C20-40 Alkyl Stearate
AKA “C20-40 Alkyl Stearate, Alkyl Stearate
Skin Conditioning
Ingredient Facts
C20-40 alkyl stearate
Skin Conditioning · Skin Conditioning · EWG: 1
Plant-Derived
Skin Conditioner
Plant Oil
Clean
C20-40 Alkyl Stearate is the ester of C20-40 alcohols and stearic acid
CAS #
222722-15-8
Form
Liquid
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.
Viscosity Controlling
Locks in moisture
Traditional Use
A synthetic fatty acid ester created for cosmetic formulations in the mid-20th century. Used to provide emollient properties and improve the spreadability of creams and lotions.
Skin Types
all-skin-types, gentle
Best For
Dryness
Pregnancy & Breastfeeding Safe
Yes
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
USApermitted
EUrestricted
JAPANrestricted
CANADArestricted
Verified Jun 2026
Data: CosIng · EWG · CIR