-based chemicals and fertilizers, as well as in the processing of food and textiles. Additionally, it is used in the production of biodiesel and in the refining of crude oil.

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Shipping information:
Potassium Hydroxide Flake 90% can only be shipped by courier in Limited Quantity within the UK with a maximum allowable size of 1L per bottle, or multiples of.
Pack Sizes above 1L can only be shipped by ADR approved courier.
Please contact us if you require larger pack sizes of volumes of Potassium Hydroxide Flake 90%.

  • Manufacturing of biodiesel and other chemicals
  • Food processing, as a pH adjuster, peeling agent, and thickening agent
  • Textile industry, in mercerization process of cotton and silk
  • Soap making and detergent production
  • Drain cleaning and pipe clearing
  • Petroleum refining and petrochemical production
  • Battery and capacitor manufacturing
  • Agriculture, as a fertiliser ingredient and soil pH adjuster
  • Water treatment, to control pH and remove heavy metals
  • Photo development, in film processing
  • Polymer production, for various applications.

Minimum Assay: >90%
Molecular Formula: HKO
Molecular Weight: 56.11
Melting Point: 360°C
Boiling Point: 1320-1324°C
Potassium Carbonate (K2Co3): <0.5%
Potassium Chloride (KCl): <0.015%
Iron (Fe): <3ppm
Sodium Hydroxide (NaOH): <5ppm
Sulphated Ash: <5ppm
Bulk Density: 0.8-1.2 g/m3
Lead (Pb): <0.1ppm
Zinc (Zn): <0.2ppm
Arsenic (As): <10ppm

Hazard Class: 8

Packing Group: 2

Hazard Phrases: May be corrosive to metals. Harmful if swallowed. Causes severe skin burns and eye damage.

Prec Phrases: Do not breathe dust/fume/gas/mist/vapours/spray. Wear protective gloves/protective clothing/eye protection/face protection. IF SWALLOWED: Call a POISON CENTER or doctor/physician if you feel unwell. Rinse mouth. IF ON SKIN (or hair): Remove/Take off immediately all contaminated clothing. Rinse skin with water/shower. IF INHALED: Remove victim to fresh air and keep at rest in a position comfortable for breathing. Immediately call a POISON CENTER or doctor/physician. IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.


Cas No: 1310-58-3
Einecs No: 215-181-3


Additional information

Weight N/A
Pack Size

500gm, 1Kg, 3x1Kg, 6x1Kg, 12x1Kg, 24x1Kg