Carboxymethyl Cellulose Acetate Butyrate

Carboxymethyl Cellulose Acetate Butyrate 1
Carboxymethyl Cellulose Acetate Butyrate 2
AKA: Cellulose Acetate Butyrate Carboxylate, Cellulose Ester
Synthetic
Occlusive
Emulsifier
Clean
Carboxymethyl Cellulose Acetate Butyrate is the product obtained by the reaction of butyric and acetic anhydrides with carboxymethyl cellulose
CAS #
9050-04-8
Form
Powder
Functions
Emulsion Stabilising
Forces oil and water to stay mixed instead of separating into layers. The unsung hero holding your lotion together.
Film Forming
Creates a physical seal on skin to lock moisture in and keep irritants out. The "slugging" ingredient — barrier protection.
Viscosity Controlling
Stabilizes Emulsion
Creates Protective Barrier
Controls Viscosity
Antioxidant Protection
Reduces Inflammation
Locks In Moisture
Creates protective layer
Keeps product blended
Controls product thickness
Traditional Use
A semi-synthetic derivative of cellulose created in the mid-20th century as a film-forming and texturizing agent. Developed to replace natural gums while providing superior water resistance and stability.
EWG
1
CIR
Safe as used
Pregnancy
Yes
CIR Safety Findings
Not a Sensitizer
ewg-1
medical-approval
pregnancy-nursing-safe
all-shades-safe
Regulatory Status
USA✔ permitted
EU⚠ restricted
JAPAN⚠ restricted
CANADA⚠ restricted
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: CosIng · EWG · CIR