1,3-Naphthalenedisulfonic acid, 7-amino-, potassium salt (1:1)

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  • Identifiers

    CAS number
    842-15-9

    Molecular formula
    C10H8KNO6S2

    SMILES
    C1=CC(=CC2=C(C=C(C=C21)S(=O)(=O)O)S(=O)(=O)[O-])N.[K+]

    Safety labels

    Irritant
    Irritant

  • Odor profile

    Fragrance
    Odorless 85.92%
    Cooked 20.85%
    Savory 17.71%
    Bitter 16.93%
    Burnt 16.14%
    Sulfurous 15.1%
    Roasted 14.89%
    Clean 12.64%
    Meaty 12.56%
    Pungent 12.14%

     

    Flavor
    Bitter 83.17%
    Odorless 33.73%
    Bland 21.44%
    Nitrile 20.79%
    Taco 18.48%
    Very strong 18.44%
    Bread crust 18.29%
    Indole 18.23%
    Urine 18.17%
    Formyl 18.0%

     

    Odor impact est.
    Low

  • Properties

    pKa est.
    5.23 (weak acid)

    Molecular weight
    341.4 g/mol

    Flash point

    • 311.26 ˚C est.

  • Synonyms

    • 842-15-9
    • 1,3-Naphthalenedisulfonic acid, 7-amino-, monopotassium salt
    • EINECS 212-669-8
    • Potassium hydrogen 7-aminonaphthalene-1,3-disulphonate
    • DTXSID4061204
    • 1,3-Naphthalenedisulfonic acid, 7-amino-, potassium salt (1:1)
    • RefChem:415362
    • DTXCID0048397
    • 212-669-8
    • potassium 7-amino-3-sulfonaphthalene-1-sulfonate
    • potassium;7-amino-3-sulfonaphthalene-1-sulfonate
    • MFCD00064177
    • Monopotassium 7-Amino-1,3-naphthalenedisulfonate
    • ANDSAP
    • 7G2G8T3SDE
    • orb1941394
    • SCHEMBL6421162
    • AKOS027381823
    • AS-81647
    • SY111982
    • DB-056776
    • F87467
    • Monopotassium 7-aminonaphthalene-1,3-disulfonate
    • 7-aminonaphthalene-1,3-disulfonic acid monopotassium salt
    • 842-15-9

  • Applications

    Primarily used as an intermediate in the synthesis of water-soluble dye and pigment precursors, 1,3-Naphthalenedisulfonic acid, 7-amino-, potassium salt (1:1) finds applications across textiles, coatings, inks, and plastics by enabling the production of dye-forming intermediates with enhanced aqueous solubility due to its sulfonate groups. It is commonly evaluated for coupling in azo dye chemistry and for preparing colorant building blocks that can be dispersed in aqueous media, and may serve in resin and polymer formulations to impart ionic character and improve dye uptake. In specialty applications, it can be used as a dye precursor in electronics-related inks or optical materials, while its use remains subject to local regulations and formulation limits.

