Ascorbyl stearate is a fatty acid ester.
Definition
US FDA substance register · UNII 7Z1QT341US · registered name ASCORBYL STEARATE · single chemical substance
Ascorbyl stearate is a fatty acid ester.
Source: PubChem
Cosmetic roles
Safety & regulatory references
Other restriction: ban substances that deplete the ozone layer
Source: EU CosIng ingredient list
Reviewed by CIR: Safety Assessment of Ethers and Esters of Ascorbic Acid as Used in Cosmetics
Reviewed by CIR: Final Report on the Safety Assessment of Ascorbyl Palmitate, Ascorbyl Dipalmitate, Ascorbyl Stearate, Erythorbic Acid, and Sodium Erythorbate
More data — names, identifiers, properties, test records, literature
Official labels & definitions
JCIA labelling name ステアリン酸アスコルビル: 本品は、ステアリン酸（＊）とアスコルビン酸（＊）のモノエステルであり、次の化学式で表される。
Source: JCIA labelling names (Japan)
Names & identifiers
- CAS No.chemical registry number
- 25395-66-8
- EC No.EU chemical inventory number
- 246-944-9
- DTXSIDUS EPA chemical ID
- DTXSID00894148
- DTXCIDUS EPA compound ID
- DTXCID801324188
- IUPAC
- (2S)-2-[(2R)-3,4-Dihydroxy-5-oxo-2,5-dihydrofuran-2-yl]-2-hydroxyethyl octadecanoate (non-preferred name)
- Molecular formula
- C24H42O7
- Molecular weight
- 442.593 g/mol
Measured properties
- Appearance
- White or yellowish, white powder with a citrus-like odour
Values measured on the substance itself, not a specification for a commercial raw material.
Source: PubChem
What products actually use it for
What the 3 products reported to the US EPA with this ingredient use it for. Products outside cosmetics are included, so the top few rows are its main uses.
- Antioxidant2
- Processing aids not otherwise specified1
Source: US EPA CompTox dashboard
Related literature
- Hydrothermal Synthesis of a Solid Acid Catalyst Based on Bromosodalite and Its Application in Esterification · 2026
- Final Report of the Safety Assessment of L-Ascorbic Acid, Calcium Ascorbate, Magnesium Ascorbate, Magnesium Ascorbyl Phosphate, Sodium Ascorbate, and Sodium Ascorbyl Phosphate as Used in Cosmetics1 · 2005
- Final Report on the Safety Assessment of Ascorbyl Palmitate, Ascorbyl Dipalmitate, Ascorbyl Stearate, Erythorbic Acid, and sodium Erythorbate · 1999
Linked databases 13
- Australian Industrial Chemicals Inventory (AICIS)
- China inventory of existing ingredients (IECIC)
- EU CosIng ingredient list 2
- JCIA labelling names (Japan)
- Korea Cosmetic Association ingredient dictionary
- MFDS (Korea) cosmetic ingredient register 2
- PubChem 2
- Tlooto literature search 2 3
- UniChem cross-reference IDs
- US Cosmetic Ingredient Review (CIR) 2 3
- US EPA CompTox dashboard 2
- US EPA DSSTox chemical database
- US FDA Unique Ingredient Identifier (UNII)