Acid Green 9

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  • Identifiers

    CAS number
    4857-81-2

    Molecular formula
    C37H34ClN2NaO6S2

    SMILES
    CCN(CC1=CC(=CC=C1)S(=O)(=O)[O-])C2=CC=C(C=C2)C(=C3C=CC(=[N+](CC)CC4=CC(=CC=C4)S(=O)(=O)[O-])C=C3)C5=CC=CC=C5Cl.[Na+]

    Safety labels

  • Odor profile

    Fragrance
    Odorless 46.14%
    Fruity 29.16%
    Cooked 22.62%
    Fresh 22.32%
    Savory 22.02%
    Grape 21.7%
    Fatty 20.71%
    Roasted 19.19%
    Bitter 19.09%
    Citrus 18.86%

     

    Flavor
    Bitter 84.67%
    Odorless 25.11%
    Nitrile 20.43%
    Bland 18.16%
    Cedarleaf 18.13%
    Very strong 18.04%
    Oriental 17.88%
    Indole 17.79%
    Lovage 17.72%
    Heather 17.58%

     

    Odor impact est.
    Low

  • Properties

    pKa est.
    4.1 (weak acid)

    Molecular weight
    725.2 g/mol

    Flash point

    • 348.22 ˚C est.

  • Synonyms

    • Acid green 9
    • Indigo Green B
    • Erio green
    • Milling Green
    • Erio Viridine B
    • C.I. Acid Green 9
    • Airedale Green B
    • Fenazo Green XG
    • Folan Green B
    • Kiton Green B
    • Night Green A
    • Acid Brilliant Green 6B
    • Merantine Green B
    • Leather Green 6B
    • Disulphine Green B
    • Neptune Green SGXA
    • Bucacid Fast Green B
    • Hidacid Fast Green B
    • Xylene Fast Green 6B
    • Amacid Milling Green B
    • Brilliant Acid Green B
    • Acid Leather Green KGB
    • Brilliant Acid Green 6B
    • Xylene Milling Green 6B
    • Brilliant Milling Green B
    • Cetil Brilliant Green 6B
    • Milling Brilliant Green B
    • Acilan Brilliant Green 6B
    • Calcocid Milling Green 6B
    • Brilliant Milling Green NS
    • 350YUK2Q7J
    • Aizen Brilliant Acid Green 6BH
    • Mitsui Brilliant Milling Green BX
    • C.I. Acid Green 9, sodium salt
    • C.I. 42100
    • Sumitomo Brilliant Milling Green B
    • NSC 4319
    • NSC 8683
    • EINECS 225-458-0
    • NSC 51540
    • Aizen Brilliant Acid Green 6BH Extra
    • CI 42100
    • Fast Acid Green B (Biological Stain) (VAN)
    • NSC-4319
    • NSC-8683
    • NSC-51540
    • Benzenemethanaminium, N-(4-((2-chlorophenyl)(4-(ethyl((3-sulfophenyl)methyl)amino)phenyl)methylene)-2,5-cyclohexadien-1-ylidene)-N-ethyl-3-sulfo-, inner salt, sodium salt (1:1)
    • Hydrogen (4-((2-chlorophenyl)(4-(ethyl(3-sulphonatobenzyl)amino)phenyl)methylene)cyclohexa-2,5-dien-1-ylidene)(ethyl)(3-sulphonatobenzyl)ammonium, sodium salt
    • Hydrogen [4-[(2-chlorophenyl)[4-[ethyl(3-sulphonatobenzyl)amino]phenyl]methylene]cyclohexa-2,5-dien-1-ylidene](ethyl)(3-sulphonatobenzyl)ammonium, sodium salt
    • Fast Acid Green B (Biological Stain)
    • Benzenemethanaminium, N-[4-[(2-chlorophenyl)[4-[ethyl[(3-sulfophenyl)methyl]amino]phenyl]methylene]-2,5-cyclohexadien-1-ylidene]-N-ethyl-3-sulfo-, inner salt, sodium salt (1:1)
    • RefChem:552611
    • 4857-81-2
    • ALIZARIN GREEN
    • Eriogreen
    • Brilliant Acid Green
    • C.I. Acid Green 9, monosodium salt
    • MFCD00050440
    • Sodium 3-(((4-((2-chlorophenyl)(4-(ethyl(3-sulfonatobenzyl)amino)phenyl)methylene)cyclohexa-2,5-dien-1-ylidene)(ethyl)ammonio)methyl)benzenesulfonate
    • sodium;3-[[4-[(2-chlorophenyl)-[4-[ethyl-[(3-sulfonatophenyl)methyl]azaniumylidene]cyclohexa-2,5-dien-1-ylidene]methyl]-N-ethylanilino]methyl]benzenesulfonate
    • Benzenemethanaminium, N-[4-[(2-chlorophenyl)[4-[ethyl[(3-sulfophenyl)methyl]amino]phenyl]methylene]-2,5-cyclohexadien-1-ylidene]-N-ethyl-3-sulfo-, inner salt, sodium salt
    • Hydrogen 4-(2-chlorophenyl)4-Ethyl(3-sulphonatobenzyl)aminophenylmethylenecyclohexa-2,5-dien-1-ylidene(ethyl)(3-sulphonatobe nzyl)ammonium sodium salt
    • Brilliant Milling Green
    • C37H34ClN2NaO6S2
    • Benzenemethanaminium, N-(4-((2-chlorophenyl)(4-(ethyl((3-sulfophenyl)methyl)amino)phenyl)methylene)-2,5-cyclohexadien-1-ylidene)-N-ethyl-3-sulfo-, inner salt, sodium salt
    • UNII-350YUK2Q7J
    • orb2567102
    • SCHEMBL29375781
    • DTXSID50881402
    • MSK5923
    • SHBDDIJUSNNBLQ-UHFFFAOYSA-M
    • AKOS015916657
    • AC-20177
    • B0791
    • Benzenemethanaminium, N-(4-((2-chlorophenyl)(4-(ethyl((3-sulfophenyl)methyl)amino)phenyl)methylene)-2 ,5-cyclohexadien-1-ylidene)-N-ethyl-3-sulfo-, hydroxide, inner salt, sodium salt
    • Sodium 3-{[{(1E,4E)-4-[(2-chlorophenyl)(4-{ethyl[(3-sulfonatophenyl)methyl]amino}phenyl)methylidene]cyclohexa-2,5-dien-1-ylidene}(ethyl)azaniumyl]methyl}benzene-1-sulfonate
    • sodium;3-[[4-[(2-chlorophenyl)-[4-[ethyl-[(3-sulfonatophenyl)methyl]iminio]cyclohexa-2,5-dien-1-ylidene]methyl]-N-ethyl-anilino]methyl]benzenesulfonate
    • 4857-81-2

