2,7-Naphthalenedisulfonic acid, 4-amino-5-hydroxy-3-(2-(4-nitrophenyl)diazenyl)-6-(2-phenyldiazenyl)-, sodium salt (1:?)

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  • Identifiers

    CAS number
    83006-55-7

    Molecular formula
    C22H14N6Na2O9S2

    SMILES
    C1=CC=C(C=C1)N=NC2=C(C3=C(C(=C(C=C3C=C2S(=O)(=O)[O-])S(=O)(=O)[O-])N=NC4=CC=C(C=C4)[N+](=O)[O-])N)O.[Na+].[Na+]

    Safety labels

  • Odor profile

    Fragrance
    Odorless 80.31%
    Cooked 22.82%
    Savory 20.68%
    Bitter 20.4%
    Grape 17.87%
    Burnt 16.05%
    Roasted 15.9%
    Milky 14.38%
    Meaty 14.02%
    Fruity 13.7%

     

    Flavor
    Bitter 90.47%
    Odorless 37.41%
    Bland 21.43%
    Nitrile 20.28%
    Bread crust 18.27%
    Very strong 18.19%
    Taco 18.14%
    Indole 17.91%
    Roasted peanuts 17.82%
    Sweet-like 17.8%

     

    Odor impact est.
    Odorless

  • Properties

    pKa est.
    4.22 (weak acid)

    Molecular weight
    616.5 g/mol

    Flash point

    • 347.66 ˚C est.

    Solubility expt.

    • SOME SOL IN WATER, ALC, OIL /NIGROSINES/

  • Synonyms

    • 83006-55-7
    • 4-Amino-5-hydroxy-3-((4-nitrophenyl)azo)-6-(phenylazo)naphthalene-2,7-disulphonic acid, sodium salt
    • RefChem:446195
    • DTXSID101085622
    • 2,7-Naphthalenedisulfonic acid, 4-amino-5-hydroxy-3-(2-(4-nitrophenyl)diazenyl)-6-(2-phenyldiazenyl)-, sodium salt (1:?)
    • 280-105-8
    • ACID BLACK 1
    • 1064-48-8
    • Naphthol Blue Black
    • Acid black 2
    • Amido Black 10B
    • 8005-03-6
    • Buffalo Black NBR
    • C.I. Acid Black 1
    • NIGROSINE
    • Amidoschwarz
    • Amido black
    • C.I. Acid Black 1, disodium salt
    • Acidal Black 10B
    • Naphthol Blue Black B
    • Acidal Navy Blue 3BR
    • Acid Blue Black
    • Acid Blue-Black
    • C.I. 20470
    • Sandopel Blue P
    • Boruta Black A
    • Solar Blue Black
    • Acid Black H
    • Kiton Black HA
    • Acid Black BX
    • Blue Black SX
    • Eniacid Black SH
    • Kiton Blue SM
    • Acid Black BRX
    • Acid Black JVS
    • Aniline blue-black
    • Fenazo Blue Black
    • Azo Dark Blue S
    • Kiton Black 2B
    • Brasilan Black BS
    • Acid Black 4BN
    • Acid Black 4BNU
    • Bucacid Blue Black
    • Eniacid Black IVS
    • Hidacid Blue Black
    • Napthol Blue Black
    • Acid Black Base M
    • Acid Blue Black B
    • Azo Dark Blue HR
    • Azo Dark Blue SH
    • Calcocid Blue Black
    • CI 20470
    • Metamine Blue Black
    • Acid Black 10A
    • Acid Black 10B
    • Acid Black 12B
    • Acilan Black 10B
    • Blue Black 12B
    • Acid Black 10BA
    • Acid Black 10BN
    • CI Acid Black 1
    • Airedale Black 2BG
    • Colacid Black 10A
    • Leather Black 10B
    • Acid Blue Black BG
    • Amacid Black 10BR
    • Atul Acid Black BX
    • Acid Brown 187
    • Hispacid Black 10B
    • Naphthol Black 12B
    • Amido Black 10 B
    • Aminoschwarz 10B
    • Comacid Blue Black B
    • Eriosin Blue Black B
    • Fast Sulfon Black BN
    • Naphtylamine Black 4B
    • D&C Black 1
    • Naphtocard Black 12B
    • Naphthol Blue Black G
    • Naphthol Blue Black T
    • Naphthalene Black 12B
    • Acid Blue Black 10B
    • Acid Leather Blue IGW
    • Java Blue Black 10B
    • Mitsui Acid Blue Black
    • Naphthol Blue Black BC
    • Pontacyl Blue Black SX
    • Acid Leather Fast Blue Black G
    • Naphtylamine Black 10B
    • Atul Acid Black 10BX
    • Calcocid Blue Black 2R
    • Naphthalene Black 12BN
    • Naphthol Blue Black 6B
    • Diacid Blue Black 10B
    • Naphthol Blue Black CWC
    • Pontacyl Blue Black SXR
    • Tertracid Blue Black NB
    • Naphtylamine Black 10BN
    • Naphtol Blue Black 12B
    • Naphthylamine Black 10BR
    • D and C Black No. 1
    • Naphthol Blue Black 10B
    • Acid Leather Dark Blue G
    • D And C Black Number 1
    • Hastings Acid Black 10BG
    • Hastings Acid Black 10BR
    • Leather Fast Blue Black G
    • Vondamol Light Black 10B
    • Naphthazine Blue Black 6BN
    • Naphtylamine Black 10BR-CF
    • Azanol Fast Acid Black 10B
    • Kayaku Acid Blue Black 10B
    • MFCD00004017
    • Acid Blue Black Double 600
    • 2,7-Naphthalenedisulfonic acid, 4-amino-5-hydroxy-3-((4-nitrophenyl)azo)-6-(phenylazo)-, disodium salt
    • SZT789770M
    • Sodium 4-amino-5-hydroxy-3-(4-nitrophenylazo)-6-(phenylazo)naphthalene-2,7-disulphonate
    • 4-Amino-5-hydroxy-3-((4-nitrophenyl)azo)-6-(phenylazo)-2,7-naphth- alenedisulfonic acid, disodium salt
    • disodium;4-amino-5-hydroxy-3-[(4-nitrophenyl)diazenyl]-6-phenyldiazenylnaphthalene-2,7-disulfonate
    • Sodium 4-amino-5-hydroxy-3-((4-nitrophenyl)diazenyl)-6-(phenyldiazenyl)naphthalene-2,7-disulfonate
    • Fast Sulon Black BN
    • Azo Dark Blue C 2B
    • NIGROSINE (WATER SOLUBLE)
    • CERN kysela 1 [Czech]
    • 2,7-Naphthalenedisulfonic acid, 4-amino-5-hydroxy-3-(2-(4-nitrophenyl)diazenyl)-6-(2-phenyldiazenyl)-, sodium salt (1:2)
    • CERN kysela 1
    • NSC-7820
    • 8005-03-6

