Sodium Octyl Sulfate

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  • Identifiers

    CAS number
    142-31-4

    Molecular formula
    C8H17NaO4S

    SMILES
    CCCCCCCCOS(=O)(=O)[O-].[Na+]

    Safety labels

    Flammable
    Flammable

    Corrosive
    Corrosive

    Irritant
    Irritant

  • Odor profile

    Fragrance
    Odorless 59.84%
    Fresh 25.09%
    Fatty 20.37%
    Savory 20.35%
    Citrus 18.44%
    Green 17.32%
    Oily 16.52%
    Milky 16.14%
    Meaty 15.78%
    Cooked 15.46%

     

    Flavor
    Bitter 38.75%
    Bland 22.78%
    Green 22.78%
    Mild 20.49%
    Herbal 20.06%
    Odorless 19.54%
    Cedarleaf 19.44%
    Lovage 19.24%
    Heather 19.17%
    Nitrile 19.02%

     

    Odor impact est.
    Medium

  • Properties

    pKa est.
    6.75 (neutral)

    Molecular weight
    232.28 g/mol

    Flash point

    • 122.14 ˚C est.

  • Synonyms

    • Sodium octyl sulfate
    • 142-31-4
    • Sodium octyl sulphate
    • Sipex ols
    • Cycloryl OS
    • Duponol 80
    • Sodium capryl sulfate
    • OCTYL SODIUM SULFATE
    • Sulfuric acid, monooctyl ester, sodium salt
    • DTXSID9036226
    • 6RZL727210
    • Sulfuric acid, monooctyl ester, sodium salt (1:1)
    • DTXCID7016226
    • RefChem:184025
    • 205-535-5
    • sodium n-octyl sulfate
    • sodium;octyl sulfate
    • MFCD00007470
    • Cdc25 inhibitor
    • 1227475-09-3
    • SODIUMOCTYLSULFATE
    • EINECS 205-535-5
    • Octyl sulfate, sodium salt
    • 36609-96-8
    • UNII-6RZL727210
    • octyl sodium sulphate
    • sodium caprylyl sulfate
    • sodium n-octyl sulphate
    • EC 205-535-5
    • n-Octyl sulfate sodium salt
    • SCHEMBL27775
    • SODIUM CAPRYLYL SULPHATE
    • CHEMBL556674
    • orb2942280
    • octyl hydroxysulfonate, sodium salt
    • HY-W096997A
    • Sodium octyl sulfate (SOS), 95%
    • Tox21_301327
    • AKOS015892775
    • NCGC00255572-01
    • AS-57343
    • CAS-142-31-4
    • SY106455
    • Sodium octyl sulfate (40% w/w in water)
    • DB-030361
    • NS00079236
    • ST51037385
    • D95734
    • A807889
    • F236810
    • Q27265410
    • 142-31-4

  • Applications

    Sodium Octyl Sulfate (CAS 142-31-4) is an anionic surfactant used across multiple industry sectors. In household and industrial cleaning, it functions as a wetting and emulsifying agent in detergents and degreasers. In personal care, it is employed as a surfactant in shampoos, body cleansers, and foaming formulations. In coatings, inks, and polymer processing, it serves as an emulsifier and dispersant to stabilize pigment slurries and aid compatibility with other formulation ingredients. In textiles and agriculture, it can act as a wetting agent and formulation additive to improve spreading and uptake. It is also used as an intermediate or formulation aid in various industrial processes; however, actual usage depends on regulatory status and formulation limits.

