DL-Cysteine

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  • Identifiers

    CAS number
    3374-22-9

    Molecular formula
    C3H7NO2S

    SMILES
    C(C(C(=O)O)N)S

  • Odor profile

    Fragrance
    Odorless 59.32%
    Sulfurous 59.21%
    Meaty 48.38%
    Savory 40.61%
    Roasted 27.81%
    Cooked 27.08%
    Onion 23.08%
    Cheesy 22.32%
    Garlic 20.36%
    Alliaceous 19.99%

     

    Flavor
    Odorless 60.57%
    Sulfury 34.8%
    Mild 34.2%
    Sulfurous 26.42%
    Bland 25.4%
    Cooked 23.3%
    Yeast 22.79%
    Roasted 22.73%
    Faint 22.21%
    Sweet-like 21.89%

     

    Odor impact est.
    High

  • Properties

    XLogP3-AA
    -2.5

    pKa est.
    6.75 (neutral)

    Molecular weight
    121.16 g/mol

    Vapor pressure est.

    • hPa @ 20°C
    • hPa @ 25°C

    Evaporation rate
    Ultra slow

    Boiling point est.
    277°C

    Flash point

    • 134.28 ˚C est.

  • Synonyms

    • DL-Cysteine
    • 3374-22-9
    • 2-Amino-3-mercaptopropanoic acid
    • DL-Cystein
    • 2-amino-3-sulfanylpropanoic acid
    • CYSTEINE, DL-
    • (+/-)-2-Amino-3-mercaptopropionic acid
    • 150146-94-4
    • MFCD00004881
    • 5CM45Q5YAF
    • L-HSCH2CH(NH2)COOH
    • DTXSID5046988
    • CHEBI:15356
    • NSC-63864
    • NSC647530
    • H-Cys-OH HCl HO
    • NCGC00160365-01
    • L-CYSTEINE (15N)
    • Zystein
    • Hcys
    • (+-)-Cysteine
    • DTXCID3026988
    • dl-Cysteina [Polish]
    • dl-Cysteina
    • NSC 63864
    • CAS-3374-22-9
    • EINECS 222-160-2
    • UNII-5CM45Q5YAF
    • L-Cysteine from non-animal source
    • Cisteine
    • CCRIS 8598
    • d,l-cysteine
    • MFCD00066461
    • Cysteine #
    • 2-amino-3-sulfanyl-propanoic acid
    • [35s]cysteine
    • Cysteine;Half-cystine
    • D-CYCSTEINE
    • DL-Cysteine, technical grade
    • CHEMBL54943
    • CYSTEINE, DL- [II]
    • 2-Amino-3-mercaptopropanoicacid
    • BDBM86203
    • L-Cysteine, Cell Culture Reagent
    • HMS3741A05
    • 2-azanyl-3-sulfanyl-propanoic acid
    • BCP29196
    • CAS_5862
    • NSC_5862
    • NSC63864
    • Tox21_111766
    • BBL012104
    • DL-2-Amino-3-mercaptopropionic acid
    • STK123088
    • AKOS000120488
    • AKOS016050520
    • Tox21_111766_1
    • AB02703
    • CS-W013566
    • FC52445
    • HY-W012850
    • NSC-647530
    • NCGC00160365-02
    • NCGC00248803-03
    • BS-11080
    • SY009625
    • SY033653
    • DB-048483
    • DB-052203
    • DB-057289
    • DB-264857
    • NS00083856
    • EN300-18222
    • C00736
    • Z00059
    • A821916
    • SR-01000944791
    • SR-01000944791-1
    • Q27089394
    • Q27115095
    • F1652-0636
    • 967F57EB-6B67-4DBB-B592-83B1465053AE
    • DL-2-Amino-3-mercaptopropionic acid;2-Amino-3-sulfanylpropanoic acid
    • 84012-74-8

  • Applications

    DL-Cysteine is a racemic amino acid used as a building block and synthetic intermediate in pharmaceutical and fine-chemical manufacture; in the food industry it is commonly employed as a dough conditioner to improve dough handling and extensibility and may act as a reducing agent in processing steps; in flavor-related applications, cysteine can serve as a precursor to sulfur-containing flavor compounds and can influence Maillard-type flavor development; in cosmetics and personal care, it provides a cysteine source for formulations containing sulfhydryl groups; in the polymers and coatings sector, it can function as a mild reducing agent or stabilizer and as a feedstock for thiol-functional polymers and crosslinkers.