  • Applications

    Acid Green 9 (CAS 4857-81-2) is used primarily as a colorant in industrial applications with typical use-cases including textile dyeing for protein fibers such as wool and silk (and potentially nylon under acidic dyeing conditions); a colorant for coatings and printing inks; a colorant for plastics and polymers to produce colored resins and molded parts; a colorant in household products and personal care formulations where regulatory allowances apply; and occasional analytical or laboratory dye applications such as staining or indicator roles in research contexts.

    gpt-5-nano

  • Solubility @25˚C

    Solvent Solubility (g/L)
    ethanol 0.41
    methanol 0.63
    isopropanol 0.23
    water 0.0
    ethyl acetate 0.56
    n-propanol 0.45
    acetone 1.15
    n-butanol 0.31
    acetonitrile 0.31
    DMF 7.84
    toluene 0.25
    isobutanol 0.22
    1,4-dioxane 1.27
    methyl acetate 0.83
    THF 3.58
    2-butanone 1.76
    n-pentanol 0.23
    sec-butanol 0.3
    n-hexane 0.0
    ethylene glycol 0.15
    NMP 9.14
    cyclohexane 0.01
    DMSO 1.87
    n-butyl acetate 0.42
    n-octanol 0.16
    chloroform 4.76
    n-propyl acetate 0.49
    acetic acid 1.04
    dichloromethane 3.0
    cyclohexanone 2.32
    propylene glycol 0.41
    isopropyl acetate 0.38
    DMAc 12.5
    2-ethoxyethanol 1.41
    isopentanol 0.19
    n-heptane 0.0
    ethyl formate 0.77
    1,2-dichloroethane 0.94
    n-hexanol 0.11
    2-methoxyethanol 2.29
    isobutyl acetate 0.25
    tetrachloromethane 0.14
    n-pentyl acetate 0.69
    transcutol 2.2
    n-heptanol 0.18
    ethylbenzene 0.09
    MIBK 0.4
    2-propoxyethanol 1.47
    tert-butanol 0.15
    MTBE 0.23
    2-butoxyethanol 1.27
    propionic acid 0.69
    o-xylene 0.13
    formic acid 0.7
    diethyl ether 0.25
    m-xylene 0.11
    p-xylene 0.12
    chlorobenzene 0.44
    dimethyl carbonate 0.9
    n-octane 0.0
    formamide 1.11
    cyclopentanone 4.1
    2-pentanone 1.01
    anisole 0.55
    cyclopentyl methyl ether 0.52
    gamma-butyrolactone 3.77
    1-methoxy-2-propanol 2.09
    pyridine 2.28
    3-pentanone 0.82
    furfural 4.35
    n-dodecane 0.0
    diethylene glycol 0.76
    diisopropyl ether 0.04
    tert-amyl alcohol 0.22
    acetylacetone 1.48
    n-hexadecane 0.0
    acetophenone 0.89
    methyl propionate 1.02
    isopentyl acetate 0.35
    trichloroethylene 4.71
    n-nonanol 0.18
    cyclohexanol 0.21
    benzyl alcohol 0.71
    2-ethylhexanol 0.08
    isooctanol 0.12
    dipropyl ether 0.21
    1,2-dichlorobenzene 0.46
    ethyl lactate 0.67
    propylene carbonate 1.36
    n-methylformamide 2.15
    2-pentanol 0.14
    n-pentane 0.01
    1-propoxy-2-propanol 1.17
    1-methoxy-2-propyl acetate 1.12
    2-(2-methoxypropoxy) propanol 1.5
