Cleansing Agent

Potassium C11-15 Alkyl Phosphate

INCI: POTASSIUM C11-15 ALKYL PHOSPHATE

Reviewed by Rosie · Last updated 18 Aug 2026

What Is Potassium C11-15 Alkyl Phosphate?

Potassium C11-15 Alkyl Phosphate (INCI: POTASSIUM C11-15 ALKYL PHOSPHATE) is a cosmetic ingredient listed in the EU CosIng inventory. Potassium salt of the phosphoric ester of C11-15 alcohol.

Its declared cosmetic function is surfactant.

Source: European Commission CosIng inventory.

From the Clinic

Not sure what your skin actually needs?

Two minutes, a few questions, and we’ll point you at what matters — no guesswork.

Take the skin quiz

Learn More About Skincare Ingredients

Explore our comprehensive ingredient glossary to understand what's in your products.

Browse All Ingredients

Authorised Stockist

Official UK retailer

Tracked Delivery

Free UK shipping over £50

5 Star Rating

Trusted by thousands

Expert Advice

Free consultations