Orange G

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  • Identifiers

    CAS number
    1936-15-8

    Molecular formula
    C16H10N2Na2O7S2

    SMILES
    C1=CC=C(C=C1)N=NC2=C(C=CC3=CC(=CC(=C32)S(=O)(=O)[O-])S(=O)(=O)[O-])O.[Na+].[Na+]

  • Odor profile

    Fragrance
    Odorless 81.06%
    Cooked 22.5%
    Bitter 19.72%
    Savory 19.5%
    Burnt 17.81%
    Roasted 16.07%
    Pungent 13.93%
    Clean 12.91%
    Meaty 12.75%
    Grape 12.65%

     

    Flavor
    Bitter 89.35%
    Odorless 32.28%
    Nitrile 20.66%
    Bland 19.6%
    Very strong 18.3%
    Bread crust 18.22%
    Taco 18.17%
    Indole 17.96%
    Roasted peanuts 17.73%
    Moth ball 17.54%

     

    Odor impact est.
    Odorless

  • Properties

    pKa est.
    4.79 (weak acid)

    Molecular weight
    452.4 g/mol

    Melting point expt.

    • 572 to 707 °F (decomposes) (NTP, 1992)

    Flash point

    • 330.52 ˚C est.

    Solubility expt.

    • 50 to 100 mg/mL at 74.3 °F (NTP, 1992)
    • GENERALLY INSOL IN ORGANIC SOLVENTS, BUT SLIGHTLY SOL IN ETHANOL & CELLOSOLVE
    • Solubility in water = 80 mg/ml, in ethanol = 3 mg/ml, in methyl Cellosolve(monomethyl ether of ethylene glycol) = 40 mg/ml.

  • Synonyms

    • Orange G
    • 1936-15-8
    • Acid orange 10
    • C.I. Orange G
    • C.I. Acid Orange 10
    • Light Orange G
    • Acid Orange G
    • Orange G dye
    • Orange GG
    • Acid Orange GG
    • Colacid Orange G
    • Dolkwal Orange G
    • Food Orange GG
    • Hexacol Orange G
    • Orange BPC
    • Orange GMP
    • Acilan Orange GX
    • Food Orange 4
    • Ink Orange JSN
    • Straight Orange G
    • Acid Orange 2G
    • C.I. Food Orange 4
    • Java Orange 2G
    • Apocid Orange 2G
    • Acidal Fast Orange
    • Standacol Orange G
    • Crystal Orange 2G
    • Orange G BPC
    • Certicol Orange GS
    • Brasilan Orange 2G
    • Oranz G [Polish]
    • Acid Fast Orange G
    • Fast Acid Orange G
    • Oranz GG [Czech]
    • Schultz No. 39
    • Acid Light Orange G
    • Acid Light Orange J
    • Fast Light Orange G
    • Kiton Fast Orange G
    • Orange G B.P.C
    • Acid Lightfast Orange
    • Acid Orange Lightfast
    • Amacid Crystal Orange
    • Erio Fast Orange AS
    • C.I. 16230
    • Xylene Fast Orange G
    • Acid Light Orange SX
    • Fast Light Orange GA
    • Acid Fast Orange EGG
    • Bucacid Fast Orange G
    • Hidacid Fast Orange G
    • Orange G (Indicator)
    • 1370 Orange
    • Cetil Light Orange GG
    • Duasyn Acid Orange GG
    • Solar Light Orange GX
    • D&C Orange No. 3
    • Eniacid Light Orange G
    • Intracid Fast Orange G
    • Acid Leather Orange KG
    • C.I. Acid Orange No. 10
    • Fenazo Light Orange 2G
    • Hidacid Fast Orange 2G
    • Sulfacid Light Orange J
    • Neklacid Fast Orange GG
    • Oranz G
    • Acid Leather Orange PGW
    • Hispacid Fast Orange 2G
    • Neklacid Fast Orange 2G
    • Oranz GG
    • Tertracid Light Orange G
    • C.I. Acid Orange 10, disodium salt
    • Oranz kysela 10
    • Vendacid Light Orange 2G
    • Vondacid Light Orange 2G
    • D and C Orange No. 3
    • Fast Light Orange GA-CF
    • Hexacol Orange GG Crystals
    • Oranz kysela 10 [Czech]
    • Naphthalene Fast Orange 2G
    • NCI-C53838
    • Atul Acid Crystal Orange G
    • CI 16230
    • Unitertracid Light Orange G
    • Naphthalene Fast Orange 2GS
    • Acid Light Orange JA Export
    • Naphthalene Orange Solide GG
    • Orange G (Biological Stain)
    • Oranz potravinarska 4
    • CCRIS 881
    • Neklacid Fast Light Orange GG
    • Oranz potravinarska 4 [Czech]
    • Calcocid Fast Light Orange 2G
    • CHEBI:82427
    • HSDB 4348
    • Orange 2G
    • 1,3-Naphthalenedisulfonic acid, 7-hydroxy-8-(phenylazo)-, disodium salt
    • CI 27
    • EINECS 217-705-6
    • Orange #10
    • 1Q6EJU80RN
    • MFCD00012457
    • NSC 10450
    • White mineral oil(petroleum)
    • CI Orange G
    • DTXSID6021082
    • ORANGE G SODIUM
    • Orange G (C.I. 16230)
    • Disodium 7-hydroxy-8-phenylazonaphthalene-1,3-disulphonate
    • ORANGE G [IARC]
    • Orange G, Technical grade
    • CI ORANGE G [IARC]
    • 1-Phenylazo-2-naphthol-6,8-disulfonic acid, disodium salt
    • 1-Phenylazo-2-naphthol-6,8-disulphonic acid, disodium salt
    • Disodium 7-hydroxy-8-(phenylazo)-1,3-naphthalenedisulfonate
    • C.I. ORANGE G [HSDB]
    • 2-Hydroxy-1-phenylazo-6,8-naphthalenedisulfonic acid, disodium salt
    • DTXCID801474349
    • sodium (E)-7-hydroxy-8-(phenyldiazenyl)naphthalene-1,3-disulfonate
    • 7-Hydroxy-8-(phenylazo)-1,3-naphthalenedisulfonic acid, disodium salt
    • 7-Hydroxy-8-(phenylazo)-1,3-naphthalenedisulphonic acid, disodium salt
    • NSC-10450
    • D&C ORANGE NO. 3 (DELISTED)
    • 1082249-82-8
    • 1-Phenylazo-2-naphthol-6,8-disulfonic acid disodium salt
    • disodium;7-hydroxy-8-phenyldiazenylnaphthalene-1,3-disulfonate
    • ORANGE G (IARC)
    • 7-Hydroxy-8-(phenylazo)-1,3-naphthalenedisulfonic acid disodium salt

