Acid Yellow 99

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  • Identifiers

    CAS number
    10343-58-5

    Molecular formula
    C16H13CrN4NaO8S

    SMILES
    C/C(=C(\C(=O)NC1=CC=CC=C1)/N=NC2=C(C(=CC(=C2)[N+](=O)[O-])S(=O)(=O)[O-])O)/O.[Na+].[Cr]

    Safety labels

  • Odor profile

    Fragrance
    Odorless 68.74%
    Savory 26.32%
    Cooked 25.23%
    Grape 24.65%
    Bitter 23.25%
    Fruity 22.16%
    Roasted 19.7%
    Meaty 19.68%
    Milky 18.96%
    Burnt 18.11%

     

    Flavor
    Bitter 81.61%
    Odorless 44.57%
    Bland 23.94%
    Mild 21.31%
    Very mild 21.19%
    Nitrile 20.87%
    Bread crust 19.54%
    Taco 19.18%
    Sweet-like 18.96%
    Roasted peanuts 18.81%

     

    Odor impact est.
    Odorless

  • Properties

    pKa est.
    4.88 (weak acid)

    Molecular weight
    496.3 g/mol

    Flash point

    • 233.32 ˚C est.

  • Synonyms

    • Acid Yellow 99 (C.I. 13900)
    • Acid Yellow 99
    • 10343-58-5
    • sodium;3-[[(Z)-1-anilino-3-hydroxy-1-oxobut-2-en-2-yl]diazenyl]-2-hydroxy-5-nitrobenzenesulfonate;chromium
    • SCHEMBL29365547
    • AKOS015903888
    • 10343-58-5

  • Applications

    Acid Yellow 99, CAS 10343-58-5, is an acid dye primarily used in textiles for dyeing protein fibers such as wool and silk and some synthetic fibers, and is also used for leather dyeing and as a colorant in printing inks and coatings; it also functions as a dye intermediate in pigment production and may be used to color polymers/plastics, subject to local regulations.

