Acetyl-L-Carnitine

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  • Identifiers

    CAS number
    3040-38-8

    Molecular formula
    C9H17NO4

    SMILES
    CC(=O)O[C@H](CC(=O)[O-])C[N+](C)(C)C

    Safety labels

  • Odor profile

    Fragrance
    Fruity 46.83%
    Odorless 36.88%
    Sour 26.29%
    Musk 26.14%
    Grape 24.35%
    Fatty 23.89%
    Sweet 23.19%
    Floral 22.95%
    Milky 20.72%
    Creamy 20.37%

     

    Flavor
    Fruity 38.31%
    Odorless 31.01%
    Mild 27.66%
    Bland 26.2%
    Tropical 20.82%
    Stinky 19.93%
    Bitter 19.6%
    Dried berry 19.2%
    Acrid 19.06%
    Heather 19.0%

     

    Odor impact est.
    Low

  • Properties

    XLogP3-AA
    0.4

    pKa est.
    4.39 (weak acid)

    Molecular weight
    203.24 g/mol

    Melting point expt.

    • 145°C

    Flash point

    • -115.01 ˚C est.

    Solubility expt.

    • Very soluble in water and alcohol.

  • Synonyms

    • Acetyl-L-carnitine
    • acetylcarnitine
    • 3040-38-8
    • O-Acetyl-L-carnitine
    • Levocarnitine acetyl
    • (R)-Acetylcarnitine
    • (-)-Acetylcarnitine
    • ALCAR
    • L-O-Acetylcarnitine
    • R-Acetylcarnitine
    • Nicetile
    • L-Acetyl carnitine
    • L-Carnitine acetyl ester
    • Acetyl-L-(-)-carnitine
    • Acetylcarnitine, L-
    • (3R)-3-acetyloxy-4-(trimethylazaniumyl)butanoate
    • Normobren
    • Oristar ach
    • 6DH1W9VH8Q
    • Zibren
    • ORISTAR ACC
    • DTXSID1040956
    • CHEBI:57589
    • ST-200
    • (2R)-2-(Acetyloxy)-3-carboxy-N,N,N-trimethyl-1-propanaminium inner salt
    • L-(3-carboxy-2-hydroxypropyl)trimethylammonium hydroxide inner salt acetate
    • NSC-747431
    • Carnitine, Acetyl
    • Acetyl L Carnitine
    • RefChem:67044
    • DTXCID9020956
    • 1-Propanaminium, 2-(acetyloxy)-3-carboxy-N,N,N-trimethyl-, inner salt
    • 3-acetyloxy-4-(trimethylazaniumyl)butanoate
    • L-ACETYLCARNITINE
    • O-acetylcarnitine
    • acetyl l-carnitine
    • (3R)-3-(acetyloxy)-4-(trimethylazaniumyl)butanoate
    • Acetyl carnitine
    • (R)-3-acetoxy-4-(trimethylammonio)butanoate
    • Carnitine, acetyl-, L-
    • UNII-6DH1W9VH8Q
    • acetyl-carnitine
    • HSDB 7587
    • (-)O-acetylcarnitine
    • (+-)-Acetylcarnitine
    • O-acetyl-(R)-carnitine
    • VITAMIN BT, ACETATE
    • ACETYLCARNITINE [MI]
    • SCHEMBL118455
    • ACETYLCARNITINE [VANDF]
    • GTPL4520
    • ACETYLCARNITINE [WHO-DD]
    • CHEMBL1697733
    • MSK2381
    • ACETYL-L-CARNITINE [HSDB]
    • GLXC-20467
    • EBC-26192
    • EX-A15205
    • LMFA07070050
    • AKOS040747759
    • DB08842
    • 1-Propanaminium, 2-(acetyloxy)-3-carboxy-N,N,N-trimethyl-, hydroxide, inner salt, (R)-
    • 1-Propanaminium, 2-(acetyloxy)-3-carboxy-N,N,N-trimethyl-, inner salt, (2R)-
    • CS-0059334
    • G78330
    • Q311992
    • Ammonium, (3-carboxy-2-hydroxypropyl)trimethyl-, hydroxide, inner salt, acetate, L-
    • 3040-38-8

  • Applications

    Acetyl-L-Carnitine (CAS 3040-38-8) is primarily used as a pharmaceutical and nutraceutical ingredient in dietary supplements to support energy metabolism in humans; it is also considered as an animal feed additive to support fat metabolism in animal nutrition. In cosmetics and personal care, it is studied as a conditioning ingredient. In laboratory and chemical manufacturing, it can serve as an intermediate or reference standard for synthesis and analytical methods.

