E 111

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  • Identifiers

    CAS number
    2347-72-0

    Molecular formula
    C16H10N2Na2O7S2

    SMILES
    C1=CC(=CC(=C1)S(=O)(=O)[O-])N=NC2=C(C=CC3=C2C=CC(=C3)S(=O)(=O)[O-])O.[Na+].[Na+]

    Safety labels

  • Odor profile

    Fragrance
    Odorless 82.33%
    Cooked 23.44%
    Savory 20.74%
    Bitter 19.08%
    Burnt 18.71%
    Roasted 17.6%
    Meaty 14.02%
    Pungent 13.6%
    Sulfurous 12.66%
    Clean 12.4%

     

    Flavor
    Bitter 89.53%
    Odorless 32.61%
    Nitrile 20.35%
    Bland 20.28%
    Very strong 18.3%
    Bread crust 18.05%
    Taco 17.98%
    Indole 17.95%
    Roasted peanuts 17.51%
    Moth ball 17.39%

     

    Odor impact est.
    Low

  • Properties

    pKa est.
    4.62 (weak acid)

    Molecular weight
    452.4 g/mol

    Flash point

    • 315.63 ˚C est.

  • Synonyms

    • E 111
    • 6-Hydroxy-5-((3-sulfophenyl)azo)-2-naphthalenesulfonic acid, disodium salt
    • RefChem:599596
    • E-111
    • Food orange 2
    • 2347-72-0
    • CI 15980
    • C.I. FOOD ORANGE 2
    • C.I. 15980
    • disodium;6-hydroxy-5-[(3-sulfonatophenyl)diazenyl]naphthalene-2-sulfonate
    • 2-Naphthalenesulfonicacid, 6-hydroxy-5-[2-(3-sulfophenyl)diazenyl]-, sodium salt (1:2)
    • 35HF83708U
    • disodium 6-hydroxy-5-[(3-sulphonatophenyl)azo]naphthalene-2-sulphonate
    • Disodium 6-hydroxy-5-((3-sulphonatophenyl)azo)naphthalene-2-sulphonate
    • 85283-70-1
    • UNII-35HF83708U
    • EINECS 219-073-7
    • EINECS 286-599-1
    • SCHEMBL342135
    • SCHEMBL1507664
    • SCHEMBL29859739
    • DTXSID90893685
    • FABGVTFMFVQCBO-DDVLFWKVSA-L
    • FOOD ORANGE 2 (E 111)
    • 6-Hydroxy-5-((3-sulphophenyl)azo)naphthalene-2-sulphonic acid, sodium salt
    • DB-230277
    • NS00013480
    • Q929052
    • Disodium 6-hydroxy-5-((3-sulfophenyl)azo)-2-naphthalenesulfonate
    • 6-Hydroxy-5-[(3-sulfophenyl)azo]naphthalene-2-sulfonic acid,sodium salt
    • DISODIUM 6-HYDROXY-5-((3-SULFOPHENYL)AZO)-2- NAPHTHALENESULFONATE
    • 2-Naphthalenesulfonic acid, 6-hydroxy-5-((3-sulfophenyl)azo)-, disodium salt
    • Disodium 6-hydroxy-5-[(E)-(3-sulfonatophenyl)diazenyl]naphthalene-2-sulfonate
    • 2-NAPHTHALENESULFONIC ACID, 6-HYDROXY-5-(2-(3-SULFOPHENYL)DIAZENYL)-, SODIUM SALT (1:2)
    • 2347-72-0

  • Applications

    E 111 (CAS 2347-72-0) has practical applications as a solvent and processing aid in industrial manufacturing, and is sometimes used as an intermediate in organic synthesis. In the polymers/plastics sector, it may serve as a processing aid and additive to improve processing and material properties. In coatings and inks, E 111 is used as a solvent or formulation additive to enhance solubility and uniformity. In adhesives, it can function as a solvent or a component of the formulation. In cleaning formulations, it can act as a solvent or formulation aid to improve cleaning performance. Use depends on local regulations and formulation limits.

