Ascorbyl Stearate

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  • Identifiers

    CAS number
    10605-09-1

    Molecular formula
    C24H42O7

    SMILES
    CCCCCCCCCCCCCCCCCC(=O)OC[C@@H]([C@@H]1C(=C(C(=O)O1)O)O)O

    Safety labels

  • Properties

    XLogP3-AA
    7.3

    Molecular weight
    442.6 g/mol

  • Synonyms

    • Ascorbyl stearate
    • L-Ascorbic acid, 6-octadecanoate
    • L-Ascorbic acid monostearate
    • vitamin c stearate
    • INS NO.305
    • E-305
    • INS-305
    • L-ASCORBYL 6-OCTADECANOATE
    • ASCORBYL STEARATE [USP-RS]
    • STEARIC ACID, 6-ESTER WITH L-ASCORBIC ACID
    • ASCORBYL STEARATE (USP-RS)
    • L-Ascorbic acid, 6-octadecanoate (9CI)
    • RefChem:560185
    • ASCORBYL STEARATE [INCI]
    • 246-944-9
    • 2-(3,4-dihydroxy-5-oxo-2,5-dihydrofuran-2-yl)-2-hydroxyethyl octadecanoate
    • L-Ascorbyl 6-Stearate
    • 10605-09-1
    • 25395-66-8
    • L-Ascorbic acid 6-stearate
    • (S)-2-((R)-3,4-dihydroxy-5-oxo-2,5-dihydrofuran-2-yl)-2-hydroxyethyl stearate
    • 6-O-Stearoyl-L-ascorbic Acid
    • L-Ascorbicacid6-stearate
    • 7Z1QT341US
    • [(2S)-2-[(2R)-3,4-dihydroxy-5-oxo-2H-furan-2-yl]-2-hydroxyethyl] octadecanoate
    • MFCD00059739
    • 6-(Stearoyloxy)-L-ascorbic acid
    • L-ASCORBIC ACID, 6-STEARATE
    • (2S)-2-[(2R)-3,4-dihydroxy-5-oxo-2,5-dihydrofuran-2-yl]-2-hydroxyethyl octadecanoate
    • UNII-7Z1QT341US
    • EINECS 234-231-5
    • 6-Ascorbyl stearate
    • L-Ascorbyl-6-stearate
    • L-Stearoyl-6-ascorbic Acid
    • SCHEMBL16202
    • CHEMBL218804
    • DTXSID00894148
    • CHEBI:138822
    • LITUBCVUXPBCGA-WMZHIEFXSA-N
    • AKOS022172048
    • HY-W127738
    • BP-44439
    • E305
    • FS163221
    • A0617
    • CS-0185932
    • C20340
    • D88295
    • 395A668
    • Q286793
    • L-Ascorbic acid 6-stearate, analytical reference material
    • [(2S)-2-[(2R)-3,4-dihydroxy-5-oxo-2H-furan-2-yl]-2-hydroxy-ethyl] octadecanoate
    • 25395-66-8

  • Applications

    Ascorbyl stearate (CAS 10605-09-1) is a fat-soluble derivative of vitamin C used across several industries as an antioxidant and functional additive. In cosmetics and personal care it serves as a lipid-soluble antioxidant and skin-conditioning emollient in oil- and lotion-based formulations. In food processing it may be employed as an oil-soluble antioxidant to stabilize fats and oils and extend shelf life. In industrial materials it acts as an antioxidant/stabilizer for polymers and coatings, helping to reduce oxidative degradation and color fading. In coatings and inks it can provide formulation stability by limiting oxidation of oil-based components. In pharmaceutical contexts it may function as a lipid-based vitamin C source or excipient within certain formulations, subject to regulatory limits.

    gpt-5-nano

1 3

IFRA standard 51

Recommendation
No restriction
Maximum acceptable concentrations in the finished product (%)
Category 1
Products applied to the lips
 No restriction Category 7A
Rinse-off products applied to the hair with some hand contact
 No restriction
Category 2
Products applied to the axillae
 No restriction Category 7B
Leave-on products applied to the hair with some hand contact
 No restriction
Category 3
Products applied to the face/body using fingertips
 No restriction Category 8
Products with significant anogenital exposure
 No restriction
Category 4
Products related to fine fragrance
 No restriction Category 9
Products with body and hand exposure, primarily rinse off
 No restriction
Category 5A
Body lotion products applied to the body using the hands (palms), primarily leave on
 No restriction Category 10A
Household care products with mostly hand contact
 No restriction
Category 5B
Face moisturizer products applied to the face using the hands (palms), primarily leave on
 No restriction Category 10B
Household care products with mostly hand contact, including aerosol/spray products (with potential leave-on skin contact)
 No restriction
Category 5C
Hand cream products applied to the hands using the hands (palms), primarily leave on
 No restriction Category 11A
Products with intended skin contact but minimal transfer of fragrance to skin from inert substrate without UV exposure
 No restriction
Category 5D
Baby Creams, baby Oils and baby talc
 No restriction Category 11B
Products with intended skin contact but minimal transfer of fragrance to skin from inert substrate with potential UV exposure
 No restriction
Category 6
Products with oral and lip exposure
 No restriction Category 12
Products not intended for direct skin contact, minimal or insignificant transfer to skin
 No restriction