    gpt-5-nano

  • Solubility @25˚C

    Solvent Solubility (g/L)
    ethanol 0.75
    methanol 5.92
    isopropanol 0.24
    water 172.13
    ethyl acetate 0.06
    n-propanol 0.21
    acetone 12.09
    n-butanol 0.1
    acetonitrile 0.06
    DMF 8.22
    toluene 0.03
    isobutanol 0.06
    1,4-dioxane 0.21
    methyl acetate 0.08
    THF 0.85
    2-butanone 0.27
    n-pentanol 0.13
    sec-butanol 0.06
    n-hexane 0.04
    ethylene glycol 11.84
    NMP 14.48
    cyclohexane 0.05
    DMSO 44.98
    n-butyl acetate 0.18
    n-octanol 0.22
    chloroform 0.02
    n-propyl acetate 0.1
    acetic acid 13.26
    dichloromethane 0.03
    cyclohexanone 0.75
    propylene glycol 2.4
    isopropyl acetate 0.12
    DMAc 4.65
    2-ethoxyethanol 1.8
    isopentanol 0.12
    n-heptane 0.09
    ethyl formate 0.26
    1,2-dichloroethane 0.05
    n-hexanol 0.24
    2-methoxyethanol 3.77
    isobutyl acetate 0.08
    tetrachloromethane 0.04
    n-pentyl acetate 0.28
    transcutol 6.92
    n-heptanol 0.4
    ethylbenzene 0.03
    MIBK 0.38
    2-propoxyethanol 1.61
    tert-butanol 0.55
    MTBE 0.09
    2-butoxyethanol 1.84
    propionic acid 0.63
    o-xylene 0.08
    formic acid 70.31
    diethyl ether 0.06
    m-xylene 0.08
    p-xylene 0.07
    chlorobenzene 0.03
    dimethyl carbonate 0.22
    n-octane 0.05
    formamide 32.89
    cyclopentanone 1.57
    2-pentanone 0.36
    anisole 0.09
    cyclopentyl methyl ether 0.21
    gamma-butyrolactone 1.36
    1-methoxy-2-propanol 1.56
    pyridine 0.15
    3-pentanone 0.17
    furfural 2.9
    n-dodecane 0.03
    diethylene glycol 6.95
    diisopropyl ether 0.07
    tert-amyl alcohol 0.22
    acetylacetone 1.95
    n-hexadecane 0.03
    acetophenone 0.31
    methyl propionate 0.09
    isopentyl acetate 0.22
    trichloroethylene 0.08
    n-nonanol 0.25
    cyclohexanol 0.15
    benzyl alcohol 0.24
    2-ethylhexanol 0.2
    isooctanol 0.37
    dipropyl ether 0.19
    1,2-dichlorobenzene 0.04
    ethyl lactate 0.45
    propylene carbonate 0.57
    n-methylformamide 2.79
    2-pentanol 0.07
    n-pentane 0.03
    1-propoxy-2-propanol 1.07
    1-methoxy-2-propyl acetate 0.56
    2-(2-methoxypropoxy) propanol 3.06
    mesitylene 0.14
    ε-caprolactone 0.46
    p-cymene 0.15
    epichlorohydrin 0.26
    1,1,1-trichloroethane 0.03
    2-aminoethanol 4.51
    morpholine-4-carbaldehyde 5.21
    sulfolane 10.43
    2,2,4-trimethylpentane 0.02
    2-methyltetrahydrofuran 0.19
    n-hexyl acetate 0.3
    isooctane 0.03
    2-(2-butoxyethoxy)ethanol 3.95
    sec-butyl acetate 0.07
    tert-butyl acetate 0.38
    decalin 0.03
    glycerin 13.26
    diglyme 5.36
    acrylic acid 1.9
    isopropyl myristate 0.2
    n-butyric acid 0.47
    acetyl acetate 0.24
    di(2-ethylhexyl) phthalate 0.7
    ethyl propionate 0.07
    nitromethane 6.15
    1,2-diethoxyethane 0.35
    benzonitrile 0.08
    trioctyl phosphate 0.52
    1-bromopropane 0.02
    gamma-valerolactone 3.09
    n-decanol 0.22
    triethyl phosphate 0.28
    4-methyl-2-pentanol 0.13
    propionitrile 0.03
    vinylene carbonate 0.45
    1,1,2-trichlorotrifluoroethane 2.45
    DMS 0.32
    cumene 0.07
    2-octanol 0.21
    2-hexanone 0.23
    octyl acetate 0.28
    limonene 0.19
    1,2-dimethoxyethane 1.29
    ethyl orthosilicate 0.26
    tributyl phosphate 0.46
    diacetone alcohol 1.83
    N,N-dimethylaniline 0.26
    acrylonitrile 0.08
    aniline 0.1
    1,3-propanediol 2.18
    bromobenzene 0.02
    dibromomethane 0.03
    1,1,2,2-tetrachloroethane 0.08
    2-methyl-cyclohexyl acetate 0.39
    tetrabutyl urea 1.08
    diisobutyl methanol 0.3
    2-phenylethanol 0.38
    styrene 0.03
    dioctyl adipate 0.48
    dimethyl sulfate 1.3
    ethyl butyrate 0.18
    methyl lactate 0.88
    butyl lactate 0.9
    diethyl carbonate 0.12
    propanediol butyl ether 3.03
    triethyl orthoformate 0.26
    p-tert-butyltoluene 0.17
    methyl 4-tert-butylbenzoate 1.74
    morpholine 0.26
    tert-butylamine 0.19
    n-dodecanol 0.19
    dimethoxymethane 1.45
    ethylene carbonate 0.25
    cyrene 5.02
    2-ethoxyethyl acetate 0.56
    2-ethylhexyl acetate 0.16
    1,2,4-trichlorobenzene 0.07
    4-methylpyridine 0.11
    dibutyl ether 0.12
    2,6-dimethyl-4-heptanol 0.3
    DEF 0.47
    dimethyl isosorbide 4.57
    tetrachloroethylene 0.16
    eugenol 2.24
    triacetin 1.11
    span 80 3.08
    1,4-butanediol 1.2
    1,1-dichloroethane 0.02
    2-methyl-1-pentanol 0.13
    methyl formate 2.46
    2-methyl-1-butanol 0.07
    n-decane 0.04
    butyronitrile 0.04
    3,7-dimethyl-1-octanol 0.24
    1-chlorooctane 0.05
    1-chlorotetradecane 0.04
    n-nonane 0.04
    undecane 0.03
    tert-butylcyclohexane 0.03
    cyclooctane 0.04
    cyclopentanol 0.3
    tetrahydropyran 0.08
    tert-amyl methyl ether 0.09
    2,5,8-trioxanonane 6.23
    1-hexene 0.04
    2-isopropoxyethanol 0.83
    2,2,2-trifluoroethanol 5.9
    methyl butyrate 0.14

    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