Dipotassium tartrate

Dipotassium tartrate (CAS 921-53-9) is the dipotassium salt of L-tartaric acid, also known as soluble tartar or potassium tartrate. It carries no assigned E-number for direct food use in the EU but is closely related to regulated tartrate salts used across food and cosmetic applications.

In food and beverage formulations, dipotassium tartrate functions as a pH buffer by neutralising excess acidity, maintaining stable tartrate equilibrium in wine processing and fruit-based products. In personal care, it acts as a skin conditioner and stabiliser in emulsion systems, helping to protect formulations against oxidative degradation and thermal stress.

Dipotassium tartrate is available as a white crystalline powder in food-grade and cosmetic-grade specifications, compliant with REACH registration requirements. It is supplied in standard 25 kg bags or bulk quantities. Procurement teams should confirm grade suitability against FCC or Ph.Eur. monographs depending on the intended application. HS code 29181300 applies.