    gpt-5-nano

  • Solubility @25˚C

    Solvent Solubility (g/L)
    ethanol 10.01
    methanol 18.73
    isopropanol 4.03
    water 0.02
    ethyl acetate 1.41
    n-propanol 6.82
    acetone 12.63
    n-butanol 2.82
    acetonitrile 2.97
    DMF 202.25
    toluene 0.21
    isobutanol 1.98
    1,4-dioxane 6.52
    methyl acetate 4.22
    THF 29.12
    2-butanone 11.29
    n-pentanol 1.4
    sec-butanol 3.12
    n-hexane 0.02
    ethylene glycol 9.64
    NMP 135.43
    cyclohexane 0.04
    DMSO 180.27
    n-butyl acetate 1.04
    n-octanol 0.57
    chloroform 0.44
    n-propyl acetate 1.53
    acetic acid 15.05
    dichloromethane 0.82
    cyclohexanone 9.86
    propylene glycol 22.48
    isopropyl acetate 0.81
    DMAc 160.55
    2-ethoxyethanol 20.49
    isopentanol 1.23
    n-heptane 0.03
    ethyl formate 3.11
    1,2-dichloroethane 0.82
    n-hexanol 0.6
    2-methoxyethanol 75.34
    isobutyl acetate 0.44
    tetrachloromethane 0.03
    n-pentyl acetate 0.81
    transcutol 26.98
    n-heptanol 0.72
    ethylbenzene 0.08
    MIBK 1.26
    2-propoxyethanol 15.55
    tert-butanol 2.01
    MTBE 0.61
    2-butoxyethanol 6.53
    propionic acid 8.03
    o-xylene 0.15
    formic acid 22.54
    diethyl ether 1.04
    m-xylene 0.1
    p-xylene 0.12
    chlorobenzene 0.12
    dimethyl carbonate 5.02
    n-octane 0.02
    formamide 46.84
    cyclopentanone 26.57
    2-pentanone 4.23
    anisole 0.96
    cyclopentyl methyl ether 1.77
    gamma-butyrolactone 24.19
    1-methoxy-2-propanol 42.96
    pyridine 6.72
    3-pentanone 2.98
    furfural 19.32
    n-dodecane 0.01
    diethylene glycol 18.59
    diisopropyl ether 0.1
    tert-amyl alcohol 1.84
    acetylacetone 6.15
    n-hexadecane 0.01
    acetophenone 1.98
    methyl propionate 4.91
    isopentyl acetate 0.68
    trichloroethylene 1.73
    n-nonanol 0.61
    cyclohexanol 1.3
    benzyl alcohol 1.98
    2-ethylhexanol 0.27
    isooctanol 0.37
    dipropyl ether 0.83
    1,2-dichlorobenzene 0.12
    ethyl lactate 4.88
    propylene carbonate 4.39
    n-methylformamide 57.87
    2-pentanol 0.99
    n-pentane 0.03
    1-propoxy-2-propanol 8.89
    1-methoxy-2-propyl acetate 3.9
    2-(2-methoxypropoxy) propanol 8.46
    mesitylene 0.05
    ε-caprolactone 6.94
    p-cymene 0.08
    epichlorohydrin 14.61
    1,1,1-trichloroethane 0.13
    2-aminoethanol 18.53
    morpholine-4-carbaldehyde 69.4
    sulfolane 76.1
    2,2,4-trimethylpentane 0.01
    2-methyltetrahydrofuran 3.9
    n-hexyl acetate 0.93
    isooctane 0.0
    2-(2-butoxyethoxy)ethanol 9.82
    sec-butyl acetate 0.57
    tert-butyl acetate 0.95
    decalin 0.01
    glycerin 49.29
    diglyme 19.34
    acrylic acid 11.31
    isopropyl myristate 0.39
    n-butyric acid 4.46
    acetyl acetate 0.78
    di(2-ethylhexyl) phthalate 0.84
    ethyl propionate 1.42
    nitromethane 37.03
    1,2-diethoxyethane 2.35
    benzonitrile 0.9
    trioctyl phosphate 0.61
    1-bromopropane 0.32
    gamma-valerolactone 57.17
    n-decanol 0.43
    triethyl phosphate 0.84
    4-methyl-2-pentanol 0.32
    propionitrile 2.47
    vinylene carbonate 4.3
    1,1,2-trichlorotrifluoroethane 24.48
    DMS 1.75
    cumene 0.05
    2-octanol 0.35
    2-hexanone 2.32
    octyl acetate 0.7
    limonene 0.14
    1,2-dimethoxyethane 22.67
    ethyl orthosilicate 0.64
    tributyl phosphate 0.66
    diacetone alcohol 6.78
    N,N-dimethylaniline 0.85
    acrylonitrile 6.4
    aniline 1.09
    1,3-propanediol 16.16
    bromobenzene 0.07
    dibromomethane 0.34
    1,1,2,2-tetrachloroethane 1.48
    2-methyl-cyclohexyl acetate 0.9
    tetrabutyl urea 1.9
    diisobutyl methanol 0.17
    2-phenylethanol 1.1
    styrene 0.12
    dioctyl adipate 1.27
    dimethyl sulfate 14.18
    ethyl butyrate 1.22
    methyl lactate 17.94
    butyl lactate 2.89
    diethyl carbonate 0.8
    propanediol butyl ether 7.8
    triethyl orthoformate 1.25
    p-tert-butyltoluene 0.08
    methyl 4-tert-butylbenzoate 2.84
    morpholine 17.9
    tert-butylamine 0.42
    n-dodecanol 0.29
    dimethoxymethane 35.9
    ethylene carbonate 2.58
    cyrene 16.84
    2-ethoxyethyl acetate 2.14
    2-ethylhexyl acetate 0.45
    1,2,4-trichlorobenzene 0.27
    4-methylpyridine 2.98
    dibutyl ether 0.47
    2,6-dimethyl-4-heptanol 0.17
    DEF 12.26
    dimethyl isosorbide 12.69
    tetrachloroethylene 0.67
    eugenol 4.29
    triacetin 2.84
    span 80 5.41
    1,4-butanediol 4.36
    1,1-dichloroethane 0.28
    2-methyl-1-pentanol 0.69
    methyl formate 25.3
    2-methyl-1-butanol 1.52
    n-decane 0.02
    butyronitrile 1.45
    3,7-dimethyl-1-octanol 0.33
    1-chlorooctane 0.1
    1-chlorotetradecane 0.04
    n-nonane 0.02
    undecane 0.02
    tert-butylcyclohexane 0.01
    cyclooctane 0.01
    cyclopentanol 3.51
    tetrahydropyran 2.73
    tert-amyl methyl ether 0.76
    2,5,8-trioxanonane 14.71
    1-hexene 0.1
    2-isopropoxyethanol 6.46
    2,2,2-trifluoroethanol 3.97
    methyl butyrate 2.85

    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