Acid Red 13

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  • Identifiers

    CAS number
    2302-96-7

    Molecular formula
    C20H12N2Na2O7S2

    SMILES
    C1=CC=C2C(=C1)C(=CC=C2S(=O)(=O)[O-])N=NC3=C(C=CC4=C3C=CC(=C4)S(=O)(=O)[O-])O.[Na+].[Na+]

    Safety labels

  • Odor profile

    Fragrance
    Odorless 79.12%
    Cooked 22.5%
    Bitter 19.86%
    Savory 19.47%
    Burnt 17.83%
    Roasted 15.14%
    Grape 14.24%
    Pungent 13.57%
    Clean 13.24%
    Meaty 12.92%

     

    Flavor
    Bitter 91.42%
    Odorless 31.55%
    Nitrile 19.91%
    Bland 19.49%
    Very strong 18.07%
    Indole 17.79%
    Taco 17.58%
    Bread crust 17.53%
    Moth ball 17.17%
    Roasted peanuts 17.06%

     

    Odor impact est.
    Odorless

  • Properties

    pKa est.
    4.49 (weak acid)

    Molecular weight
    502.4 g/mol

    Flash point

    • 353.65 ˚C est.

  • Synonyms

    • Acid Red 13
    • C.I. Acid Red 13
    • 5926AP228X
    • CI 16045
    • 1-Naphthalenesulfonic acid, 4-(2-(2-hydroxy-6-sulfo-1-naphthalenyl)diazenyl)-, sodium salt (1:2)
    • 1-Naphthalenesulfonic acid, 4-[2-(2-hydroxy-6-sulfo-1-naphthalenyl)diazenyl]-, sodium salt (1:2)
    • RefChem:552628
    • C.I. Acid Red 13 (7CI)
    • 2302-96-7
    • Fast Red E
    • Food Red 4
    • C.I. Food Red 4
    • C.I. 16045
    • Sodium 4-((2-hydroxy-6-sulfonatonaphthalen-1-yl)diazenyl)naphthalene-1-sulfonate
    • Tertracid Red E
    • 85283-71-2
    • HD Fast Red E
    • Neklacid Red E
    • Dalf Fast Red
    • Acidal Red E
    • Acidol Red E
    • Acilan Red E
    • Cilefa Red E
    • Red E for food
    • 1-Naphthalenesulfonic acid, 4-((2-hydroxy-6-sulfo-1-naphthalenyl)azo)-, disodium salt
    • 1-Naphthalenesulfonic acid, 4-[(2-hydroxy-6-sulfo-1-naphthalenyl)azo]-, disodium salt
    • disodium;6-hydroxy-5-[(4-sulfonatonaphthalen-1-yl)diazenyl]naphthalene-2-sulfonate
    • Naphthionic Red A
    • Naphthalene Red EA
    • Cherry Red A Geigy
    • Crispin Fast Red E
    • Hexacol Fast Red E
    • Hexalan Fast Red E
    • Certicol Fast Red E
    • Hispacid Fast Red E
    • Neklacid Fast Red E
    • Acid Leather Red IBW
    • HD Fast Red E Supra
    • Fast Red Specially Pure
    • MFCD00191366
    • Brilliant Ponceau 3RF Extra
    • 1869 Red
    • C.I. Acid Red 13, disodium salt
    • EINECS 218-958-5
    • EINECS 286-600-5
    • DTXSID3062314
    • SCHEMBL29366329
    • UNII-5926AP228X
    • MSK5972
    • CHEBI:180880
    • XYTVLRKJXNXOOI-CAPIVQQTSA-L
    • CAA30296
    • Disodium 4-((2-hydroxy-6-sulphonatonaphthyl)azo)naphthalenesulphonate
    • AKOS015903546
    • AKOS025310825
    • 4-((2-Hydroxy-6-sulpho-1-naphthyl)azo)naphthalene-1-sulphonic acid, sodium salt
    • A1243
    • NS00048636
    • D88402
    • Q27896497
    • 1-Naphthalenesulfonicacid,4-[2-(2-hydroxy-6-sulfo-1-naphthalenyl)diazenyl],sodium salt
    • Disodium 4-[(2-hydroxy-6-sulfonatonaphthalen-1-yl)diazenyl]naphthalene-1-sulfonate
    • disodium 6-hydroxy-5-[(4-sulfonato-1-naphthyl)diazenyl]-2-naphthalene sulfonate
    • disodium;6-hydroxy-5-[(4-sulonatonaphthalen-1-yl)diazenyl]naphthalene-2-sulonate
    • 2302-96-7

