Acid Blue 29

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  • Identifiers

    CAS number
    5850-35-1

    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(=CC=C4)[N+](=O)[O-])N)O.[Na+].[Na+]

    Safety labels

  • Odor profile

    Fragrance
    Odorless 79.71%
    Cooked 22.88%
    Savory 20.77%
    Bitter 20.35%
    Grape 18.13%
    Burnt 15.99%
    Roasted 15.8%
    Fruity 14.91%
    Milky 14.5%
    Meaty 14.01%

     

    Flavor
    Bitter 91.31%
    Odorless 37.0%
    Bland 21.58%
    Nitrile 20.27%
    Bread crust 18.11%
    Very strong 18.11%
    Taco 17.96%
    Indole 17.81%
    Sweet-like 17.77%
    Roasted peanuts 17.65%

     

    Odor impact est.
    Odorless

  • Properties

    pKa est.
    4.01 (weak acid)

    Molecular weight
    616.5 g/mol

    Flash point

    • 339.24 ˚C est.

  • Synonyms

    • Acid Blue 29
    • 5850-35-1
    • DTXSID20889490
    • RefChem:109232
    • DTXCID901028743
    • disodium;4-amino-5-hydroxy-3-[(3-nitrophenyl)diazenyl]-6-phenyldiazenylnaphthalene-2,7-disulfonate
    • C.I. 20460
    • Mordant Blue 82
    • 2,7-Naphthalenedisulfonic acid, 4-amino-5-hydroxy-3-((3-nitrophenyl)azo)-6-(phenylazo)-, disodium salt
    • 2,7-Naphthalenedisulfonic acid, 4-amino-5-hydroxy-3-[(3-nitrophenyl)azo]-6-(phenylazo)-, disodium salt
    • EINECS 227-449-7
    • SCHEMBL1486029
    • SCHEMBL1486030
    • SCHEMBL2866125
    • SCHEMBL29353452
    • MFCD00009960
    • Disodium 4-amino-5-hydroxy-3-((3-nitrophenyl)azo)-6-(phenylazo)naphthalene-2,7-disulphonate
    • 2,7-Naphthalenedisulfonic acid, 4-amino-5-hydroxy-3-(2-(3-nitrophenyl)diazenyl)-6-(2-phenyldiazenyl)-, sodium salt (1:2)
    • FA160962
    • NS00047125
    • Disodium 4-amino-5-hydroxy-3-[(3-nitrophenyl)diazenyl]-6-(phenyldiazenyl)naphthalene-2,7-disulfonate
    • 5850-35-1

  • Applications

    Acid Blue 29 is primarily used as an anionic acid dye for dyeing protein fibers such as wool and silk under acidic conditions, with additional use on certain polyamide fibers (nylon) in dyeing and printing formulations; in the textile and leather industries it serves as a colorant for textiles, leather finishing, and decorative coatings, and it can be formulated into colorant systems for textile printing inks and polymer coatings, subject to formulation limits and regulatory guidance.

