Acid Yellow 1

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  • Identifiers

    CAS number
    846-70-8

    Molecular formula
    C10H4N2Na2O8S

    SMILES
    C1=CC2=C(C=C1S(=O)(=O)[O-])C(=C(C=C2[N+](=O)[O-])[N+](=O)[O-])[O-].[Na+].[Na+]

    Safety labels

    Irritant
    Irritant

    Health Hazard
    Health

  • Odor profile

    Fragrance
    Odorless 79.14%
    Sweet 21.63%
    Bitter 20.66%
    Burnt 17.81%
    Clean 16.94%
    Cooked 16.58%
    Fatty 16.47%
    Milky 16.27%
    Savory 15.82%
    Sour 14.9%

     

    Flavor
    Bitter 83.39%
    Odorless 44.73%
    Bland 22.72%
    Nitrile 20.22%
    Mild 19.72%
    Very mild 18.81%
    Sweet-like 18.62%
    Bread crust 18.31%
    Very strong 18.17%
    Taco 17.92%

     

    Odor impact est.
    Low

  • Properties

    pKa est.
    4.81 (weak acid)

    Molecular weight
    358.19 g/mol

    Flash point

    • 218.09 ˚C est.

  • Synonyms

    • Naphthol Yellow S
    • Acid yellow 1
    • Sodium flavianate
    • Acid Yellow S
    • C.I. Acid Yellow 1
    • Flavianic acid disodium salt
    • Amacid Yellow S
    • C.I. Food Yellow 1
    • Kiton Yellow S
    • Paper Yellow L
    • Zlut naftolova S
    • Naphtol Yellow S
    • Solar Yellow NY
    • Zlut kysela 1
    • Calcocid Yellow S
    • Naphthol Yellow L
    • Yellow Lake 71
    • Naphthol Yellow OS
    • Naphthol Yellow PL
    • Naphtocard Yellow S
    • Hispacid Yellow NSF
    • Naphthol Yellow SFQ
    • Naphthol Yellow SNA
    • Naphthol Yellow SXX
    • Ext D&C Yellow 7
    • Naphthol Yellow S.FQ
    • Solar Yellow NY Conc
    • C.I. 10316
    • Edicol Supra Yellow Y
    • Kca Naphthol Yellow S
    • Yellow No. 403
    • 1307 Yellow
    • 1422 Yellow
    • Java Naphthol Yellow S
    • Maple Naphthol Yellow S
    • Acid Yellow S (VAN)
    • Japan Yellow 403-1
    • Naphthol Lake Yellow FY
    • Acid Leather Yellow NYS
    • Nankai Naphthol Yellow S
    • Rakuto Naphthol Yellow S
    • Zlut kysela 1 [Czech]
    • A.F. Yellow No. 1
    • Naphthol Yellow SEL 12
    • Dolkwal Naphthol Yellow S
    • Zlut naftolova S [Czech]
    • EXT D&C yellow no. 7
    • FD and C Yellow No. 1
    • Japan Yellow No. 403-1
    • Naphthol yellow S sodium salt
    • Solar Yellow NY, sodium salt
    • CCRIS 7072
    • Naphthol Yellow S disodium salt
    • CI 10316
    • Transparent Yellow Lake 16091
    • 08F8S9O3I5
    • NSC 4150
    • EINECS 212-690-2
    • disodium 5,7-dinitro-8-oxidonaphthalene-2-sulfonate
    • NAPHTHOL YELLOW S [MI]
    • CHEBI:87219
    • 2-Naphthalenesulfonic acid, 8-hydroxy-5,7-dinitro-, disodium salt
    • NSC-4150
    • Disodium 5,7-dinitro-8-oxidonaphthalene-2-sulphonate
    • 2,4-Dinitro-1-naphthol-7-sulfonic acid, disodium salt
    • FD&C YELLOW NO. 1 (DELISTED)
    • KI403(1)
    • Sodium, ((2,4-dinitro-7-sulfo-1-naphthalenyl)oxy)-, sodium salt
    • 2-Naphthalenesulfonic acid, 8-hydroxy-5,7-dinitro-, sodium salt (1:2)
    • 2-NAPHTHALENESULFONIC ACID, 5,7-DINITRO-8-HYDROXY-, DISODIUM SALT
    • NSC4150
    • Dye FDC Yellow No.1
    • FD&C Yellow No. 1
    • RefChem:552653
    • Japanese Yellow 403-1
    • ACID YELLOW 1 [INCI]
    • CI 10316 [INCI]
    • KI403(1) [INCI]
    • 846-70-8
    • Naphthol yellow S hydrate
    • Flavianic acid sodium salt
    • MFCD00003958
    • sodium 5,7-dinitro-8-oxidonaphthalene-2-sulfonate
    • UNII-08F8S9O3I5
    • disodium;5,7-dinitro-8-oxidonaphthalene-2-sulfonate
    • C10H4N2Na2O8S
    • SCHEMBL28479
    • disodium 2,4-dinitro-7-sulfonatonaphthalen-1-olate
    • DTXSID1041718
    • MSK2454
    • 8-Hydroxy-5,7-dinitro-2-naphthalenesulfonic Acid Disodium Salt
    • 99% +(HPLC)
    • SBB057953
    • AKOS024319598
    • AKOS025116965
    • Naphthol Yellow S, analytical standard
    • AS-56926
    • SY077713
    • DB-056816
    • F0100
    • ST50411625
    • Disodium 2,4-Dinitro-1-naphthol-7-sulfonate
    • D90632
    • sodium5,7-dinitro-8-oxidonaphthalene-2-sulfonate
    • Q8214040
    • Disodium 8-Hydroxy-5,7-dinitro-2-naphthalenesulfonate
    • disodium;5,7-dinitro-8-oxido-naphthalene-2-sulfonate
    • 8-hydroxy-5,7-dinitronaphthalene-2-sulfonic acid, sodium salt, sodium salt
    • 2,4-Dinitro-1-naphthol-7-sulfonic acid sodium salt, Acid Yellow 1, Flavianic acid sodium salt
    • 846-70-8