    gpt-5-nano

  • Solubility @25˚C

    Solvent Solubility (g/L)
    ethanol 3.31
    methanol 4.14
    isopropanol 2.42
    water 0.02
    ethyl acetate 4.77
    n-propanol 3.13
    acetone 22.32
    n-butanol 2.12
    acetonitrile 5.23
    DMF 71.17
    toluene 0.95
    isobutanol 1.35
    1,4-dioxane 21.37
    methyl acetate 9.17
    THF 45.78
    2-butanone 19.9
    n-pentanol 1.55
    sec-butanol 3.54
    n-hexane 0.01
    ethylene glycol 2.52
    NMP 21.34
    cyclohexane 0.04
    DMSO 23.62
    n-butyl acetate 4.28
    n-octanol 4.41
    chloroform 0.78
    n-propyl acetate 4.31
    acetic acid 6.16
    dichloromethane 1.02
    cyclohexanone 15.38
    propylene glycol 3.29
    isopropyl acetate 3.68
    DMAc 66.56
    2-ethoxyethanol 14.78
    isopentanol 1.25
    n-heptane 0.04
    ethyl formate 4.09
    1,2-dichloroethane 1.1
    n-hexanol 1.33
    2-methoxyethanol 35.99
    isobutyl acetate 1.34
    tetrachloromethane 0.04
    n-pentyl acetate 7.05
    transcutol 51.98
    n-heptanol 2.55
    ethylbenzene 0.32
    MIBK 3.29
    2-propoxyethanol 17.13
    tert-butanol 2.15
    MTBE 2.13
    2-butoxyethanol 12.21
    propionic acid 3.95
    o-xylene 0.57
    formic acid 5.12
    diethyl ether 2.55
    m-xylene 0.45
    p-xylene 0.43
    chlorobenzene 0.57
    dimethyl carbonate 5.29
    n-octane 0.06
    formamide 16.42
    cyclopentanone 30.28
    2-pentanone 8.91
    anisole 2.52
    cyclopentyl methyl ether 3.44
    gamma-butyrolactone 22.18
    1-methoxy-2-propanol 20.26
    pyridine 13.26
    3-pentanone 5.67
    furfural 14.64
    n-dodecane 0.1
    diethylene glycol 13.59
    diisopropyl ether 0.4
    tert-amyl alcohol 2.72
    acetylacetone 17.72
    n-hexadecane 0.12
    acetophenone 3.85
    methyl propionate 6.71
    isopentyl acetate 2.8
    trichloroethylene 2.73
    n-nonanol 4.75
    cyclohexanol 2.15
    benzyl alcohol 2.58
    2-ethylhexanol 0.77
    isooctanol 1.43
    dipropyl ether 1.95
    1,2-dichlorobenzene 0.46
    ethyl lactate 3.48
    propylene carbonate 4.43
    n-methylformamide 18.11
    2-pentanol 1.38
    n-pentane 0.02
    1-propoxy-2-propanol 12.1
    1-methoxy-2-propyl acetate 8.46
    2-(2-methoxypropoxy) propanol 12.7
    mesitylene 0.22
    ε-caprolactone 11.48
    p-cymene 0.44
    epichlorohydrin 16.93
    1,1,1-trichloroethane 0.33
    2-aminoethanol 3.86
    morpholine-4-carbaldehyde 42.6
    sulfolane 16.49
    2,2,4-trimethylpentane 0.01
    2-methyltetrahydrofuran 7.36
    n-hexyl acetate 7.83
    isooctane 0.01
    2-(2-butoxyethoxy)ethanol 22.81
    sec-butyl acetate 2.08
    tert-butyl acetate 4.11
    decalin 0.02
    glycerin 9.32
    diglyme 33.51
    acrylic acid 4.34
    isopropyl myristate 3.35
    n-butyric acid 3.92
    acetyl acetate 3.04
    di(2-ethylhexyl) phthalate 2.35
    ethyl propionate 2.86
    nitromethane 25.54
    1,2-diethoxyethane 12.97
    benzonitrile 3.27
    trioctyl phosphate 2.04
    1-bromopropane 0.39
    gamma-valerolactone 56.4
    n-decanol 3.3
    triethyl phosphate 1.11
    4-methyl-2-pentanol 0.55
    propionitrile 3.92
    vinylene carbonate 4.31
    1,1,2-trichlorotrifluoroethane 11.68
    DMS 5.2
    cumene 0.18
    2-octanol 2.5
    2-hexanone 6.17
    octyl acetate 4.81
    limonene 0.54
    1,2-dimethoxyethane 24.88
    ethyl orthosilicate 1.09
    tributyl phosphate 2.22
    diacetone alcohol 9.56
    N,N-dimethylaniline 1.52
    acrylonitrile 7.65
    aniline 2.36
    1,3-propanediol 6.93
    bromobenzene 0.35
    dibromomethane 0.44
    1,1,2,2-tetrachloroethane 2.23
    2-methyl-cyclohexyl acetate 2.06
    tetrabutyl urea 6.3
    diisobutyl methanol 0.63
    2-phenylethanol 3.37
    styrene 0.45
    dioctyl adipate 4.35
    dimethyl sulfate 5.7
    ethyl butyrate 2.95
    methyl lactate 8.28
    butyl lactate 7.28
    diethyl carbonate 1.6
    propanediol butyl ether 15.02
    triethyl orthoformate 2.7
    p-tert-butyltoluene 0.44
    methyl 4-tert-butylbenzoate 5.97
    morpholine 27.4
    tert-butylamine 0.54
    n-dodecanol 2.17
    dimethoxymethane 28.79
    ethylene carbonate 3.45
    cyrene 7.8
    2-ethoxyethyl acetate 13.74
    2-ethylhexyl acetate 1.89
    1,2,4-trichlorobenzene 0.85
    4-methylpyridine 6.53
    dibutyl ether 3.92
    2,6-dimethyl-4-heptanol 0.63
    DEF 11.89
    dimethyl isosorbide 16.88
    tetrachloroethylene 1.07
    eugenol 8.1
    triacetin 7.94
    span 80 9.31
    1,4-butanediol 2.07
    1,1-dichloroethane 0.63
    2-methyl-1-pentanol 1.02
    methyl formate 12.29
    2-methyl-1-butanol 1.52
    n-decane 0.17
    butyronitrile 2.91
    3,7-dimethyl-1-octanol 2.0
    1-chlorooctane 0.98
    1-chlorotetradecane 0.42
    n-nonane 0.12
    undecane 0.13
    tert-butylcyclohexane 0.01
    cyclooctane 0.02
    cyclopentanol 3.32
    tetrahydropyran 7.3
    tert-amyl methyl ether 2.06
    2,5,8-trioxanonane 25.36
    1-hexene 0.09
    2-isopropoxyethanol 7.5
    2,2,2-trifluoroethanol 2.4
    methyl butyrate 4.28

    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