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Methyl Ethylcellulose
AKA “Ethyl Methyl Cellulose, Cellulose Ether”
Ingredient
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Ingredient Facts
Methyl ethylcellulose
AKA: Ethyl Methyl Cellulose, Cellulose Ether
Ingredient · Film Forming · EWG: 4
Synthetic
Occlusive
Not Clean
Cellulose, ethyl methyl ether
CAS #
9004-59-5
Form
Powder
See origin →
Functions
Binding
Film Forming
Creates a physical seal on skin to lock moisture in and keep irritants out. The "slugging" ingredient — barrier protection.
Viscosity Controlling
Holds Formula Together
Creates Protective Barrier
Controls Viscosity
Anti-Aging Benefits
Antioxidant Protection
Reduces Inflammation
Creates protective layer
Holds ingredients together
Controls product thickness
Traditional Use
A semi-synthetic polymer created in the early-to-mid 20th century. Developed to provide film-forming and thickening properties in cosmetics as a cellulose alternative.
Skin Types
●all-skin-types
Best For
General
Pregnancy & Breastfeeding Safe
Yes
EWG
4
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
Verified Jun 2026
Data: CosIng · EWG · CIR