    gpt-5-nano

  • Solubility @25˚C

    Solvent Solubility (g/L)
    ethanol 130.58
    methanol 581.61
    isopropanol 16.31
    water 904.34
    ethyl acetate 7.45
    n-propanol 43.44
    acetone 6.33
    n-butanol 16.01
    acetonitrile 16.29
    DMF 145.78
    toluene 1.49
    isobutanol 12.01
    1,4-dioxane 35.02
    methyl acetate 13.0
    THF 41.9
    2-butanone 4.48
    n-pentanol 6.55
    sec-butanol 10.14
    n-hexane 0.27
    ethylene glycol 380.99
    NMP 453.71
    cyclohexane 0.52
    DMSO 56.27
    n-butyl acetate 7.62
    n-octanol 6.3
    chloroform 17.14
    n-propyl acetate 6.03
    acetic acid 648.01
    dichloromethane 26.77
    cyclohexanone 23.78
    propylene glycol 211.73
    isopropyl acetate 2.87
    DMAc 130.15
    2-ethoxyethanol 58.51
    isopentanol 4.46
    n-heptane 0.47
    ethyl formate 37.57
    1,2-dichloroethane 8.66
    n-hexanol 10.38
    2-methoxyethanol 266.0
    isobutyl acetate 3.73
    tetrachloromethane 2.88
    n-pentyl acetate 5.75
    transcutol 105.3
    n-heptanol 7.19
    ethylbenzene 1.59
    MIBK 1.57
    2-propoxyethanol 81.48
    tert-butanol 7.71
    MTBE 1.31
    2-butoxyethanol 38.76
    propionic acid 159.64
    o-xylene 3.0
    formic acid 2189.06
    diethyl ether 2.13
    m-xylene 1.99
    p-xylene 2.38
    chlorobenzene 4.0
    dimethyl carbonate 19.92
    n-octane 0.2
    formamide 994.9
    cyclopentanone 35.58
    2-pentanone 2.61
    anisole 5.79
    cyclopentyl methyl ether 9.25
    gamma-butyrolactone 150.35
    1-methoxy-2-propanol 65.5
    pyridine 22.74
    3-pentanone 2.83
    furfural 193.03
    n-dodecane 0.19
    diethylene glycol 171.49
    diisopropyl ether 0.38
    tert-amyl alcohol 7.15
    acetylacetone 7.87
    n-hexadecane 0.2
    acetophenone 13.21
    methyl propionate 17.31
    isopentyl acetate 5.58
    trichloroethylene 21.14
    n-nonanol 5.58
    cyclohexanol 13.59
    benzyl alcohol 15.74
    2-ethylhexanol 4.49
    isooctanol 4.4
    dipropyl ether 3.23
    1,2-dichlorobenzene 7.57
    ethyl lactate 24.24
    propylene carbonate 76.68
    n-methylformamide 263.21
    2-pentanol 3.2
    n-pentane 0.25
    1-propoxy-2-propanol 30.9
    1-methoxy-2-propyl acetate 18.85
    2-(2-methoxypropoxy) propanol 39.84
    mesitylene 1.32
    ε-caprolactone 58.73
    p-cymene 2.47
    epichlorohydrin 57.4
    1,1,1-trichloroethane 3.48
    2-aminoethanol 374.81
    morpholine-4-carbaldehyde 286.42
    sulfolane 169.05
    2,2,4-trimethylpentane 0.19
    2-methyltetrahydrofuran 14.87
    n-hexyl acetate 9.48
    isooctane 0.08
    2-(2-butoxyethoxy)ethanol 52.09
    sec-butyl acetate 2.7
    tert-butyl acetate 3.18
    decalin 0.45
    glycerin 470.9
    diglyme 61.26
    acrylic acid 268.22
    isopropyl myristate 2.61
    n-butyric acid 62.76
    acetyl acetate 9.17
    di(2-ethylhexyl) phthalate 12.7
    ethyl propionate 7.38
    nitromethane 237.43
    1,2-diethoxyethane 6.21
    benzonitrile 12.03
    trioctyl phosphate 6.81
    1-bromopropane 2.09
    gamma-valerolactone 156.54
    n-decanol 3.81
    triethyl phosphate 9.47
    4-methyl-2-pentanol 1.43
    propionitrile 9.4
    vinylene carbonate 102.99
    1,1,2-trichlorotrifluoroethane 190.14
    DMS 21.16
    cumene 1.84
    2-octanol 2.97
    2-hexanone 2.59
    octyl acetate 5.48
    limonene 2.85
    1,2-dimethoxyethane 31.75
    ethyl orthosilicate 7.46
    tributyl phosphate 8.31
    diacetone alcohol 12.56
    N,N-dimethylaniline 8.13
    acrylonitrile 28.67
    aniline 10.54
    1,3-propanediol 185.28
    bromobenzene 2.48
    dibromomethane 9.41
    1,1,2,2-tetrachloroethane 16.95
    2-methyl-cyclohexyl acetate 12.05
    tetrabutyl urea 13.33
    diisobutyl methanol 1.79
    2-phenylethanol 16.42
    styrene 1.5
    dioctyl adipate 8.87
    dimethyl sulfate 50.51
    ethyl butyrate 7.56
    methyl lactate 65.58
    butyl lactate 20.92
    diethyl carbonate 8.18
    propanediol butyl ether 53.19
    triethyl orthoformate 8.17
    p-tert-butyltoluene 2.32
    methyl 4-tert-butylbenzoate 23.19
    morpholine 73.68
    tert-butylamine 3.07
    n-dodecanol 2.66
    dimethoxymethane 35.65
    ethylene carbonate 57.88
    cyrene 89.04
    2-ethoxyethyl acetate 12.98
    2-ethylhexyl acetate 5.03
    1,2,4-trichlorobenzene 12.3
    4-methylpyridine 13.14
    dibutyl ether 2.02
    2,6-dimethyl-4-heptanol 1.79
    DEF 20.51
    dimethyl isosorbide 71.78
    tetrachloroethylene 15.85
    eugenol 35.34
    triacetin 28.76
    span 80 42.72
    1,4-butanediol 46.0
    1,1-dichloroethane 3.16
    2-methyl-1-pentanol 3.18
    methyl formate 154.51
    2-methyl-1-butanol 7.04
    n-decane 0.3
    butyronitrile 6.45
    3,7-dimethyl-1-octanol 3.8
    1-chlorooctane 1.26
    1-chlorotetradecane 0.59
    n-nonane 0.26
    undecane 0.23
    tert-butylcyclohexane 0.36
    cyclooctane 0.24
    cyclopentanol 27.85
    tetrahydropyran 9.28
    tert-amyl methyl ether 1.94
    2,5,8-trioxanonane 53.33
    1-hexene 0.86
    2-isopropoxyethanol 18.09
    2,2,2-trifluoroethanol 301.8
    methyl butyrate 10.85

    Scent© AI

1 4

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