Ammonium Myreth Sulfate

AKA: 27731-61-9, Ammonium myristyl ether sulfate

Synthetic

Cleanser

Medicated Active

Clean

Poly(oxy-1,2-ethanediyl), .alpha.-sulfo-.omega.-(tetradecyloxy)-, ammonium salt

Formula

C28H62NO5S-

Mol. Weight

524.90

CAS #

27731-61-9

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.

Foaming

Cleansing

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

Removes Impurities

Creates Lather

Cleansing Surfactant

Reduces Inflammation

Locks In Moisture

Removes dirt and impurities

Creates cleansing foam

Lifts away dirt and oil

Traditional Use

Synthesized in the mid-20th century as a polyethoxylated sulfate of myristic acid. Developed as a gentler surfactant variant for modern cosmetics with no traditional background.

EWG

CIR

Safe as used

Pregnancy

Yes

CIR Safety Findings

Not a Sensitizer

ewg-2

medical-approval

pregnancy-nursing-safe

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, gentle

Best For

General

Pregnancy & Breastfeeding Safe

Yes

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: PubChem · CosIng · EWG · CIR