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Stearyl Heptanoate
AKA “Octadecyl heptanoate, 66009-41-4, 2M4UGL1NCN, Heptanoic acid, octadecyl ester, DTXSID9070379, RefChem:889174, DTXCID6044694, 266-065-4, Tegosoft SH”
Emollient
Ingredient Facts
Stearyl heptanoate
AKA: Octadecyl heptanoate, 66009-41-4, 2M4UGL1NCN, Heptanoic acid, Octadecyl ester, DTXSID9070379, RefChem:889174, DTXCID6044694, 266-065-4, Tegosoft SH
Emollient · Emollient · EWG: 1
Plant-Derived
Emollient
Skin Conditioner
Clean
The CIR Expert Panel concluded that the alkyl esters, listed subsequently, are safe in the present practices of use and concentration described in this safety assessment when formulated to be non-irritating.
Formula
C25H50O2
Mol. Weight
382.70
CAS #
66009-41-4
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.
Emollient
Fills in the tiny cracks between skin cells to make everything feel smooth and soft. The "silky finish" ingredient.
Locks In Moisture
Traditional Use
Synthesized as an ester combining stearyl alcohol and heptanoic acid. Developed to provide emollient and conditioning properties in modern skincare 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
Final Report on the Safety Assessment of Stearyl Heptanoate
Cosmetic Ingredient Review (CIR) Expert Panel
International Journal of Toxicology
→
Safety Assessment of Stearyl Heptanoate and Related Stearyl Alkanoates as used in Cosmetics
Cosmetic Ingredient Review (CIR) Expert Panel
International Journal of Toxicology
→
Stearyl Heptanoate
European Commission
EU Cosmetic Ingredient Database (CosIng)
→
Stearyl Heptanoate
Environmental Working Group (EWG)
EWG Skin Deep Cosmetics Database
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Safety assessment of stearyl heptanoate and related stearyl alkanoates as used in cosmetics.
Fiume MM, Bergfeld WF, Belsito DV, Hill RA, Klaassen CD et al.
International journal of toxicology, 2012
→
Safety assessment of stearyl heptanoate and related stearyl alkanoates as used in cosmetics.
Fiume MM, Bergfeld WF, Belsito DV, Hill RA, Klaassen CD et al.
International journal of toxicology, 2012
→
Safety assessment of stearyl heptanoate and related stearyl alkanoates as used in cosmetics.
Fiume MM, Bergfeld WF, Belsito DV, Hill RA, Klaassen CD et al.
International journal of toxicology, 2012
→
Safety assessment of stearyl heptanoate and related stearyl alkanoates as used in cosmetics.
Fiume MM, Bergfeld WF, Belsito DV, Hill RA, Klaassen CD et al.
International journal of toxicology, 2012
→
Safety assessment of stearyl heptanoate and related stearyl alkanoates as used in cosmetics.
Fiume MM, Bergfeld WF, Belsito DV, Hill RA, Klaassen CD et al.
International journal of toxicology, 2012
→
Safety assessment of stearyl heptanoate and related stearyl alkanoates as used in cosmetics.
Fiume MM, Bergfeld WF, Belsito DV, Hill RA, Klaassen CD et al.
International journal of toxicology, 2012
→
Safety assessment of stearyl heptanoate and related stearyl alkanoates as used in cosmetics.
Fiume MM, Bergfeld WF, Belsito DV, Hill RA, Klaassen CD et al.
International journal of toxicology, 2012
→
Verified Jun 2026
Data: PubChem · CosIng · EWG · CIR