  • Applications

    Acid Yellow 1 (CAS 846-70-8) is primarily used as an acid azo dye for protein fibers such as wool and silk, and for leather finishing. It is also employed as a dye intermediate in the synthesis of other azo dyes and pigments. In addition, it may be used as a colorant in industrial coatings and inks and can be found in formulations for polymers and plastics, subject to local regulations and formulation limits.

    gpt-5-nano

  • Solubility @25˚C

    Solvent Solubility (g/L)
    ethanol 40.73
    methanol 65.65
    isopropanol 16.23
    water 0.72
    ethyl acetate 64.65
    n-propanol 25.29
    acetone 152.08
    n-butanol 13.05
    acetonitrile 79.18
    DMF 333.95
    toluene 30.24
    isobutanol 10.57
    1,4-dioxane 136.53
    methyl acetate 97.36
    THF 251.68
    2-butanone 112.27
    n-pentanol 16.5
    sec-butanol 16.92
    n-hexane 0.47
    ethylene glycol 44.37
    NMP 265.44
    cyclohexane 1.05
    DMSO 253.67
    n-butyl acetate 59.43
    n-octanol 43.73
    chloroform 8.96
    n-propyl acetate 73.42
    acetic acid 39.63
    dichloromethane 22.13
    cyclohexanone 93.35
    propylene glycol 21.29
    isopropyl acetate 40.0
    DMAc 255.06
    2-ethoxyethanol 138.38
    isopentanol 9.29
    n-heptane 1.8
    ethyl formate 45.17
    1,2-dichloroethane 29.22
    n-hexanol 18.98
    2-methoxyethanol 189.49
    isobutyl acetate 22.86
    tetrachloromethane 0.71
    n-pentyl acetate 89.52
    transcutol 442.82
    n-heptanol 30.35
    ethylbenzene 13.63
    MIBK 33.33
    2-propoxyethanol 134.52
    tert-butanol 17.24
    MTBE 19.91
    2-butoxyethanol 103.14
    propionic acid 41.72
    o-xylene 18.03
    formic acid 64.9
    diethyl ether 40.55
    m-xylene 16.74
    p-xylene 13.34
    chlorobenzene 17.21
    dimethyl carbonate 69.02
    n-octane 1.92
    formamide 169.5
    cyclopentanone 171.5
    2-pentanone 70.28
    anisole 66.14
    cyclopentyl methyl ether 59.14
    gamma-butyrolactone 227.93
    1-methoxy-2-propanol 99.29
    pyridine 125.68
    3-pentanone 60.79
    furfural 159.18
    n-dodecane 2.78
    diethylene glycol 137.21
    diisopropyl ether 9.0
    tert-amyl alcohol 17.18
    acetylacetone 130.66
    n-hexadecane 3.25
    acetophenone 80.6
    methyl propionate 85.24
    isopentyl acetate 35.71
    trichloroethylene 40.62
    n-nonanol 46.35
    cyclohexanol 16.46
    benzyl alcohol 51.96
    2-ethylhexanol 14.66
    isooctanol 18.5
    dipropyl ether 33.1
    1,2-dichlorobenzene 13.84
    ethyl lactate 45.51
    propylene carbonate 61.14
    n-methylformamide 165.96
    2-pentanol 10.33
    n-pentane 0.67
    1-propoxy-2-propanol 81.18
    1-methoxy-2-propyl acetate 88.31
    2-(2-methoxypropoxy) propanol 112.47
    mesitylene 8.07
    ε-caprolactone 95.88
    p-cymene 12.53
    epichlorohydrin 185.27
