C18-38 Alkyl C24-54 Acid Ester

AKA: Alkyl Ester

Synthetic

Acid

Not Clean

Fatty acids, C24-54, C18-38-alkyl esters

CAS #

223706-22-7

Form

Oil

State

Solid

Functions

Viscosity Controlling

Controls Viscosity

Traditional Use

A synthetic long-chain ester created for modern cosmetic chemistry in the 20th century. Developed as a non-comedogenic emollient for premium skincare formulations.

EWG

CIR

Safe as used

Pregnancy

Yes

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

Dryness

Pregnancy & Breastfeeding Safe

Yes

The paper trail

🔬Peer-reviewed1 paper →

⚖️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