    gpt-5-nano

  • Solubility @25˚C

    Solvent Solubility (g/L)
    ethanol 2.05
    methanol 1.86
    isopropanol 1.2
    water 0.01
    ethyl acetate 3.38
    n-propanol 1.64
    acetone 10.61
    n-butanol 0.87
    acetonitrile 2.86
    DMF 21.8
    toluene 0.81
    isobutanol 0.76
    1,4-dioxane 12.75
    methyl acetate 7.4
    THF 30.0
    2-butanone 11.88
    n-pentanol 0.59
    sec-butanol 1.23
    n-hexane 0.01
    ethylene glycol 0.95
    NMP 26.76
    cyclohexane 0.03
    DMSO 20.83
    n-butyl acetate 2.39
    n-octanol 0.62
    chloroform 2.29
    n-propyl acetate 2.61
    acetic acid 7.35
    dichloromethane 2.55
    cyclohexanone 11.36
    propylene glycol 1.41
    isopropyl acetate 1.83
    DMAc 34.88
    2-ethoxyethanol 5.06
    isopentanol 0.52
    n-heptane 0.02
    ethyl formate 3.21
    1,2-dichloroethane 1.82
    n-hexanol 0.42
    2-methoxyethanol 11.57
    isobutyl acetate 0.94
    tetrachloromethane 0.13
    n-pentyl acetate 2.27
    transcutol 11.02
    n-heptanol 0.52
    ethylbenzene 0.2
    MIBK 1.24
    2-propoxyethanol 5.33
    tert-butanol 0.81
    MTBE 0.96
    2-butoxyethanol 3.63
    propionic acid 3.66
    o-xylene 0.34
    formic acid 4.14
    diethyl ether 1.24
    m-xylene 0.25
    p-xylene 0.3
    chlorobenzene 0.69
    dimethyl carbonate 3.76
    n-octane 0.01
    formamide 6.96
    cyclopentanone 23.36
    2-pentanone 3.76
    anisole 1.39
    cyclopentyl methyl ether 2.14
    gamma-butyrolactone 21.91
    1-methoxy-2-propanol 5.94
    pyridine 11.28
    3-pentanone 3.2
    furfural 15.13
    n-dodecane 0.02
    diethylene glycol 4.04
    diisopropyl ether 0.16
    tert-amyl alcohol 0.9
    acetylacetone 8.75
    n-hexadecane 0.02
    acetophenone 2.49
    methyl propionate 4.64
    isopentyl acetate 1.47
    trichloroethylene 5.4
    n-nonanol 0.72
    cyclohexanol 0.81
    benzyl alcohol 1.39
    2-ethylhexanol 0.27
    isooctanol 0.35
    dipropyl ether 0.88
    1,2-dichlorobenzene 0.47
    ethyl lactate 1.68
    propylene carbonate 5.47
    n-methylformamide 7.91
    2-pentanol 0.42
    n-pentane 0.02
    1-propoxy-2-propanol 3.27
    1-methoxy-2-propyl acetate 4.05
    2-(2-methoxypropoxy) propanol 4.4
    mesitylene 0.1
    ε-caprolactone 9.29
    p-cymene 0.18
    epichlorohydrin 16.47
    1,1,1-trichloroethane 0.94
    2-aminoethanol 1.7
    morpholine-4-carbaldehyde 26.29
    sulfolane 25.44
    2,2,4-trimethylpentane 0.01
    2-methyltetrahydrofuran 6.89
    n-hexyl acetate 2.36
    isooctane 0.0
    2-(2-butoxyethoxy)ethanol 5.88
    sec-butyl acetate 1.16
    tert-butyl acetate 1.67
    decalin 0.01
    glycerin 3.21
    diglyme 11.65
    acrylic acid 4.64
    isopropyl myristate 0.95
    n-butyric acid 2.64
    acetyl acetate 2.82
    di(2-ethylhexyl) phthalate 1.13
    ethyl propionate 1.95
    nitromethane 21.74
    1,2-diethoxyethane 3.54
    benzonitrile 1.76
    trioctyl phosphate 0.75
    1-bromopropane 0.59
    gamma-valerolactone 41.2
    n-decanol 0.53
    triethyl phosphate 0.79
    4-methyl-2-pentanol 0.17
    propionitrile 1.93
    vinylene carbonate 5.13
    1,1,2-trichlorotrifluoroethane 12.01
    DMS 3.07
    cumene 0.09
    2-octanol 0.38
    2-hexanone 3.15
    octyl acetate 1.62
    limonene 0.23
    1,2-dimethoxyethane 10.08
    ethyl orthosilicate 0.64
    tributyl phosphate 0.84
    diacetone alcohol 3.19
    N,N-dimethylaniline 0.67
    acrylonitrile 3.85
    aniline 1.49
    1,3-propanediol 2.75
    bromobenzene 0.51
    dibromomethane 1.08
    1,1,2,2-tetrachloroethane 3.56
    2-methyl-cyclohexyl acetate 1.29
    tetrabutyl urea 2.21
    diisobutyl methanol 0.15
    2-phenylethanol 1.3
    styrene 0.29
    dioctyl adipate 1.98
    dimethyl sulfate 5.68
    ethyl butyrate 1.82
    methyl lactate 4.0
    butyl lactate 2.15
    diethyl carbonate 1.19
    propanediol butyl ether 2.79
    triethyl orthoformate 1.45
    p-tert-butyltoluene 0.15
    methyl 4-tert-butylbenzoate 2.4
    morpholine 14.17
    tert-butylamine 0.22
    n-dodecanol 0.35
    dimethoxymethane 9.52
    ethylene carbonate 3.77
    cyrene 4.64
    2-ethoxyethyl acetate 5.27
    2-ethylhexyl acetate 1.1
    1,2,4-trichlorobenzene 1.11
    4-methylpyridine 5.36
    dibutyl ether 0.87
    2,6-dimethyl-4-heptanol 0.15
    DEF 5.24
    dimethyl isosorbide 6.75
    tetrachloroethylene 1.65
    eugenol 2.73
    triacetin 3.54
    span 80 3.25
    1,4-butanediol 0.78
    1,1-dichloroethane 1.38
    2-methyl-1-pentanol 0.39
    methyl formate 7.68
    2-methyl-1-butanol 0.64
    n-decane 0.03
    butyronitrile 1.32
    3,7-dimethyl-1-octanol 0.4
    1-chlorooctane 0.23
    1-chlorotetradecane 0.1
    n-nonane 0.02
    undecane 0.02
    tert-butylcyclohexane 0.01
    cyclooctane 0.01
    cyclopentanol 1.91
    tetrahydropyran 5.22
    tert-amyl methyl ether 0.8
    2,5,8-trioxanonane 8.76
    1-hexene 0.09
    2-isopropoxyethanol 2.43
    2,2,2-trifluoroethanol 2.46
    methyl butyrate 2.84

    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