Hypotaurine

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  • Identifiers

    CAS number
    300-84-5

    Molecular formula
    C2H7NO2S

    SMILES
    C(CS(=O)O)N

    Safety labels

    Irritant
    Irritant

  • Odor profile

    Fragrance
    Odorless 62.21%
    Meaty 37.57%
    Sulfurous 34.88%
    Savory 32.56%
    Fishy 26.07%
    Cooked 25.48%
    Roasted 21.55%
    Cheesy 20.71%
    Pungent 20.45%
    Onion 18.71%

     

    Flavor
    Odorless 47.73%
    Sulfury 29.95%
    Mild 28.78%
    Bitter 27.24%
    Sulfurous 25.96%
    Bland 24.3%
    Roasted 21.51%
    Yeast 20.95%
    Formyl 20.88%
    Mousy 20.73%

     

    Odor impact est.
    High

  • Properties

    XLogP3-AA
    -1.5

    pKa est.
    5.82 (weak acid)

    Molecular weight
    109.15 g/mol

    Vapor pressure est.

    • hPa @ 20°C
    • hPa @ 25°C

    Evaporation rate
    Ultra slow

    Boiling point est.
    297°C

    Flash point

    • 133.75 ˚C est.

  • Synonyms

    • hypotaurine
    • 300-84-5
    • 2-Aminoethanesulfinic acid
    • Ethanesulfinic acid, 2-amino-
    • 2-aminoethane-1-sulfinic acid
    • DTXSID8075380
    • aminoethanesulfinic acid
    • 5L08GE4332
    • CHEBI:16668
    • DTXSID60861856
    • 2-azaniumylethanesulfinate
    • RefChem:147481
    • DTXCID1038113
    • DTXCID60212723
    • 428-720-4
    • 627-467-9
    • 2-Aminoethylsulfinic acid
    • Cystaminesulfinic acid
    • MFCD00038197
    • Cystaminesulfinate
    • UNII-5L08GE4332
    • 2-Aminoethylsulfinic Acid; 2-Aminoethanesulfinic Acid2-Aminoethylsulfinic AcidCystaminesulfinic Acid
    • 2-Aminoethylsulfinate
    • Tocris-0208
    • 2-amino-Ethanesulfinate
    • Lopac-H-1384
    • bmse000452
    • Taurolithocholic Impurity 9
    • 2-amino-Ethanesulfinic acid
    • Lopac0_000573
    • 2-aminoethane-1-sulfinicacid
    • SCHEMBL154548
    • orb1301980
    • Hypotaurine, >=98% (TLC)
    • CHEMBL1256480
    • SCHEMBL15177935
    • HMS3261D08
    • Tox21_500573
    • HB2656
    • AKOS006340932
    • CCG-204662
    • CS-6985
    • EBC-615934
    • LP00573
    • SDCCGSBI-0050555.P002
    • NCGC00015499-01
    • NCGC00015499-02
    • NCGC00015499-03
    • NCGC00015499-04
    • NCGC00015499-05
    • NCGC00024496-01
    • NCGC00024496-02
    • NCGC00024496-03
    • NCGC00261258-01
    • NCGC00371406-03
    • (S~1~S)-2-Aminoethane-1-sulfinic acid
    • AS-60017
    • SY112951
    • HY-100803
    • EU-0100573
    • NS00013350
    • C00519
    • F85538
    • H 1384
    • EN300-7572077
    • F787630
    • SR-01000075902
    • Q3138539
    • SR-01000075902-1
    • BFE65B28-22CA-40B8-A677-2A9C0E17D0D0
    • 300-84-5

  • Applications

    Hypotaurine (CAS 300-84-5) is primarily used as an intermediate in the synthesis of taurine and related sulfur-containing compounds, supporting pharmaceutical and biochemical manufacturing. It also functions as a chemical reagent and building block in various organic syntheses in industrial manufacturing. In cosmetics and personal care, hypotaurine is commonly evaluated as an antioxidant and reactive oxygen species scavenger to help stabilize formulations and protect sensitive ingredients. In research and development settings, it is used as a biochemical reagent in enzyme assays and cell-based studies.

