Sodium caprolactamate

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  • Identifiers

    CAS number
    2123-24-2

    Molecular formula
    C6H10NNaO

    SMILES
    C1CCC(=O)[N-]CC1.[Na+]

    Safety labels

    Corrosive
    Corrosive

    Irritant
    Irritant

  • Odor profile

    Fragrance
    Coconut 47.27%
    Coumarinic 46.21%
    Sweet 39.0%
    Nutty 38.38%
    Spicy 37.86%
    Tobacco 34.36%
    Caramellic 34.3%
    Animal 33.58%
    Herbal 33.43%
    Lactonic 32.32%

     

    Flavor
    Minty 34.13%
    Bitter 28.77%
    Coconut 26.9%
    Buttery 25.57%
    Animal 25.46%
    Sweet 24.81%
    Tonka 24.46%
    Fatty 24.43%
    Coumarin 23.76%
    Spicy 23.3%

     

    Odor impact est.
    High

  • Properties

    pKa est.
    6.33 (neutral)

    Molecular weight
    135.14 g/mol

    Flash point

    • 89.84 ˚C est.

  • Synonyms

    • sodium caprolactamate
    • 2123-24-2
    • 2H-Azepin-2-one, hexahydro-, sodium salt
    • Sodium caprolactam
    • 12PV43MR7E
    • ADDONYL NL
    • caprolactam sodium salt
    • BRUGGOLEN C 10
    • UNII-12PV43MR7E
    • DTXSID50890554
    • EINECS 218-336-3
    • EC 218-336-3
    • HEXAHYDRO-2H-AZEPIN-2-ONE, SODIUM SALT; CAPROLACTAM, SODIUM SALT
    • RefChem:183818
    • DTXCID901030764
    • 218-336-3
    • sodium;azanidacycloheptan-2-one
    • Hexahydro-2H-azepin-2-one, sodium salt
    • 2H-Azepin-2-one, hexahydro-, sodium salt (1:1)
    • Hexahydro-2H-azepin-2-one,sodium salt
    • SCHEMBL6345128
    • SODIUM 2-OXOAZEPAN-1-IDE
    • AKOS006279077
    • NS00078224
    • Q27251430
    • 2123-24-2

  • Applications

    Sodium caprolactamate (CAS 2123-24-2) is primarily used as a polymerization initiator or catalyst for the production of polyamides (nylon-6) and related polymers. It also serves as a stabilizer and processing additive in polyamide and polyurethane formulations to improve durability and thermal stability. Thanks to its chelating and dispersing characteristics, it is considered a component in coatings, inks, and cleaning formulations to sequester metals and enhance dispersion. It is also used as an intermediate for specialty chemical syntheses in the industrial chemical sector. Additionally, it may function as a pH adjuster or neutralizing agent in certain personal care and household formulations, subject to local regulations and formulation limits.

