Sodium 1-naphthol-4-sulfonate

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  • Identifiers

    CAS number
    6099-57-6

    Molecular formula
    C10H7NaO4S

    SMILES
    C1=CC=C2C(=C1)C(=CC=C2S(=O)(=O)[O-])O.[Na+]

    Safety labels

    Irritant
    Irritant

  • Odor profile

    Fragrance
    Odorless 80.64%
    Bitter 22.72%
    Burnt 19.91%
    Phenolic 19.3%
    Cooked 18.83%
    Savory 18.14%
    Balsamic 14.04%
    Roasted 13.47%
    Aromatic 13.45%
    Clean 13.32%

     

    Flavor
    Bitter 84.2%
    Odorless 30.89%
    Nitrile 21.52%
    Very strong 19.43%
    Indole 19.15%
    Urine 19.11%
    Mild 18.77%
    Taco 18.76%
    Bread crust 18.66%
    Moth ball 18.65%

     

    Odor impact est.
    Low

  • Properties

    pKa est.
    6.48 (neutral)

    Molecular weight
    246.22 g/mol

    Flash point

    • 195.13 ˚C est.

  • Synonyms

    • 6099-57-6
    • sodium naphthol sulfonate
    • Sodium 1-Naphthol-4-sulfonate
    • Sodium 4-hydroxynaphthalene-1-sulphonate
    • 1-Naphthalenesulfonic acid, 4-hydroxy-, monosodium salt
    • NEVILLE WINTER ACID
    • K4037B899Z
    • DTXSID6064113
    • RefChem:887729
    • DTXCID4042919
    • 1-naphthol-4-sulfonic acid, sodium salt
    • 228-050-0
    • sodium 4-hydroxynaphthalene-1-sulfonate
    • 1-Naphthol-4-sulfonic acid sodium salt
    • 4-Hydroxy-1-naphthalenesulfonic acid sodium salt
    • Sodium 4-hydroxy-1-naphthalenesulfonate
    • sodium;4-hydroxynaphthalene-1-sulfonate
    • MFCD00021518
    • 4-Hydroxy-1-naphthalenesulfonic acid monosodium salt
    • 1-Naphthalenesulfonic acid, 4-hydroxy-, sodium salt (1:1)
    • Neville Winther Acid
    • Sodium 4-hydroxynaphthalenesulphonate
    • potassium 4-hydroxynaphthalene-1-sulfonate
    • UNII-K4037B899Z
    • EINECS 228-050-0
    • EINECS 298-446-6
    • 93804-68-3
    • AI3-09052
    • 1-Hydroxynaphthalene-4-sulfonic acid sodium salt
    • SCHEMBL125082
    • SCHEMBL29569488
    • GAA09957
    • AKOS016015231
    • sodium4-hydroxynaphthalene-1-sulfonate
    • sodium 4-oxidanylnaphthalene-1-sulfonate
    • AS-14386
    • 4-Hydroxy-1-naphthalenesulfonic acid sodium
    • N0033
    • NS00081496
    • ST50411996
    • 4-hydroxynaphthalenesulfonic acid, sodium salt
    • A832997
    • Q27281926
    • 1-NAPHTHALENESULFONIC ACID, 4-HYDROXY-, MONSODIUM SALT
    • 6099-57-6

  • Applications

    Sodium 1-naphthol-4-sulfonate (CAS 6099-57-6) is primarily used as an intermediate in the synthesis of water-soluble azo dyes for textiles, where it couples with diazonium salts to form colorant molecules; it also serves as a dye precursor for pigments and coatings in inks and decorative finishes due to its sulfonate group that promotes aqueous dispersion. In the polymers/plastics sector, it can be used as a dye precursor to color synthetic fibers and plastic resins, enabling uniform coloration. Additionally, the sulfonate functionality supports its use as a dispersant or wetting agent in pigment formulations and coating systems, aiding pigment stability and processability. Uses are typically evaluated for compliance with local regulations and formulation limits.