  • Applications

    Orange G (CAS 1936-15-8) is a synthetic dye used across laboratory and industrial applications: as a histology/cytology staining agent (counterstain to highlight cellular structures); as a tracking dye in polyacrylamide gel electrophoresis for protein and nucleic acid separations (loading dye); as a colorant for textiles, plastics, and coatings to provide stable coloration; and as an intermediate or pigment in the manufacture of dyes and inks.

    gpt-5-nano

  • Solubility @25˚C

    Solvent Solubility (g/L)
    ethanol 4.97
    methanol 8.12
    isopropanol 2.67
    water 0.08
    ethyl acetate 4.42
    n-propanol 3.44
    acetone 17.28
    n-butanol 1.75
    acetonitrile 9.14
    DMF 174.52
    toluene 1.48
    isobutanol 1.43
    1,4-dioxane 18.29
    methyl acetate 10.49
    THF 37.48
    2-butanone 14.57
    n-pentanol 1.43
    sec-butanol 2.48
    n-hexane 0.02
    ethylene glycol 10.82
    NMP 80.97
    cyclohexane 0.05
    DMSO 43.33
    n-butyl acetate 5.21
    n-octanol 3.11
    chloroform 0.93
    n-propyl acetate 5.11
    acetic acid 11.93
    dichloromethane 1.47
    cyclohexanone 13.46
    propylene glycol 9.57
    isopropyl acetate 3.49
    DMAc 121.53
    2-ethoxyethanol 16.85
    isopentanol 1.14
    n-heptane 0.08
    ethyl formate 5.54
    1,2-dichloroethane 1.73
    n-hexanol 1.45
    2-methoxyethanol 49.01
    isobutyl acetate 2.14
    tetrachloromethane 0.06
    n-pentyl acetate 6.34
    transcutol 47.69
    n-heptanol 2.65
    ethylbenzene 0.51
    MIBK 3.44
    2-propoxyethanol 22.49
    tert-butanol 2.17
    MTBE 1.5
    2-butoxyethanol 15.6
    propionic acid 8.27
    o-xylene 0.95
    formic acid 18.18
    diethyl ether 2.33
    m-xylene 0.79
    p-xylene 0.69
    chlorobenzene 1.01
    dimethyl carbonate 12.81
    n-octane 0.07
    formamide 38.51
    cyclopentanone 31.36
    2-pentanone 6.93
    anisole 4.08
    cyclopentyl methyl ether 4.64
    gamma-butyrolactone 35.82
    1-methoxy-2-propanol 31.54
    pyridine 18.17
    3-pentanone 6.02
    furfural 35.07
    n-dodecane 0.11
    diethylene glycol 25.67
    diisopropyl ether 0.41
    tert-amyl alcohol 2.01
    acetylacetone 15.83
    n-hexadecane 0.13
    acetophenone 6.92
    methyl propionate 9.65
    isopentyl acetate 3.49
    trichloroethylene 4.26
    n-nonanol 3.36
    cyclohexanol 1.61
    benzyl alcohol 5.21
    2-ethylhexanol 1.05
    isooctanol 1.72
    dipropyl ether 2.91
    1,2-dichlorobenzene 0.98
    ethyl lactate 7.64
    propylene carbonate 9.05
    n-methylformamide 40.23
    2-pentanol 1.14
    n-pentane 0.03
    1-propoxy-2-propanol 16.25
    1-methoxy-2-propyl acetate 13.15
    2-(2-methoxypropoxy) propanol 16.36
    mesitylene 0.41
    ε-caprolactone 12.22
    p-cymene 0.83
