Potassium C11-15 Alkyl Phosphate

AKA: Anionic surfactant

Synthetic

Cleanser

Clean

OriginDerived from C11-15 fatty alcohols and phosphoric acid, typically sourced from petroleum or plant oils. Synthesized through esterification of the alcohols with phosphoric acid, then neutralized with potassium hydroxide.

Potassium salt of the phosphoric ester of C11-15 alcohol

CAS #

90506-45-9; 17026-85-6; 19035-79-1; 84861-79-0; 190454-07-0; 39322-78-6

Form

Powder

Skin Types

●all-skin-types

Best For

General

Pregnancy & Breastfeeding Safe

Caution

Functions

Cleansing

Makes oil and water mix so dirt, makeup, and sunscreen can actually be washed away. The reason your face wash foams.

Cleansing Surfactant

Removes Impurities

The paper trail

🔬Peer-reviewednone on file

⚖️Regulatory1 listing →

🛡️Safety-assessed2 reviews →

Counts, not a verdict. A listing isn't a study. The trail, you decide.

EWG

CIR

Safe as used

Pregnancy

Caution

Concentration Guide

CIR lists it as not reported to be in use.

CIR · report published 2019

Regulatory Status

USA✔ permitted

EU⚠ restricted

JAPAN⚠ restricted

CANADA⚠ restricted

Regulatory Agencies

EWG CIR FDA EU COSING Health Canada

Verified Jun 2026

Data: CosIng · EWG · CIR