  • Applications

    Acid Red 13 (CAS 2302-96-7) is primarily used as an acid dye for protein fibers such as wool and silk and for dyeing leather, providing stable color in processing and finished goods; it is also employed as a colorant in printing inks and coatings, especially in water-based systems, and may be used as a colorant for plastics and other polymers in the form of color concentrates; in addition, Acid Red 13 can serve as an intermediate in the synthesis of related azo dyes or pigment precursors for industrial color manufacture.

    gpt-5-nano

  • Solubility @25˚C

    Solvent Solubility (g/L)
    ethanol 1.77
    methanol 2.03
    isopropanol 1.23
    water 0.01
    ethyl acetate 2.1
    n-propanol 1.7
    acetone 10.66
    n-butanol 1.09
    acetonitrile 2.16
    DMF 40.11
    toluene 0.72
    isobutanol 0.8
    1,4-dioxane 11.44
    methyl acetate 4.04
    THF 24.27
    2-butanone 9.31
    n-pentanol 0.72
    sec-butanol 1.4
    n-hexane 0.01
    ethylene glycol 1.3
    NMP 15.72
    cyclohexane 0.04
    DMSO 15.37
    n-butyl acetate 2.15
    n-octanol 1.47
    chloroform 0.89
    n-propyl acetate 1.8
    acetic acid 3.41
    dichloromethane 1.11
    cyclohexanone 9.8
    propylene glycol 1.44
    isopropyl acetate 1.62
    DMAc 30.94
    2-ethoxyethanol 5.22
    isopentanol 0.69
    n-heptane 0.03
    ethyl formate 2.21
    1,2-dichloroethane 1.1
    n-hexanol 0.68
    2-methoxyethanol 13.89
    isobutyl acetate 0.71
    tetrachloromethane 0.07
    n-pentyl acetate 3.46
    transcutol 18.66
    n-heptanol 1.13
    ethylbenzene 0.21
    MIBK 1.68
    2-propoxyethanol 7.84
    tert-butanol 1.05
    MTBE 1.0
    2-butoxyethanol 5.72
    propionic acid 2.12
    o-xylene 0.37
    formic acid 2.85
    diethyl ether 1.33
    m-xylene 0.31
    p-xylene 0.31
    chlorobenzene 0.49
    dimethyl carbonate 3.05
    n-octane 0.04
    formamide 6.67
    cyclopentanone 18.18
    2-pentanone 4.53
    anisole 1.08
    cyclopentyl methyl ether 2.05
    gamma-butyrolactone 12.66
    1-methoxy-2-propanol 7.87
    pyridine 7.85
    3-pentanone 3.23
    furfural 9.79
    n-dodecane 0.06
    diethylene glycol 6.56
    diisopropyl ether 0.24
    tert-amyl alcohol 1.04
    acetylacetone 8.19
    n-hexadecane 0.07
    acetophenone 1.86
    methyl propionate 3.19
    isopentyl acetate 1.45
    trichloroethylene 2.58
    n-nonanol 1.71
    cyclohexanol 1.13
    benzyl alcohol 1.35
    2-ethylhexanol 0.41
    isooctanol 0.71
    dipropyl ether 1.14
    1,2-dichlorobenzene 0.38
    ethyl lactate 1.51
    propylene carbonate 2.7
    n-methylformamide 8.91
    2-pentanol 0.61
    n-pentane 0.02
    1-propoxy-2-propanol 4.92
    1-methoxy-2-propyl acetate 4.08
    2-(2-methoxypropoxy) propanol 5.92
    mesitylene 0.16