    gpt-5-nano

  • Solubility @25˚C

    Solvent Solubility (g/L)
    ethanol 267.55
    methanol 281.7
    isopropanol 177.97
    water 0.08
    ethyl acetate 323.67
    n-propanol 171.07
    acetone 703.24
    n-butanol 147.85
    acetonitrile 258.09
    DMF 1916.69
    toluene 187.24
    isobutanol 106.88
    1,4-dioxane 362.16
    methyl acetate 288.01
    THF 972.16
    2-butanone 499.42
    n-pentanol 116.8
    sec-butanol 164.26
    n-hexane 7.22
    ethylene glycol 53.02
    NMP 1701.93
    cyclohexane 19.3
    DMSO 1819.57
    n-butyl acetate 227.33
    n-octanol 60.26
    chloroform 387.8
    n-propyl acetate 201.37
    acetic acid 278.9
    dichloromethane 467.38
    cyclohexanone 864.78
    propylene glycol 108.93
    isopropyl acetate 229.12
    DMAc 1136.46
    2-ethoxyethanol 278.69
    isopentanol 125.57
    n-heptane 4.46
    ethyl formate 169.06
    1,2-dichloroethane 490.34
    n-hexanol 111.76
    2-methoxyethanol 554.25
    isobutyl acetate 101.47
    tetrachloromethane 32.22
    n-pentyl acetate 160.67
    transcutol 961.77
    n-heptanol 49.57
    ethylbenzene 76.09
    MIBK 235.99
    2-propoxyethanol 290.34
    tert-butanol 217.32
    MTBE 194.01
    2-butoxyethanol 155.51
    propionic acid 183.81
    o-xylene 122.05
    formic acid 111.15
    diethyl ether 180.26
    m-xylene 128.89
    p-xylene 91.13
    chlorobenzene 261.85
    dimethyl carbonate 140.84
    n-octane 2.59
    formamide 333.41
    cyclopentanone 1180.26
    2-pentanone 457.83
    anisole 234.21
    cyclopentyl methyl ether 382.22
    gamma-butyrolactone 1030.54
    1-methoxy-2-propanol 469.43
    pyridine 617.04
    3-pentanone 309.17
    furfural 917.79
    n-dodecane 2.53
    diethylene glycol 227.13
    diisopropyl ether 53.34
    tert-amyl alcohol 211.21
    acetylacetone 685.81
    n-hexadecane 3.15
    acetophenone 302.07
    methyl propionate 327.41
    isopentyl acetate 202.16
    trichloroethylene 993.56
    n-nonanol 55.05
    cyclohexanol 185.0
    benzyl alcohol 193.72
    2-ethylhexanol 68.16
    isooctanol 42.92
    dipropyl ether 62.54
    1,2-dichlorobenzene 265.94
    ethyl lactate 109.92
    propylene carbonate 402.34
    n-methylformamide 487.82
    2-pentanol 111.64
    n-pentane 7.76
    1-propoxy-2-propanol 220.71
    1-methoxy-2-propyl acetate 299.95
    2-(2-methoxypropoxy) propanol 236.33
    mesitylene 71.38
    ε-caprolactone 589.16
    p-cymene 46.23
    epichlorohydrin 1004.37
    1,1,1-trichloroethane 268.47
    2-aminoethanol 137.01
    morpholine-4-carbaldehyde 1075.54
    sulfolane 1656.39
    2,2,4-trimethylpentane 5.75
    2-methyltetrahydrofuran 581.14
    n-hexyl acetate 221.53
    isooctane 4.42
    2-(2-butoxyethoxy)ethanol 324.28
    sec-butyl acetate 141.5
    tert-butyl acetate 320.87
    decalin 11.22
    glycerin 153.79
    diglyme 534.52
    acrylic acid 197.72
    isopropyl myristate 71.58
    n-butyric acid 260.39
    acetyl acetate 216.73
    di(2-ethylhexyl) phthalate 94.56
    ethyl propionate 174.36
    nitromethane 834.65
    1,2-diethoxyethane 206.63
    benzonitrile 288.27
    trioctyl phosphate 57.8
    1-bromopropane 168.9
    gamma-valerolactone 1373.7
    n-decanol 39.74
    triethyl phosphate 73.47
    4-methyl-2-pentanol 61.71
    propionitrile 171.82
    vinylene carbonate 341.78
    1,1,2-trichlorotrifluoroethane 572.22
    DMS 213.14
    cumene 45.54
    2-octanol 41.17
    2-hexanone 252.58
    octyl acetate 99.88
    limonene 71.53
    1,2-dimethoxyethane 426.25
    ethyl orthosilicate 62.94
    tributyl phosphate 77.44
    diacetone alcohol 457.43
    N,N-dimethylaniline 155.67
    acrylonitrile 303.44
    aniline 248.57
    1,3-propanediol 185.05
    bromobenzene 273.42
    dibromomethane 275.69
    1,1,2,2-tetrachloroethane 762.56
    2-methyl-cyclohexyl acetate 143.98
    tetrabutyl urea 123.52
    diisobutyl methanol 45.99
    2-phenylethanol 177.93
    styrene 108.36
    dioctyl adipate 136.21
    dimethyl sulfate 367.44
    ethyl butyrate 142.26
    methyl lactate 204.27
    butyl lactate 157.35
    diethyl carbonate 87.79
    propanediol butyl ether 225.97
    triethyl orthoformate 87.99
    p-tert-butyltoluene 47.05
    methyl 4-tert-butylbenzoate 224.46
    morpholine 610.72
    tert-butylamine 106.98
    n-dodecanol 28.66
    dimethoxymethane 472.5
    ethylene carbonate 240.09
    cyrene 275.18
    2-ethoxyethyl acetate 278.49
    2-ethylhexyl acetate 148.0
    1,2,4-trichlorobenzene 359.07
    4-methylpyridine 646.79
    dibutyl ether 64.81
    2,6-dimethyl-4-heptanol 45.99
    DEF 651.93
    dimethyl isosorbide 437.28
    tetrachloroethylene 372.38
    eugenol 221.48
    triacetin 264.99
    span 80 219.09
    1,4-butanediol 69.34
    1,1-dichloroethane 315.46
    2-methyl-1-pentanol 108.36
    methyl formate 277.38
    2-methyl-1-butanol 116.72
    n-decane 4.32
    butyronitrile 185.08
    3,7-dimethyl-1-octanol 69.98
    1-chlorooctane 33.86
    1-chlorotetradecane 13.21
    n-nonane 3.87
    undecane 3.19
    tert-butylcyclohexane 8.56
    cyclooctane 6.24
    cyclopentanol 235.44
    tetrahydropyran 381.09
    tert-amyl methyl ether 181.05
    2,5,8-trioxanonane 402.05
    1-hexene 45.07
    2-isopropoxyethanol 185.37
    2,2,2-trifluoroethanol 88.31
    methyl butyrate 253.07

    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