    gpt-5-nano

  • Solubility @25˚C

    Solvent Solubility (g/L)
    ethanol 20.52
    methanol 32.39
    isopropanol 12.07
    water 0.27
    ethyl acetate 17.99
    n-propanol 12.8
    acetone 53.89
    n-butanol 10.72
    acetonitrile 22.63
    DMF 251.25
    toluene 7.33
    isobutanol 6.4
    1,4-dioxane 67.58
    methyl acetate 29.61
    THF 161.55
    2-butanone 41.19
    n-pentanol 8.22
    sec-butanol 10.33
    n-hexane 0.15
    ethylene glycol 27.63
    NMP 198.84
    cyclohexane 0.31
    DMSO 188.22
    n-butyl acetate 18.45
    n-octanol 11.89
    chloroform 4.03
    n-propyl acetate 14.52
    acetic acid 18.73
    dichloromethane 9.68
    cyclohexanone 43.25
    propylene glycol 14.57
    isopropyl acetate 15.3
    DMAc 136.28
    2-ethoxyethanol 36.84
    isopentanol 8.85
    n-heptane 0.84
    ethyl formate 14.48
    1,2-dichloroethane 17.28
    n-hexanol 13.69
    2-methoxyethanol 97.94
    isobutyl acetate 6.22
    tetrachloromethane 0.61
    n-pentyl acetate 22.32
    transcutol 99.92
    n-heptanol 13.23
    ethylbenzene 3.61
    MIBK 17.38
    2-propoxyethanol 53.45
    tert-butanol 16.73
    MTBE 11.44
    2-butoxyethanol 34.9
    propionic acid 15.15
    o-xylene 5.66
    formic acid 23.77
    diethyl ether 14.78
    m-xylene 5.67
    p-xylene 3.99
    chlorobenzene 7.93
    dimethyl carbonate 29.27
    n-octane 0.54
    formamide 67.21
    cyclopentanone 100.64
    2-pentanone 29.17
    anisole 17.33
    cyclopentyl methyl ether 27.71
    gamma-butyrolactone 108.2
    1-methoxy-2-propanol 65.23
    pyridine 46.44
    3-pentanone 22.23
    furfural 86.95
    n-dodecane 0.75
    diethylene glycol 63.33
    diisopropyl ether 4.1
    tert-amyl alcohol 13.0
    acetylacetone 50.09
    n-hexadecane 0.88
    acetophenone 22.64
    methyl propionate 26.58
    isopentyl acetate 15.5
    trichloroethylene 24.11
    n-nonanol 12.39
    cyclohexanol 9.93
    benzyl alcohol 16.31
    2-ethylhexanol 8.51
    isooctanol 9.27
    dipropyl ether 12.51
    1,2-dichlorobenzene 8.82
    ethyl lactate 15.65
    propylene carbonate 30.87
    n-methylformamide 73.46
    2-pentanol 8.19
    n-pentane 0.26
    1-propoxy-2-propanol 35.01
    1-methoxy-2-propyl acetate 34.97
    2-(2-methoxypropoxy) propanol 35.51
    mesitylene 3.44
    ε-caprolactone 36.66
    p-cymene 5.87
    epichlorohydrin 98.66
    1,1,1-trichloroethane 4.73
    2-aminoethanol 22.5
    morpholine-4-carbaldehyde 151.67
    sulfolane 133.13
    2,2,4-trimethylpentane 0.28
    2-methyltetrahydrofuran 44.7
    n-hexyl acetate 25.37
    isooctane 0.23
    2-(2-butoxyethoxy)ethanol 47.1
    sec-butyl acetate 9.02
    tert-butyl acetate 21.64
    decalin 0.45
    glycerin 44.41
    diglyme 83.73
    acrylic acid 22.28
    isopropyl myristate 12.34
    n-butyric acid 12.69
    acetyl acetate 14.61
    di(2-ethylhexyl) phthalate 13.5
    ethyl propionate 14.1
    nitromethane 75.97
    1,2-diethoxyethane 27.82
    benzonitrile 18.79
    trioctyl phosphate 10.91
    1-bromopropane 4.39
    gamma-valerolactone 124.4
    n-decanol 9.81
    triethyl phosphate 10.59
    4-methyl-2-pentanol 5.28
    propionitrile 15.46
    vinylene carbonate 27.64
    1,1,2-trichlorotrifluoroethane 55.19
    DMS 27.55
    cumene 2.88
    2-octanol 9.68
    2-hexanone 18.26
    octyl acetate 16.77
    limonene 7.85
    1,2-dimethoxyethane 58.59
    ethyl orthosilicate 9.26
    tributyl phosphate 10.35
    diacetone alcohol 38.26
    N,N-dimethylaniline 13.47
    acrylonitrile 32.1
    aniline 14.17
    1,3-propanediol 27.61
    bromobenzene 5.65
    dibromomethane 4.07
    1,1,2,2-tetrachloroethane 17.44
    2-methyl-cyclohexyl acetate 15.37
    tetrabutyl urea 19.41
    diisobutyl methanol 6.27
    2-phenylethanol 23.16
    styrene 4.36
    dioctyl adipate 18.0
    dimethyl sulfate 57.34
    ethyl butyrate 14.64
    methyl lactate 33.01
    butyl lactate 19.68
    diethyl carbonate 10.16
    propanediol butyl ether 30.81
    triethyl orthoformate 12.73
    p-tert-butyltoluene 5.84
    methyl 4-tert-butylbenzoate 32.25
    morpholine 69.22
    tert-butylamine 6.6
    n-dodecanol 7.29
    dimethoxymethane 99.25
    ethylene carbonate 19.79
    cyrene 43.92
    2-ethoxyethyl acetate 39.19
    2-ethylhexyl acetate 12.41
    1,2,4-trichlorobenzene 13.77
    4-methylpyridine 31.05
    dibutyl ether 9.79
    2,6-dimethyl-4-heptanol 6.27
    DEF 41.9
    dimethyl isosorbide 67.07
    tetrachloroethylene 11.17
    eugenol 34.89
    triacetin 33.28
    span 80 28.12
    1,4-butanediol 10.57
    1,1-dichloroethane 6.34
    2-methyl-1-pentanol 6.98
    methyl formate 59.84
    2-methyl-1-butanol 7.82
    n-decane 1.04
    butyronitrile 11.47
    3,7-dimethyl-1-octanol 8.87
    1-chlorooctane 5.18
    1-chlorotetradecane 2.73
    n-nonane 0.82
    undecane 0.89
    tert-butylcyclohexane 0.38
    cyclooctane 0.21
    cyclopentanol 16.73
    tetrahydropyran 27.64
    tert-amyl methyl ether 11.82
    2,5,8-trioxanonane 66.87
    1-hexene 1.22
    2-isopropoxyethanol 22.5
    2,2,2-trifluoroethanol 13.72
    methyl butyrate 16.22

    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