Potassium C12-13 Alkyl Phosphate

AKA: Anionic surfactant, Soap

Synthetic

Cleanser

Clean

OriginDerived from C12-13 fatty alcohols and phosphoric acid, typically sourced from petroleum or plant-based hydrocarbons. Synthesized through esterification of phosphoric acid with mixed-chain alcohols, followed by potassium salt formation.

Potassium salt of a complex mixture of esters of phosphoric acid and C12-13 alcohols

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

Leave-onNot reported

Rinse-off6.5%

0%50%100%

CIR reported use · 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