Alpha-Endorphin

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  • Identifiers

    CAS number
    61512-76-3

    Molecular formula
    C77H120N18O26S

    SMILES
    C[C@H]([C@@H](C(=O)N[C@@H](CO)C(=O)N[C@@H](CCC(=O)O)C(=O)N[C@@H](CCCCN)C(=O)N[C@@H](CO)C(=O)N[C@@H](CCC(=O)N)C(=O)N[C@@H]([C@@H](C)O)C(=O)N1CCC[C@H]1C(=O)N[C@@H](CC(C)C)C(=O)N[C@@H](C(C)C)C(=O)N[C@@H]([C@@H](C)O)C(=O)O)NC(=O)[C@H](CCSC)NC(=O)[C@H](CC2=CC=CC=C2)NC(=O)CNC(=O)CNC(=O)[C@H](CC3=CC=C(C=C3)O)N)O

    Safety labels

  • Odor profile

    Fragrance
    Odorless 63.52%
    Savory 43.72%
    Cooling 29.9%
    Meaty 27.87%
    Fishy 23.17%
    Cooked 20.09%
    Milky 19.37%
    Sweet 17.49%
    Alcoholic 16.42%
    Bitter 15.33%

     

    Flavor
    Bitter 70.44%
    Odorless 53.84%
    Bland 35.24%
    Mild 22.41%
    Sweet-like 22.39%
    Nitrile 19.05%
    Very mild 18.59%
    Yeast 18.5%
    Cedarleaf 18.02%
    Oriental 17.88%

     

    Odor impact est.
    Low

  • Properties

    XLogP3-AA
    -9.7

    pKa est.
    -31.21 (strong acid)

    Molecular weight
    1745.9 g/mol

    Vapor pressure est.

    • hPa @ 20°C
    • hPa @ 25°C

    Evaporation rate
    Ultra slow

    Boiling point est.
    4354°C

    Flash point

    • 193.94 ˚C est.

  • Synonyms

    • alpha-ENDORPHIN
    • Endorphin, alpha
    • 61512-76-3
    • alpha Endorphin
    • RefChem:111225
    • beta-Endorphin (1-16)
    • DTXSID701029652
    • 59004-96-5
    • Lipotropin 61-76
    • MFCD00076381
    • YGGFMTSEKS QTPLVT
    • |A-Endorphin human
    • C77H120N18O26S
    • alpha -Endorphin
    • -Endorphin (human)
    • alpha-Endorphin, human
    • |A-Endorphin (human)
    • Tyr-Gly-Gly-Phe-Met-Thr-Ser-Glu-Lys-Ser-Gln-Thr-Pro-Leu-Val-Thr
    • CHEMBL255300
    • SCHEMBL29533605
    • HY-P1253
    • AKOS037645059
    • LPH(61-76)
    • alpha-Endorphin human, >=97% (HPLC)
    • AS-56652
    • FE108746
    • PD077135
    • G77856
    • Q4734927
    • |A-Endorphin (human, mouse, rat, porcine, bovine, ovine)
    • 61512-76-3

  • Applications

    Alpha-Endorphin (CAS 61512-76-3) is primarily used in pharmaceutical and biomedical research as a natural ligand for mu-opioid receptors and as a pharmacological probe in receptor binding and signaling studies of the endogenous opioid system; it also serves as an analytical reference material for peptide quantification by LC-MS and related assays; as a model peptide, it supports synthesis, characterization, and stability studies in peptide chemistry workflows; and it is commonly employed in academic and training settings to illustrate pharmacology and biochemistry concepts.

