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Mono Potassium Phosphate

A highly soluble salt with various industrial applications, most commonly used as a fertiliser or food additive.


MKP is popular in fertiliser manufacture, particularly for hydroponics and the greenhouse trade. A source of phosphorus and potassium, it has high solubility and a relatively low pH, suiting it to various crops.

It is also a food additive holding E-number E340, functioning as an emulsifier, buffering agent and nutrient source. It is also applied as a buffering agent in healthcare, pharmaceuticals, cleaning products and more.

Our monopotassium phosphate is available as a solid powder and liquid in a range of bulk sizes.

CAS Number
MKP, KDP, E340, Potassium dihydrogen phosphate, monobasic potassium phosphate
25kg (solid); 25L, 200L, 1000L, bulk transfer (liquid)
Chemical Formula



• Fertilisers: Nutrient source (as a fertiliser-grade powder)
• Home gardening and horticultural products

Beverage Ingredients

• Soft drinks
• Condensed milk
• Alcoholic beverages
• Sport drinks
• Energy drinks

Cleaning Chemicals & Detergents

• Buffering agent in certain formulations

Farm & Livestock

• Animal and livestock feeds: Nutrient source

Food Additives

• Baked goods
• Canned fish
• Processed meats, sausages, ham

Healthcare Chemicals

• Buffering agent in pharmaceuticals
• Nutrient in vitamin-based formulations

Industrial Ingredients

• Metal surface treatment: Corrosion inhibitor in metal finishing baths


• Aquaculture: Nutrient source
• Cosmetics: pH adjuster and buffering agent
• Fire extinguishers: Fire suppression agent
• Laboratories: Buffering agent for solutions

Product info download

With over 50 years’ experience, state-of-the-art facilities and a large delivery fleet, we are a leading manufacturer, supplier and distributor of monopotassium phosphate.

Join thousands of customers across the UK and Europe in choosing Airedale Group to meet your chemical requirements.

Please note: We are unable to sell chemicals to members of the public.


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