  • Applications

    2,7-Naphthalenedisulfonic acid, 4-amino-5-hydroxy-3-(2-(4-nitrophenyl)diazenyl)-6-(2-phenyldiazenyl)-, sodium salt (1:?) is a sodium sulfonate salt of a naphthalene-based scaffold bearing two sulfonic groups and multiple azo linkages, commonly used as an azo dye intermediate and a water-soluble colorant. In industry, it is commonly employed as a precursor for the synthesis of water-soluble azo dyes. Typical applications include: as a colorant and precursor for textile dyeing and fiber coloration; as a colorant additive for printing inks and coatings to achieve stable, soluble colors; as a colorant precursor for plastics and polymers for pigmentation; as a colorant in paper and papermaking processes; and it may be used as an intermediate in industrial color systems, depending on regulations and formulation.

    gpt-5-nano

  • Solubility @25˚C

    Solvent Solubility (g/L)
    ethanol 2.53
    methanol 2.28
    isopropanol 1.49
    water 0.01
    ethyl acetate 3.89
    n-propanol 2.03
    acetone 12.09
    n-butanol 1.1
    acetonitrile 2.97
    DMF 24.69
    toluene 0.98
    isobutanol 0.92
    1,4-dioxane 14.39
    methyl acetate 7.96
    THF 34.28
    2-butanone 13.58
    n-pentanol 0.72
    sec-butanol 1.55
    n-hexane 0.01
    ethylene glycol 1.06
    NMP 28.67
    cyclohexane 0.04
    DMSO 22.35
    n-butyl acetate 2.65
    n-octanol 0.73
    chloroform 2.39
    n-propyl acetate 2.9
    acetic acid 7.75
    dichloromethane 2.7
    cyclohexanone 13.37
    propylene glycol 1.7
    isopropyl acetate 2.1
    DMAc 37.06
    2-ethoxyethanol 5.76
    isopentanol 0.63
    n-heptane 0.02
    ethyl formate 3.55
    1,2-dichloroethane 1.99
    n-hexanol 0.5
    2-methoxyethanol 13.32
    isobutyl acetate 1.0
    tetrachloromethane 0.15
    n-pentyl acetate 2.59
    transcutol 12.92
    n-heptanol 0.61
    ethylbenzene 0.23
    MIBK 1.42
    2-propoxyethanol 6.03
    tert-butanol 1.0
    MTBE 1.17
    2-butoxyethanol 4.05
    propionic acid 4.17
    o-xylene 0.41
    formic acid 4.32
    diethyl ether 1.53
    m-xylene 0.3
    p-xylene 0.34
    chlorobenzene 0.77
    dimethyl carbonate 3.97
    n-octane 0.02
    formamide 7.31
    cyclopentanone 26.3
    2-pentanone 4.53
    anisole 1.53
    cyclopentyl methyl ether 2.49
    gamma-butyrolactone 23.29
    1-methoxy-2-propanol 7.0
    pyridine 12.46
    3-pentanone 3.79
    furfural 15.97
    n-dodecane 0.02
    diethylene glycol 4.37
    diisopropyl ether 0.2
    tert-amyl alcohol 1.1
    acetylacetone 9.77
    n-hexadecane 0.03
    acetophenone 2.67
    methyl propionate 5.17
    isopentyl acetate 1.59
    trichloroethylene 5.61
    n-nonanol 0.86
    cyclohexanol 1.04
    benzyl alcohol 1.56
    2-ethylhexanol 0.32
    isooctanol 0.4
    dipropyl ether 0.99
    1,2-dichlorobenzene 0.5
    ethyl lactate 1.84
    propylene carbonate 5.7
    n-methylformamide 8.98
    2-pentanol 0.54