    gpt-5-nano

  • Solubility @25˚C

    Solvent Solubility (g/L)
    ethanol 5.52
    methanol 14.49
    isopropanol 2.47
    water 3.96
    ethyl acetate 1.78
    n-propanol 2.93
    acetone 8.88
    n-butanol 1.6
    acetonitrile 2.29
    DMF 48.48
    toluene 0.38
    isobutanol 1.14
    1,4-dioxane 6.92
    methyl acetate 2.85
    THF 10.99
    2-butanone 4.02
    n-pentanol 1.26
    sec-butanol 1.43
    n-hexane 0.1
    ethylene glycol 13.01
    NMP 71.35
    cyclohexane 0.11
    DMSO 61.73
    n-butyl acetate 0.87
    n-octanol 0.59
    chloroform 1.0
    n-propyl acetate 1.23
    acetic acid 39.49
    dichloromethane 1.25
    cyclohexanone 5.6
    propylene glycol 12.17
    isopropyl acetate 1.0
    DMAc 52.02
    2-ethoxyethanol 13.27
    isopentanol 0.79
    n-heptane 0.09
    ethyl formate 3.44
    1,2-dichloroethane 1.07
    n-hexanol 0.7
    2-methoxyethanol 30.19
    isobutyl acetate 0.44
    tetrachloromethane 0.31
    n-pentyl acetate 0.92
    transcutol 16.27
    n-heptanol 0.82
    ethylbenzene 0.22
    MIBK 0.86
    2-propoxyethanol 8.1
    tert-butanol 1.37
    MTBE 0.57
    2-butoxyethanol 6.55
    propionic acid 5.76
    o-xylene 0.33
    formic acid 65.07
    diethyl ether 1.06
    m-xylene 0.21
    p-xylene 0.32
    chlorobenzene 0.32
    dimethyl carbonate 4.87
    n-octane 0.06
    formamide 50.68
    cyclopentanone 12.0
    2-pentanone 2.69
    anisole 0.83
    cyclopentyl methyl ether 1.97
    gamma-butyrolactone 15.33
    1-methoxy-2-propanol 15.39
    pyridine 4.51
    3-pentanone 2.2
    furfural 18.27
    n-dodecane 0.03
    diethylene glycol 16.44
    diisopropyl ether 0.18
    tert-amyl alcohol 1.03
    acetylacetone 6.05
    n-hexadecane 0.03
    acetophenone 1.69
    methyl propionate 3.22
    isopentyl acetate 0.6
    trichloroethylene 1.99
    n-nonanol 0.64
    cyclohexanol 1.21
    benzyl alcohol 1.56
    2-ethylhexanol 0.32
    isooctanol 0.44
    dipropyl ether 0.82
    1,2-dichlorobenzene 0.29
    ethyl lactate 2.91
    propylene carbonate 4.89
    n-methylformamide 21.96
    2-pentanol 0.76
    n-pentane 0.08
    1-propoxy-2-propanol 4.37
    1-methoxy-2-propyl acetate 2.35
    2-(2-methoxypropoxy) propanol 4.16
    mesitylene 0.12
    ε-caprolactone 5.49
    p-cymene 0.12
    epichlorohydrin 7.49
    1,1,1-trichloroethane 0.44
    2-aminoethanol 11.92
    morpholine-4-carbaldehyde 45.63
    sulfolane 37.24
    2,2,4-trimethylpentane 0.02
    2-methyltetrahydrofuran 3.0
    n-hexyl acetate 0.9
    isooctane 0.01
    2-(2-butoxyethoxy)ethanol 7.99
    sec-butyl acetate 0.65
    tert-butyl acetate 0.83
    decalin 0.04
    glycerin 41.63
    diglyme 14.04
    acrylic acid 10.46
    isopropyl myristate 0.29
    n-butyric acid 4.2
    acetyl acetate 1.88
    di(2-ethylhexyl) phthalate 0.56
    ethyl propionate 1.29
    nitromethane 34.66
    1,2-diethoxyethane 1.89
    benzonitrile 0.81
    trioctyl phosphate 0.45
    1-bromopropane 0.39
    gamma-valerolactone 36.33
    n-decanol 0.45
    triethyl phosphate 0.68
    4-methyl-2-pentanol 0.3
    propionitrile 1.15
    vinylene carbonate 4.28
    1,1,2-trichlorotrifluoroethane 19.99
    DMS 1.67
    cumene 0.14
    2-octanol 0.41
    2-hexanone 1.75
    octyl acetate 0.61
    limonene 0.18
    1,2-dimethoxyethane 12.33
    ethyl orthosilicate 0.59
    tributyl phosphate 0.46
    diacetone alcohol 4.06
    N,N-dimethylaniline 0.88
    acrylonitrile 2.45
    aniline 1.21
    1,3-propanediol 11.39
    bromobenzene 0.2
    dibromomethane 0.62
    1,1,2,2-tetrachloroethane 1.95
    2-methyl-cyclohexyl acetate 0.67
    tetrabutyl urea 1.37
    diisobutyl methanol 0.14
    2-phenylethanol 0.97
    styrene 0.24
    dioctyl adipate 0.7
    dimethyl sulfate 12.31
    ethyl butyrate 0.96
    methyl lactate 10.47
    butyl lactate 2.14
    diethyl carbonate 0.64
    propanediol butyl ether 7.45
    triethyl orthoformate 1.02
    p-tert-butyltoluene 0.1
    methyl 4-tert-butylbenzoate 1.92
    morpholine 10.47
    tert-butylamine 0.43
    n-dodecanol 0.31
    dimethoxymethane 14.18
    ethylene carbonate 3.04
    cyrene 9.93
    2-ethoxyethyl acetate 2.26
    2-ethylhexyl acetate 0.45
    1,2,4-trichlorobenzene 0.51
    4-methylpyridine 2.5
    dibutyl ether 0.5
    2,6-dimethyl-4-heptanol 0.14
    DEF 6.01
    dimethyl isosorbide 5.29
    tetrachloroethylene 1.68
    eugenol 2.49
    triacetin 2.5
    span 80 3.52
    1,4-butanediol 4.92
    1,1-dichloroethane 0.62
    2-methyl-1-pentanol 0.64
    methyl formate 17.51
    2-methyl-1-butanol 0.86
    n-decane 0.07
    butyronitrile 0.93
    3,7-dimethyl-1-octanol 0.25
    1-chlorooctane 0.17
    1-chlorotetradecane 0.07
    n-nonane 0.06
    undecane 0.04
    tert-butylcyclohexane 0.02
    cyclooctane 0.05
    cyclopentanol 2.84
    tetrahydropyran 2.24
    tert-amyl methyl ether 0.62
    2,5,8-trioxanonane 9.14
    1-hexene 0.25
    2-isopropoxyethanol 4.88
    2,2,2-trifluoroethanol 18.55
    methyl butyrate 2.06

    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