Cellulose Acetate Propionate

AKA: Acetate propanoate, 9004-39-1

Synthetic

Occlusive

Clean

OriginDerived from plant cellulose, typically sourced from wood pulp or cotton linters through industrial processing. Produced through acetylation and propionylation of cellulose via esterification with acetic and propionic anhydrides.

Cellulose, acetates, propanoates

Formula

C76H114O49

Mol. Weight

1811.70

CAS #

9004-39-1

Form

Powder

Skin Types

●all-skin-types, gentle

Best For

General

Pregnancy & Breastfeeding Safe

Yes

Functions

Film Forming

Creates a physical seal on skin to lock moisture in and keep irritants out. The "slugging" ingredient — barrier protection.

Creates Protective Barrier

Antioxidant Protection

Reduces Inflammation

Fights Bacteria

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.

EWG

CIR

Safe as used

Pregnancy

Yes

Regulatory Status

USA✔ permitted

EU⚠ restricted

JAPAN⚠ restricted

CANADA⚠ restricted

Regulatory Agencies

EWG CIR FDA EU COSING Health Canada

Verified Jun 2026

Data: PubChem · CosIng · EWG · CIR