    gpt-5-nano

  • Solubility @25˚C

    Solvent Solubility (g/L)
    ethanol 2.82
    methanol 4.79
    isopropanol 1.2
    water 0.27
    ethyl acetate 0.68
    n-propanol 1.5
    acetone 2.96
    n-butanol 0.83
    acetonitrile 2.63
    DMF 41.2
    toluene 0.23
    isobutanol 0.49
    1,4-dioxane 2.8
    methyl acetate 1.21
    THF 8.62
    2-butanone 2.12
    n-pentanol 0.5
    sec-butanol 0.64
    n-hexane 0.01
    ethylene glycol 8.3
    NMP 43.8
    cyclohexane 0.01
    DMSO 28.3
    n-butyl acetate 1.64
    n-octanol 0.5
    chloroform 0.02
    n-propyl acetate 0.94
    acetic acid 2.86
    dichloromethane 0.07
    cyclohexanone 2.0
    propylene glycol 5.5
    isopropyl acetate 0.58
    DMAc 29.13
    2-ethoxyethanol 9.92
    isopentanol 0.47
    n-heptane 0.05
    ethyl formate 1.44
    1,2-dichloroethane 0.16
    n-hexanol 0.82
    2-methoxyethanol 28.23
    isobutyl acetate 0.31
    tetrachloromethane 0.0
    n-pentyl acetate 1.38
    transcutol 10.03
    n-heptanol 1.17
    ethylbenzene 0.12
    MIBK 0.73
    2-propoxyethanol 15.03
    tert-butanol 0.84
    MTBE 0.22
    2-butoxyethanol 8.82
    propionic acid 1.62
    o-xylene 0.21
    formic acid 10.87
    diethyl ether 0.45
    m-xylene 0.19
    p-xylene 0.14
    chlorobenzene 0.09
    dimethyl carbonate 2.26
    n-octane 0.02
    formamide 23.6
    cyclopentanone 7.3
    2-pentanone 1.36
    anisole 0.78
    cyclopentyl methyl ether 1.03
    gamma-butyrolactone 11.27
    1-methoxy-2-propanol 16.63
    pyridine 3.81
    3-pentanone 0.94
    furfural 12.71
    n-dodecane 0.02
    diethylene glycol 21.25
    diisopropyl ether 0.1
    tert-amyl alcohol 0.51
    acetylacetone 2.91
    n-hexadecane 0.03
    acetophenone 1.75
    methyl propionate 1.56
    isopentyl acetate 1.09
    trichloroethylene 0.18
    n-nonanol 0.58
    cyclohexanol 0.38
    benzyl alcohol 1.34
    2-ethylhexanol 0.44
    isooctanol 0.66
    dipropyl ether 1.02
    1,2-dichlorobenzene 0.11
    ethyl lactate 2.59
    propylene carbonate 2.79
    n-methylformamide 15.81
    2-pentanol 0.36
    n-pentane 0.01
    1-propoxy-2-propanol 8.61
    1-methoxy-2-propyl acetate 4.33
    2-(2-methoxypropoxy) propanol 6.49
    mesitylene 0.12
    ε-caprolactone 2.59
    p-cymene 0.28
    epichlorohydrin 3.89
    1,1,1-trichloroethane 0.02
    2-aminoethanol 7.51
    morpholine-4-carbaldehyde 31.61
    sulfolane 16.66
    2,2,4-trimethylpentane 0.0
    2-methyltetrahydrofuran 1.53
    n-hexyl acetate 0.99
    isooctane 0.0
    2-(2-butoxyethoxy)ethanol 8.42
    sec-butyl acetate 0.36
    tert-butyl acetate 0.75
    decalin 0.01
    glycerin 18.9
    diglyme 13.56
    acrylic acid 3.14
    isopropyl myristate 0.54
    n-butyric acid 1.32
    acetyl acetate 0.56
    di(2-ethylhexyl) phthalate 1.22
    ethyl propionate 0.81
    nitromethane 9.49
    1,2-diethoxyethane 1.74
    benzonitrile 1.21
    trioctyl phosphate 0.89
    1-bromopropane 0.05
    gamma-valerolactone 19.42
    n-decanol 0.47
    triethyl phosphate 0.84
    4-methyl-2-pentanol 0.19
    propionitrile 1.25
    vinylene carbonate 2.1
    1,1,2-trichlorotrifluoroethane 5.49
    DMS 1.43
    cumene 0.09
    2-octanol 0.45
    2-hexanone 1.0
    octyl acetate 0.91
    limonene 0.29
    1,2-dimethoxyethane 9.04
    ethyl orthosilicate 0.66
    tributyl phosphate 0.72
    diacetone alcohol 3.8
    N,N-dimethylaniline 0.88
    acrylonitrile 3.71
    aniline 0.79
    1,3-propanediol 7.08
    bromobenzene 0.05
    dibromomethane 0.03
    1,1,2,2-tetrachloroethane 0.17
    2-methyl-cyclohexyl acetate 1.17
    tetrabutyl urea 2.3
    diisobutyl methanol 0.3
    2-phenylethanol 2.23
    styrene 0.14
    dioctyl adipate 1.28
    dimethyl sulfate 4.68
    ethyl butyrate 1.35
    methyl lactate 7.12
    butyl lactate 3.07
    diethyl carbonate 0.91
    propanediol butyl ether 5.77
    triethyl orthoformate 1.25
    p-tert-butyltoluene 0.26
    methyl 4-tert-butylbenzoate 4.39
    morpholine 5.51
    tert-butylamine 0.22
    n-dodecanol 0.35
    dimethoxymethane 12.27
    ethylene carbonate 1.36
    cyrene 12.06
    2-ethoxyethyl acetate 3.1
    2-ethylhexyl acetate 0.74
    1,2,4-trichlorobenzene 0.21
    4-methylpyridine 1.86
    dibutyl ether 0.33
    2,6-dimethyl-4-heptanol 0.3
    DEF 3.65
    dimethyl isosorbide 14.78
    tetrachloroethylene 0.12
    eugenol 6.66
    triacetin 2.85
    span 80 4.21
    1,4-butanediol 2.32
    1,1-dichloroethane 0.04
    2-methyl-1-pentanol 0.29
    methyl formate 8.18
    2-methyl-1-butanol 0.42
    n-decane 0.03
    butyronitrile 0.88
    3,7-dimethyl-1-octanol 0.36
    1-chlorooctane 0.1
    1-chlorotetradecane 0.06
    n-nonane 0.03
    undecane 0.03
    tert-butylcyclohexane 0.01
    cyclooctane 0.01
    cyclopentanol 1.09
    tetrahydropyran 0.79
    tert-amyl methyl ether 0.26
    2,5,8-trioxanonane 11.83
    1-hexene 0.04
    2-isopropoxyethanol 3.8
    2,2,2-trifluoroethanol 1.67
    methyl butyrate 1.16

    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