    gpt-5-nano

  • Solubility @25˚C

    Solvent Solubility (g/L)
    ethanol 799.37
    methanol 1377.45
    isopropanol 456.69
    water 23.6
    ethyl acetate 342.55
    n-propanol 529.17
    acetone 782.69
    n-butanol 385.09
    acetonitrile 1037.05
    DMF 1238.61
    toluene 131.57
    isobutanol 328.58
    1,4-dioxane 670.27
    methyl acetate 401.88
    THF 620.89
    2-butanone 462.99
    n-pentanol 255.69
    sec-butanol 331.91
    n-hexane 17.53
    ethylene glycol 307.36
    NMP 1012.41
    cyclohexane 27.9
    DMSO 1407.9
    n-butyl acetate 164.37
    n-octanol 94.76
    chloroform 1906.11
    n-propyl acetate 179.73
    acetic acid 1844.51
    dichloromethane 1572.28
    cyclohexanone 618.77
    propylene glycol 301.63
    isopropyl acetate 143.1
    DMAc 627.38
    2-ethoxyethanol 334.65
    isopentanol 241.32
    n-heptane 10.61
    ethyl formate 354.75
    1,2-dichloroethane 670.56
    n-hexanol 163.76
    2-methoxyethanol 650.44
    isobutyl acetate 91.31
    tetrachloromethane 162.92
    n-pentyl acetate 154.2
    transcutol 1181.09
    n-heptanol 89.37
    ethylbenzene 63.91
    MIBK 121.6
    2-propoxyethanol 273.6
    tert-butanol 349.9
    MTBE 149.3
    2-butoxyethanol 201.43
    propionic acid 865.08
    o-xylene 87.83
    formic acid 963.51
    diethyl ether 200.98
    m-xylene 73.17
    p-xylene 112.03
    chlorobenzene 458.06
    dimethyl carbonate 116.08
    n-octane 5.91
    formamide 1144.7
    cyclopentanone 825.83
    2-pentanone 273.07
    anisole 190.26
    cyclopentyl methyl ether 212.39
    gamma-butyrolactone 1118.43
    1-methoxy-2-propanol 366.53
    pyridine 1216.57
    3-pentanone 200.34
    furfural 1073.12
    n-dodecane 5.99
    diethylene glycol 305.5
    diisopropyl ether 35.58
    tert-amyl alcohol 254.23
    acetylacetone 324.25
    n-hexadecane 6.67
    acetophenone 208.79
    methyl propionate 276.18
    isopentyl acetate 124.83
    trichloroethylene 1526.66
    n-nonanol 75.8
    cyclohexanol 247.67
    benzyl alcohol 253.78
    2-ethylhexanol 77.85
    isooctanol 70.57
    dipropyl ether 64.57
    1,2-dichlorobenzene 349.07
    ethyl lactate 98.68
    propylene carbonate 446.52
    n-methylformamide 999.44
    2-pentanol 183.31
    n-pentane 17.0
    1-propoxy-2-propanol 167.56
    1-methoxy-2-propyl acetate 137.82
    2-(2-methoxypropoxy) propanol 183.88
    mesitylene 43.14
    ε-caprolactone 530.98
    p-cymene 36.89
    epichlorohydrin 761.88
    1,1,1-trichloroethane 504.33
    2-aminoethanol 516.17
    morpholine-4-carbaldehyde 698.42
    sulfolane 996.74
    2,2,4-trimethylpentane 10.26
    2-methyltetrahydrofuran 462.8
    n-hexyl acetate 200.37
    isooctane 7.01
    2-(2-butoxyethoxy)ethanol 288.63
    sec-butyl acetate 92.33
    tert-butyl acetate 117.08
    decalin 13.51
    glycerin 393.42
    diglyme 485.66
    acrylic acid 994.3
    isopropyl myristate 56.3
    n-butyric acid 683.37
    acetyl acetate 248.41
    di(2-ethylhexyl) phthalate 83.71
    ethyl propionate 134.49
    nitromethane 1940.53
    1,2-diethoxyethane 223.2
    benzonitrile 516.84
    trioctyl phosphate 53.73
    1-bromopropane 262.9
    gamma-valerolactone 885.45
    n-decanol 53.28
    triethyl phosphate 60.95
    4-methyl-2-pentanol 81.88
    propionitrile 564.61
    vinylene carbonate 496.59
    1,1,2-trichlorotrifluoroethane 696.87
    DMS 175.31
    cumene 43.6
    2-octanol 65.19
    2-hexanone 180.67
    octyl acetate 85.7
    limonene 52.01
    1,2-dimethoxyethane 407.95
    ethyl orthosilicate 56.05
    tributyl phosphate 70.69
    diacetone alcohol 183.11
    N,N-dimethylaniline 111.15
    acrylonitrile 943.69
    aniline 377.16
    1,3-propanediol 495.96
    bromobenzene 408.65
    dibromomethane 854.01
    1,1,2,2-tetrachloroethane 1052.33
    2-methyl-cyclohexyl acetate 84.67
    tetrabutyl urea 87.23
    diisobutyl methanol 43.02
    2-phenylethanol 177.89
    styrene 121.79
    dioctyl adipate 105.07
    dimethyl sulfate 231.2
    ethyl butyrate 110.28
    methyl lactate 182.86
    butyl lactate 145.4
    diethyl carbonate 84.08
    propanediol butyl ether 241.37
    triethyl orthoformate 78.35
    p-tert-butyltoluene 32.55
    methyl 4-tert-butylbenzoate 149.96
    morpholine 770.25
    tert-butylamine 177.23
    n-dodecanol 39.39
    dimethoxymethane 275.37
    ethylene carbonate 350.11
    cyrene 179.04
    2-ethoxyethyl acetate 228.17
    2-ethylhexyl acetate 94.43
    1,2,4-trichlorobenzene 410.89
    4-methylpyridine 749.32
    dibutyl ether 83.84
    2,6-dimethyl-4-heptanol 43.02
    DEF 356.04
    dimethyl isosorbide 246.18
    tetrachloroethylene 777.39
    eugenol 180.33
    triacetin 213.25
    span 80 183.65
    1,4-butanediol 202.44
    1,1-dichloroethane 687.33
    2-methyl-1-pentanol 171.07
    methyl formate 563.2
    2-methyl-1-butanol 237.06
    n-decane 9.47
    butyronitrile 444.77
    3,7-dimethyl-1-octanol 79.51
    1-chlorooctane 49.11
    1-chlorotetradecane 18.2
    n-nonane 8.79
    undecane 7.29
    tert-butylcyclohexane 12.1
    cyclooctane 6.79
    cyclopentanol 414.53
    tetrahydropyran 469.4
    tert-amyl methyl ether 97.23
    2,5,8-trioxanonane 329.58
    1-hexene 86.62
    2-isopropoxyethanol 181.57
    2,2,2-trifluoroethanol 471.03
    methyl butyrate 218.86

    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