Ascorbyl Stearate
AKA “L-Ascorbic acid, 6-octadecanoate, L-Ascorbic acid monostearate, vitamin c stearate, INS NO.305, E-305, INS-305, L-ASCORBYL 6-OCTADECANOATE”
Vitamin C
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Ingredient Facts
Ascorbyl stearate
AKA: L-Ascorbic acid, 6-octadecanoate, L-Ascorbic acid monostearate, Vitamin c stearate, INS NO.305, E-305, INS-305, L-ASCORBYL 6-OCTADECANOATE
Vitamin C · Antioxidant | Skin Conditioning · EWG: 1
Synthetic
Antioxidant
Skin Conditioner
Vitamin C
Clean
A plant-derived antioxidant that helps protect skin from environmental damage and supports a brighter, more youthful complexion.
Formula
C24H42O7
Mol. Weight
442.60
CAS #
25395-66-8
Form
Liquid
State
White or yellowish, white powder with a citrus-like odour
Synthetic
Botanical. Derived from vitamin C (ascorbic acid) and stearic acid, a long-chain fatty acid from plant oils. Produced through esterification, chemically bonding ascorbic acid with stearic acid to increase stability.
Function
Antioxidant | Skin Conditioning
Benefits
Antioxidant Protection
Neutralizes Free Radicals
Traditional Use
Created as a lipid-soluble form of vitamin C in the late 20th century to improve stability and allow incorporation into emollient formulations while maintaining antioxidant activity.
Skin Types
all-skin-types, gentle
Best For
Target
Sun Damage
Melanin-Rich Skin
Suitable
Pregnancy Safe
Yes
Verified Feb 2026
Data: PubChem · CosIng · EWG · CIR