Potassium C11-15 Alkyl Phosphate

AKA: Anionic surfactant

Synthetic

Cleanser

Clean

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

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

Traditional Use

A synthetic surfactant and emulsifier developed in the mid-20th century for modern cosmetics. No traditional use; created to replace plant-based and animal-derived emulsifiers with standardized synthetic alternatives.

EWG

CIR

Safe as used

Pregnancy

Caution

CIR Safety Findings

Not a Sensitizer

medical-approval

all-shades-safe

Regulatory Status

USA✔ permitted

EU⚠ restricted

JAPAN⚠ restricted

CANADA⚠ restricted

Regulatory Agencies

EWG CIR FDA EU COSING Health Canada

Skin Types

●all-skin-types

Best For

General

Pregnancy & Breastfeeding Safe

Caution

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.

Verified Jun 2026

Data: CosIng · EWG · CIR