Ascorbyl Stearate

AKA: L-Ascorbic acid, 6-octadecanoate, L-Ascorbic acid monostearate, Vitamin c stearate, INS NO.305, E-305, L-ASCORBYL 6-OCTADECANOATE, ASCORBYL STEARATE [USP-RS], STEARIC ACID, 6-ESTER WITH L-ASCORBIC ACID
Plant-Derived
Antioxidant
Clean
OriginDerived 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.
Ascorbyl stearate is a fatty acid ester.
Formula
C24H42O7
Mol. Weight
442.60
CAS #
25395-66-8
Form
Liquid
Skin Types
●all-skin-types, gentle
Best For
Sun Damage
Pregnancy & Breastfeeding Safe
Yes
Functions
Antioxidant
Fights free radicals — the unstable molecules from UV, pollution, and stress that break down collagen and cause premature aging.
Neutralizes Free Radicals
The paper trail
🔬Peer-reviewednone on file
⚖️Regulatory1 listing →
🛡️Safety-assessed4 reviews →
Counts, not a verdict. A listing isn't a study. The trail, you decide.
Verified Jun 2026
Data: PubChem · CosIng · EWG · CIR
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