    1,1,1-trichloroethane 6.95
    2-aminoethanol 42.19
    morpholine-4-carbaldehyde 304.17
    sulfolane 200.54
    2,2,4-trimethylpentane 0.33
    2-methyltetrahydrofuran 82.15
    n-hexyl acetate 102.82
    isooctane 0.25
    2-(2-butoxyethoxy)ethanol 194.73
    sec-butyl acetate 34.77
    tert-butyl acetate 46.76
    decalin 0.82
    glycerin 49.71
    diglyme 253.67
    acrylic acid 53.36
    isopropyl myristate 41.94
    n-butyric acid 24.34
    acetyl acetate 33.64
    di(2-ethylhexyl) phthalate 30.37
    ethyl propionate 56.16
    nitromethane 211.92
    1,2-diethoxyethane 133.62
    benzonitrile 50.64
    trioctyl phosphate 25.12
    1-bromopropane 10.97
    gamma-valerolactone 262.16
    n-decanol 36.66
    triethyl phosphate 19.53
    4-methyl-2-pentanol 5.64
    propionitrile 47.87
    vinylene carbonate 56.52
    1,1,2-trichlorotrifluoroethane 82.45
    DMS 88.7
    cumene 7.3
    2-octanol 27.51
    2-hexanone 66.92
    octyl acetate 66.15
    limonene 14.54
    1,2-dimethoxyethane 185.56
    ethyl orthosilicate 16.94
    tributyl phosphate 27.79
    diacetone alcohol 63.53
    N,N-dimethylaniline 37.14
    acrylonitrile 93.27
    aniline 37.79
    1,3-propanediol 40.99
    bromobenzene 12.84
    dibromomethane 10.82
    1,1,2,2-tetrachloroethane 25.95
    2-methyl-cyclohexyl acetate 36.0
    tetrabutyl urea 58.84
    diisobutyl methanol 8.35
    2-phenylethanol 54.92
    styrene 17.26
    dioctyl adipate 56.39
    dimethyl sulfate 93.85
    ethyl butyrate 45.06
    methyl lactate 67.81
    butyl lactate 62.06
    diethyl carbonate 27.01
    propanediol butyl ether 99.91
    triethyl orthoformate 31.32
    p-tert-butyltoluene 12.03
    methyl 4-tert-butylbenzoate 76.02
    morpholine 152.24
    tert-butylamine 6.25
    n-dodecanol 26.2
    dimethoxymethane 209.7
    ethylene carbonate 45.13
    cyrene 98.34
    2-ethoxyethyl acetate 180.53
    2-ethylhexyl acetate 31.32
    1,2,4-trichlorobenzene 22.5
    4-methylpyridine 91.79
    dibutyl ether 44.44
    2,6-dimethyl-4-heptanol 8.35
    DEF 103.42
    dimethyl isosorbide 171.97
    tetrachloroethylene 15.5
    eugenol 93.35
    triacetin 113.54
    span 80 77.34
    1,4-butanediol 22.24
    1,1-dichloroethane 12.66
    2-methyl-1-pentanol 12.03
    methyl formate 145.78
    2-methyl-1-butanol 10.0
    n-decane 4.56
    butyronitrile 26.35
    3,7-dimethyl-1-octanol 23.86
    1-chlorooctane 19.05
    1-chlorotetradecane 9.01
    n-nonane 3.61
    undecane 3.59
    tert-butylcyclohexane 0.55
    cyclooctane 0.72
    cyclopentanol 22.46
    tetrahydropyran 56.76
    tert-amyl methyl ether 22.85
    2,5,8-trioxanonane 212.26
    1-hexene 3.56
    2-isopropoxyethanol 77.24
    2,2,2-trifluoroethanol 22.75
    methyl butyrate 62.95

    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