Dipotassium phosphate (DKP) is a white crystalline powder widely used as a buffering agent, stabilizer, and emulsifier in processed foods. Also known as dibasic potassium phosphate or phosphoric acid dipotassium salt, it carries the E-number E340 in European food regulations. Kosher food manufacturers rely on DKP for its functional versatility across dairy alternatives, beverages, and processed cheese formulations.
Food-grade dipotassium phosphate is produced by reacting potassium hydroxide with phosphoric acid. Since both raw materials are mineral-derived and the manufacturing process does not involve animal products, DKP is classified as pareve under kosher law. It is available in FCC, kosher, and NSF certified grades from major chemical distributors.
How DKP Is Made and Why It Is Kosher
The production of food-grade dipotassium phosphate starts with phosphate rocks, which are mined, refined, and purified to produce phosphoric acid. This phosphoric acid is then reacted with potassium hydroxide and lime water to form a wet mix that is further processed into the final crystalline powder. Companies manufacturing phosphoric acid in the U.S. and Europe follow strict purification procedures to ensure food-grade quality.
Because every input material in this process is inorganic and plant-free, the resulting DKP qualifies as kosher pareve without additional processing considerations. Certification bodies verify the full supply chain from raw material sourcing through final packaging.
Key Food Applications
Non-dairy coffee creamers represent one of the largest applications for kosher dipotassium phosphate. DKP acts as a stabilizer that prevents protein coagulation when the creamer contacts hot, acidic coffee. Without a buffering agent, plant-based proteins in creamers would clump and separate.
In processed cheese and cheese sauces, DKP functions as an emulsifying salt that helps maintain smooth texture and prevents fat separation during heating. It is also used in condensed milk, evaporated milk, and sour cream to control pH and improve shelf stability. Beverage mix manufacturers add DKP to powdered drink formulations for its buffering and mineral fortification properties.
Beyond Food: Pharmaceutical and Supplement Uses
Dipotassium phosphate serves as a nutrient source in antibiotic production and as a potassium and phosphorus supplement in nutritional products. Pet food manufacturers include DKP as a mineral source, and it appears in various animal feed formulations. In cosmetics and personal care, it functions in formulations for moisturizing creams, toothpaste, and makeup removers, though these applications fall outside food-grade requirements.
For nutraceutical applications targeting kosher-observant consumers, using NSF and kosher certified DKP ensures compliance with both regulatory and dietary requirements in a single ingredient.
Purchasing and Specification Notes
Food-grade dipotassium phosphate anhydrous is commonly sold in 50 lb bags. The FCC grade meets Food Chemicals Codex standards for identity, purity, and heavy metal limits. When sourcing kosher DKP, request the current kosher certificate from your supplier alongside the standard certificate of analysis and safety data sheet.
Synonyms you may encounter on supplier documentation include dibasic potassium phosphate, dipotassium orthophosphate, and phosphoric acid dipotassium salt. All refer to the same compound with CAS number 7758-11-4.
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