Dipotassium phosphate

Dipotassium phosphate (CAS 7758-11-4), also known as potassium phosphate dibasic or DKP, is an inorganic potassium salt.

Where is Dipotassium phosphate used?

• Food and beverage: prevents protein precipitation and controls pH in dairy-based products, coffee creamers and processed cheeses
• Pharmaceuticals: buffering component in parenteral solutions, culture media and tablet formulations
• Water treatment: inhibits scale formation and sequesters calcium and magnesium ions
• Fermentation media: nutrient source
• It supports microbial growth in industrial bioprocessing and yeast-based production.
• Functions as an emulsifier in specified cheeses and as a buffering agent for processed foods.
• Used in ethylene glycol antifreeze formulations as a corrosion inhibitor system together with borates, nitrites, nitrates and/or silicates.

Good to know: Buyers for regulated applications typically require certificates of analysis aligned to USP or FCC monograph standards.

Formulation notes

• Mixing with water can cause an exothermic reaction, releasing heat.
• May have compatibility issues with calcium- or magnesium-containing components.

Typical specification

• Available in technical, FCC, USP, EP and food grades.
• Supplied in powder and granular form.
• Deliquescent solid; tends to absorb moisture from the air and dissolve in it.

Regulatory status

• Listed in US food additive and GRAS regulations 21 CFR 175.105 and 182.6285.
• Registered under the REACH Regulation and produced and/or imported in the European Economic Area at ≥10,000 to <100,000 tonnes per year.

Storage, packaging and handling

• Must be stored in a cool, dry place away from flammable substances and direct sunlight.

Technical content is compiled and updated by the SoleChem product team from public technical sources; the certificate of analysis (COA) governs product-specific specifications.