Potassium C9-15 Alkyl Phosphate

Potassium C9-15 Alkyl Phosphate molecular structure
molecular structure · PubChem
AKA: Anionic surfactant
Synthetic
Cleanser
Not Clean
Potassium salt of a complex mixture of esters of synthetic C9-15 alcohols with phosphoric acid
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 from mid-20th century development. No traditional use; engineered to replace natural soap and plant-derived emulsifiers in standardized cosmetic formulations.
EWG
4
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
Skin Types
●all-skin-types
Best For
General
Pregnancy & Breastfeeding Safe
Caution
The paper trail
🔬Peer-reviewednone on file
⚖️Regulatory1 listing →
🛡️Safety-assessed1 review →
Counts, not a verdict. A listing isn't a study. The trail, you decide.
Verified Jun 2026
Data: CosIng · EWG · CIR