    n-pentane 0.02
    1-propoxy-2-propanol 3.77
    1-methoxy-2-propyl acetate 4.47
    2-(2-methoxypropoxy) propanol 4.97
    mesitylene 0.12
    ε-caprolactone 10.34
    p-cymene 0.19
    epichlorohydrin 17.56
    1,1,1-trichloroethane 1.02
    2-aminoethanol 1.97
    morpholine-4-carbaldehyde 28.45
    sulfolane 26.7
    2,2,4-trimethylpentane 0.01
    2-methyltetrahydrofuran 7.89
    n-hexyl acetate 2.72
    isooctane 0.0
    2-(2-butoxyethoxy)ethanol 6.62
    sec-butyl acetate 1.3
    tert-butyl acetate 1.88
    decalin 0.01
    glycerin 3.78
    diglyme 12.86
    acrylic acid 5.06
    isopropyl myristate 1.07
    n-butyric acid 3.08
    acetyl acetate 3.03
    di(2-ethylhexyl) phthalate 1.23
    ethyl propionate 2.17
    nitromethane 22.6
    1,2-diethoxyethane 4.16
    benzonitrile 1.86
    trioctyl phosphate 0.82
    1-bromopropane 0.68
    gamma-valerolactone 45.55
    n-decanol 0.62
    triethyl phosphate 0.83
    4-methyl-2-pentanol 0.21
    propionitrile 2.15
    vinylene carbonate 5.37
    1,1,2-trichlorotrifluoroethane 12.7
    DMS 3.35
    cumene 0.1
    2-octanol 0.46
    2-hexanone 3.58
    octyl acetate 1.81
    limonene 0.27
    1,2-dimethoxyethane 11.35
    ethyl orthosilicate 0.69
    tributyl phosphate 0.93
    diacetone alcohol 3.65
    N,N-dimethylaniline 0.73
    acrylonitrile 4.14
    aniline 1.76
    1,3-propanediol 3.3
    bromobenzene 0.54
    dibromomethane 1.16
    1,1,2,2-tetrachloroethane 3.8
    2-methyl-cyclohexyl acetate 1.36
    tetrabutyl urea 2.37
    diisobutyl methanol 0.17
    2-phenylethanol 1.41
    styrene 0.33
    dioctyl adipate 2.17
    dimethyl sulfate 5.87
    ethyl butyrate 2.01
    methyl lactate 4.4
    butyl lactate 2.46
    diethyl carbonate 1.25
    propanediol butyl ether 3.23
    triethyl orthoformate 1.58
    p-tert-butyltoluene 0.17
    methyl 4-tert-butylbenzoate 2.61
    morpholine 16.53
    tert-butylamine 0.27
    n-dodecanol 0.41
    dimethoxymethane 10.85
    ethylene carbonate 4.03
    cyrene 4.98
    2-ethoxyethyl acetate 5.95
    2-ethylhexyl acetate 1.18
    1,2,4-trichlorobenzene 1.18
    4-methylpyridine 5.93
    dibutyl ether 1.02
    2,6-dimethyl-4-heptanol 0.17
    DEF 6.06
    dimethyl isosorbide 7.05
    tetrachloroethylene 1.79
    eugenol 2.88
    triacetin 3.89
    span 80 3.75
    1,4-butanediol 0.91
    1,1-dichloroethane 1.53
    2-methyl-1-pentanol 0.46
    methyl formate 8.35
    2-methyl-1-butanol 0.78
    n-decane 0.04
    butyronitrile 1.49
    3,7-dimethyl-1-octanol 0.46
    1-chlorooctane 0.27
    1-chlorotetradecane 0.12
    n-nonane 0.03
    undecane 0.03
    tert-butylcyclohexane 0.01
    cyclooctane 0.01
    cyclopentanol 2.3
    tetrahydropyran 6.5
    tert-amyl methyl ether 0.97
    2,5,8-trioxanonane 9.49
    1-hexene 0.11
    2-isopropoxyethanol 2.76
    2,2,2-trifluoroethanol 2.52
    methyl butyrate 3.13

    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