    gpt-5-nano

  • Solubility @25˚C

    Solvent Solubility (g/L)
    ethanol 7.47
    methanol 34.79
    isopropanol 1.88
    water 447.48
    ethyl acetate 1.1
    n-propanol 3.41
    acetone 10.13
    n-butanol 1.79
    acetonitrile 2.58
    DMF 50.71
    toluene 0.3
    isobutanol 1.74
    1,4-dioxane 3.89
    methyl acetate 1.77
    THF 10.79
    2-butanone 2.47
    n-pentanol 1.29
    sec-butanol 1.17
    n-hexane 0.1
    ethylene glycol 67.33
    NMP 106.83
    cyclohexane 0.23
    DMSO 101.15
    n-butyl acetate 2.23
    n-octanol 1.34
    chloroform 0.28
    n-propyl acetate 1.45
    acetic acid 91.41
    dichloromethane 0.42
    cyclohexanone 9.06
    propylene glycol 30.41
    isopropyl acetate 1.04
    DMAc 33.61
    2-ethoxyethanol 12.36
    isopentanol 1.44
    n-heptane 0.33
    ethyl formate 3.59
    1,2-dichloroethane 0.58
    n-hexanol 2.91
    2-methoxyethanol 29.99
    isobutyl acetate 1.08
    tetrachloromethane 0.27
    n-pentyl acetate 1.83
    transcutol 25.36
    n-heptanol 2.58
    ethylbenzene 0.19
    MIBK 2.09
    2-propoxyethanol 14.98
    tert-butanol 2.84
    MTBE 0.47
    2-butoxyethanol 10.38
    propionic acid 16.2
    o-xylene 0.59
    formic acid 223.39
    diethyl ether 0.38
    m-xylene 0.53
    p-xylene 0.34
    chlorobenzene 0.47
    dimethyl carbonate 2.3
    n-octane 0.12
    formamide 142.82
    cyclopentanone 16.5
    2-pentanone 2.28
    anisole 0.87
    cyclopentyl methyl ether 2.71
    gamma-butyrolactone 22.72
    1-methoxy-2-propanol 13.36
    pyridine 2.47
    3-pentanone 1.72
    furfural 28.05
    n-dodecane 0.09
    diethylene glycol 37.18
    diisopropyl ether 0.31
    tert-amyl alcohol 2.06
    acetylacetone 7.07
    n-hexadecane 0.1
    acetophenone 2.82
    methyl propionate 1.98
    isopentyl acetate 1.9
    trichloroethylene 1.0
    n-nonanol 1.35
    cyclohexanol 2.66
    benzyl alcohol 2.43
    2-ethylhexanol 1.64
    isooctanol 1.94
    dipropyl ether 1.3
    1,2-dichlorobenzene 0.64
    ethyl lactate 5.11
    propylene carbonate 8.7
    n-methylformamide 31.95
    2-pentanol 0.81
    n-pentane 0.1
    1-propoxy-2-propanol 9.43
    1-methoxy-2-propyl acetate 4.76
    2-(2-methoxypropoxy) propanol 11.66
    mesitylene 0.6
    ε-caprolactone 7.59
    p-cymene 0.73
    epichlorohydrin 4.85
    1,1,1-trichloroethane 0.34
    2-aminoethanol 45.9
    morpholine-4-carbaldehyde 49.7
    sulfolane 66.74
    2,2,4-trimethylpentane 0.1
    2-methyltetrahydrofuran 3.04
    n-hexyl acetate 2.11
    isooctane 0.1
    2-(2-butoxyethoxy)ethanol 13.66
    sec-butyl acetate 0.83
    tert-butyl acetate 2.11
    decalin 0.14
    glycerin 95.34
    diglyme 19.26
    acrylic acid 32.26
    isopropyl myristate 1.11
    n-butyric acid 9.3
    acetyl acetate 2.01
    di(2-ethylhexyl) phthalate 3.67
    ethyl propionate 1.16
    nitromethane 51.95
    1,2-diethoxyethane 1.94
    benzonitrile 1.68
    trioctyl phosphate 2.53
    1-bromopropane 0.16
    gamma-valerolactone 34.19
    n-decanol 1.08
    triethyl phosphate 2.17
    4-methyl-2-pentanol 0.94
    propionitrile 1.01
    vinylene carbonate 7.74
    1,1,2-trichlorotrifluoroethane 24.57
    DMS 2.69
    cumene 0.3
    2-octanol 1.06
    2-hexanone 1.65
    octyl acetate 1.75
    limonene 1.12
    1,2-dimethoxyethane 7.32
    ethyl orthosilicate 1.84
    tributyl phosphate 2.56
    diacetone alcohol 9.0
    N,N-dimethylaniline 1.49
    acrylonitrile 2.61
    aniline 1.62
    1,3-propanediol 21.55
    bromobenzene 0.26
    dibromomethane 0.26
    1,1,2,2-tetrachloroethane 0.9
    2-methyl-cyclohexyl acetate 3.17
    tetrabutyl urea 4.88
    diisobutyl methanol 1.25
    2-phenylethanol 3.3
    styrene 0.2
    dioctyl adipate 2.86
    dimethyl sulfate 10.55
    ethyl butyrate 2.08
    methyl lactate 11.7
    butyl lactate 5.56
    diethyl carbonate 1.51
    propanediol butyl ether 12.85
    triethyl orthoformate 2.04
    p-tert-butyltoluene 0.79
    methyl 4-tert-butylbenzoate 7.4
    morpholine 5.8
    tert-butylamine 1.05
    n-dodecanol 0.88
    dimethoxymethane 6.7
    ethylene carbonate 4.87
    cyrene 26.3
    2-ethoxyethyl acetate 3.08
    2-ethylhexyl acetate 1.44
    1,2,4-trichlorobenzene 1.03
    4-methylpyridine 1.75
    dibutyl ether 0.61
    2,6-dimethyl-4-heptanol 1.25
    DEF 5.29
    dimethyl isosorbide 19.14
    tetrachloroethylene 1.25
    eugenol 10.18
    triacetin 6.54
    span 80 13.09
    1,4-butanediol 10.44
    1,1-dichloroethane 0.19
    2-methyl-1-pentanol 1.14
    methyl formate 19.2
    2-methyl-1-butanol 1.44
    n-decane 0.13
    butyronitrile 0.91
    3,7-dimethyl-1-octanol 1.39
    1-chlorooctane 0.32
    1-chlorotetradecane 0.21
    n-nonane 0.12
    undecane 0.1
    tert-butylcyclohexane 0.13
    cyclooctane 0.13
    cyclopentanol 5.8
    tetrahydropyran 1.42
    tert-amyl methyl ether 0.64
    2,5,8-trioxanonane 19.42
    1-hexene 0.18
    2-isopropoxyethanol 5.86
    2,2,2-trifluoroethanol 41.26
    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