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Polydecene
AKA “Decene polymer, Polydecene”
Skin Conditioning
Ingredient Facts
Polydecene
AKA: Decene polymer
Skin Conditioning · Skin Conditioning · EWG: 1
Synthetic
Skin Conditioner
Clean
Homopolymer of decene
CAS #
37309-58-3, 25189-70-2
Form
Oil
See origin →
Functions
Skin Conditioning
A catch-all term for ingredients that improve how skin looks and feels — softer, smoother, more supple. The workhorse behind most moisturizers.
Locks in moisture
Traditional Use
A synthetic hydrocarbon polymer created in the mid-20th century. Used in cosmetics as an emollient and texture modifier to provide slip and spreadability in creams, oils, and makeup 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