    epichlorohydrin 21.43
    1,1,1-trichloroethane 0.41
    2-aminoethanol 10.29
    morpholine-4-carbaldehyde 92.7
    sulfolane 41.76
    2,2,4-trimethylpentane 0.02
    2-methyltetrahydrofuran 7.07
    n-hexyl acetate 6.48
    isooctane 0.01
    2-(2-butoxyethoxy)ethanol 23.93
    sec-butyl acetate 2.5
    tert-butyl acetate 4.29
    decalin 0.03
    glycerin 27.86
    diglyme 39.65
    acrylic acid 14.4
    isopropyl myristate 3.12
    n-butyric acid 4.78
    acetyl acetate 3.59
    di(2-ethylhexyl) phthalate 3.73
    ethyl propionate 4.07
    nitromethane 41.71
    1,2-diethoxyethane 9.9
    benzonitrile 5.8
    trioctyl phosphate 2.62
    1-bromopropane 0.49
    gamma-valerolactone 69.21
    n-decanol 2.54
    triethyl phosphate 2.44
    4-methyl-2-pentanol 0.57
    propionitrile 5.8
    vinylene carbonate 9.5
    1,1,2-trichlorotrifluoroethane 24.95
    DMS 9.34
    cumene 0.33
    2-octanol 1.97
    2-hexanone 5.25
    octyl acetate 4.43
    limonene 0.97
    1,2-dimethoxyethane 27.01
    ethyl orthosilicate 2.09
    tributyl phosphate 2.78
    diacetone alcohol 11.18
    N,N-dimethylaniline 3.35
    acrylonitrile 14.46
    aniline 3.99
    1,3-propanediol 9.43
    bromobenzene 0.65
    dibromomethane 0.58
    1,1,2,2-tetrachloroethane 3.28
    2-methyl-cyclohexyl acetate 3.76
    tetrabutyl urea 7.13
    diisobutyl methanol 0.8
    2-phenylethanol 5.63
    styrene 0.8
    dioctyl adipate 5.55
    dimethyl sulfate 19.32
    ethyl butyrate 4.43
    methyl lactate 19.68
    butyl lactate 8.96
    diethyl carbonate 2.94
    propanediol butyl ether 18.66
    triethyl orthoformate 4.03
    p-tert-butyltoluene 0.79
    methyl 4-tert-butylbenzoate 11.14
    morpholine 25.28
    tert-butylamine 0.64
    n-dodecanol 1.79
    dimethoxymethane 47.59
    ethylene carbonate 6.46
    cyrene 20.82
    2-ethoxyethyl acetate 15.0
    2-ethylhexyl acetate 2.67
    1,2,4-trichlorobenzene 2.05
    4-methylpyridine 10.78
    dibutyl ether 2.63
    2,6-dimethyl-4-heptanol 0.8
    DEF 16.67
    dimethyl isosorbide 28.96
    tetrachloroethylene 1.53
    eugenol 14.3
    triacetin 13.23
    span 80 12.51
    1,4-butanediol 3.81
    1,1-dichloroethane 0.77
    2-methyl-1-pentanol 0.97
    methyl formate 30.46
    2-methyl-1-butanol 1.27
    n-decane 0.17
    butyronitrile 3.07
    3,7-dimethyl-1-octanol 1.77
    1-chlorooctane 0.82
    1-chlorotetradecane 0.43
    n-nonane 0.13
    undecane 0.14
    tert-butylcyclohexane 0.02
    cyclooctane 0.02
    cyclopentanol 3.57
    tetrahydropyran 5.29
    tert-amyl methyl ether 1.71
    2,5,8-trioxanonane 32.26
    1-hexene 0.14
    2-isopropoxyethanol 8.86
    2,2,2-trifluoroethanol 5.6
    methyl butyrate 5.39

    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