    mesitylene 0.04
    ε-caprolactone 2.16
    p-cymene 0.06
    epichlorohydrin 4.19
    1,1,1-trichloroethane 0.58
    2-aminoethanol 0.4
    morpholine-4-carbaldehyde 7.25
    sulfolane 4.55
    2,2,4-trimethylpentane 0.0
    2-methyltetrahydrofuran 0.94
    n-hexyl acetate 0.59
    isooctane 0.0
    2-(2-butoxyethoxy)ethanol 1.42
    sec-butyl acetate 0.28
    tert-butyl acetate 0.38
    decalin 0.0
    glycerin 0.88
    diglyme 2.91
    acrylic acid 0.91
    isopropyl myristate 0.18
    n-butyric acid 0.83
    acetyl acetate 0.45
    di(2-ethylhexyl) phthalate 0.43
    ethyl propionate 0.46
    nitromethane 2.31
    1,2-diethoxyethane 0.64
    benzonitrile 0.6
    trioctyl phosphate 0.22
    1-bromopropane 0.32
    gamma-valerolactone 9.33
    n-decanol 0.11
    triethyl phosphate 0.28
    4-methyl-2-pentanol 0.07
    propionitrile 0.41
    vinylene carbonate 1.72
    1,1,2-trichlorotrifluoroethane 6.04
    DMS 0.68
    cumene 0.04
    2-octanol 0.12
    2-hexanone 0.7
    octyl acetate 0.31
    limonene 0.08
    1,2-dimethoxyethane 2.43
    ethyl orthosilicate 0.25
    tributyl phosphate 0.24
    diacetone alcohol 0.88
    N,N-dimethylaniline 0.37
    acrylonitrile 0.84
    aniline 0.52
    1,3-propanediol 0.56
    bromobenzene 0.37
    dibromomethane 1.0
    1,1,2,2-tetrachloroethane 3.43
    2-methyl-cyclohexyl acetate 0.37
    tetrabutyl urea 0.54
    diisobutyl methanol 0.05
    2-phenylethanol 0.46
    styrene 0.14
    dioctyl adipate 0.48
    dimethyl sulfate 1.67
    ethyl butyrate 0.44
    methyl lactate 1.39
    butyl lactate 0.96
    diethyl carbonate 0.29
    propanediol butyl ether 1.13
    triethyl orthoformate 0.46
    p-tert-butyltoluene 0.05
    methyl 4-tert-butylbenzoate 1.04
    morpholine 2.13
    tert-butylamine 0.06
    n-dodecanol 0.07
    dimethoxymethane 2.7
    ethylene carbonate 0.98
    cyrene 2.15
    2-ethoxyethyl acetate 1.57
    2-ethylhexyl acetate 0.27
    1,2,4-trichlorobenzene 0.85
    4-methylpyridine 1.59
    dibutyl ether 0.15
    2,6-dimethyl-4-heptanol 0.05
    DEF 1.98
    dimethyl isosorbide 2.09
    tetrachloroethylene 1.58
    eugenol 1.39
    triacetin 1.1
    span 80 1.11
    1,4-butanediol 0.23
    1,1-dichloroethane 0.82
    2-methyl-1-pentanol 0.16
    methyl formate 1.54
    2-methyl-1-butanol 0.24
    n-decane 0.01
    butyronitrile 0.38
    3,7-dimethyl-1-octanol 0.11
    1-chlorooctane 0.06
    1-chlorotetradecane 0.02
    n-nonane 0.01
    undecane 0.0
    tert-butylcyclohexane 0.0
    cyclooctane 0.0
    cyclopentanol 0.43
    tetrahydropyran 0.68
    tert-amyl methyl ether 0.24
    2,5,8-trioxanonane 2.02
    1-hexene 0.03
    2-isopropoxyethanol 0.71
    2,2,2-trifluoroethanol 0.47
    methyl butyrate 0.75

    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