    ε-caprolactone 5.9
    p-cymene 0.26
    epichlorohydrin 10.22
    1,1,1-trichloroethane 0.38
    2-aminoethanol 1.84
    morpholine-4-carbaldehyde 23.89
    sulfolane 12.87
    2,2,4-trimethylpentane 0.01
    2-methyltetrahydrofuran 3.97
    n-hexyl acetate 3.39
    isooctane 0.01
    2-(2-butoxyethoxy)ethanol 9.6
    sec-butyl acetate 0.92
    tert-butyl acetate 1.81
    decalin 0.01
    glycerin 4.4
    diglyme 14.65
    acrylic acid 2.84
    isopropyl myristate 1.65
    n-butyric acid 1.99
    acetyl acetate 1.55
    di(2-ethylhexyl) phthalate 1.46
    ethyl propionate 1.34
    nitromethane 12.11
    1,2-diethoxyethane 5.6
    benzonitrile 1.84
    trioctyl phosphate 1.15
    1-bromopropane 0.38
    gamma-valerolactone 32.84
    n-decanol 1.27
    triethyl phosphate 0.68
    4-methyl-2-pentanol 0.28
    propionitrile 1.98
    vinylene carbonate 3.03
    1,1,2-trichlorotrifluoroethane 7.65
    DMS 2.99
    cumene 0.12
    2-octanol 1.0
    2-hexanone 2.89
    octyl acetate 2.17
    limonene 0.33
    1,2-dimethoxyethane 10.25
    ethyl orthosilicate 0.65
    tributyl phosphate 1.32
    diacetone alcohol 3.84
    N,N-dimethylaniline 0.72
    acrylonitrile 4.12
    aniline 1.36
    1,3-propanediol 3.3
    bromobenzene 0.34
    dibromomethane 0.48
    1,1,2,2-tetrachloroethane 2.0
    2-methyl-cyclohexyl acetate 1.17
    tetrabutyl urea 3.51
    diisobutyl methanol 0.33
    2-phenylethanol 1.72
    styrene 0.29
    dioctyl adipate 2.25
    dimethyl sulfate 3.54
    ethyl butyrate 1.6
    methyl lactate 3.87
    butyl lactate 3.45
    diethyl carbonate 0.92
    propanediol butyl ether 5.69
    triethyl orthoformate 1.48
    p-tert-butyltoluene 0.27
    methyl 4-tert-butylbenzoate 3.08
    morpholine 12.24
    tert-butylamine 0.32
    n-dodecanol 0.92
    dimethoxymethane 13.19
    ethylene carbonate 2.27
    cyrene 4.13
    2-ethoxyethyl acetate 6.67
    2-ethylhexyl acetate 1.05
    1,2,4-trichlorobenzene 0.71
    4-methylpyridine 3.7
    dibutyl ether 1.85
    2,6-dimethyl-4-heptanol 0.33
    DEF 5.15
    dimethyl isosorbide 8.69
    tetrachloroethylene 1.15
    eugenol 4.34
    triacetin 3.98
    span 80 4.65
    1,4-butanediol 0.96
    1,1-dichloroethane 0.65
    2-methyl-1-pentanol 0.49
    methyl formate 7.12
    2-methyl-1-butanol 0.74
    n-decane 0.09
    butyronitrile 1.48
    3,7-dimethyl-1-octanol 0.83
    1-chlorooctane 0.52
    1-chlorotetradecane 0.24
    n-nonane 0.07
    undecane 0.07
    tert-butylcyclohexane 0.01
    cyclooctane 0.01
    cyclopentanol 1.96
    tetrahydropyran 4.28
    tert-amyl methyl ether 0.86
    2,5,8-trioxanonane 12.17
    1-hexene 0.09
    2-isopropoxyethanol 2.71
    2,2,2-trifluoroethanol 1.49
    methyl butyrate 2.04

    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