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Polybutene
AKA “Polybutylene, Butylene polymer”
Ingredient
Ingredient Facts
Polybutene
AKA: Polybutylene, Butylene polymer
Ingredient · Binding · EWG: 1
Synthetic
Clean
Polybutene is the polymer formed by the polymerization of a mixture of iso- and normal butenes.
CAS #
9003-28-5, 9003-29-6
Form
Powder
See origin →
Functions
Binding
Viscosity Controlling
Holds Formula Together
Controls Viscosity
Antioxidant Protection
Reduces Inflammation
Wound Healing
Holds ingredients together
Controls product thickness
Traditional Use
A synthetic hydrocarbon polymer developed in the mid-20th century. Adopted by the cosmetics industry as an emollient and film-forming agent in skincare and cosmetic formulations.
Skin Types
●all-skin-types
Best For
Dryness
Pregnancy & Breastfeeding Safe
Yes
EWG
1
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