C.I. Acid Blue 9

Overview IFRA Request a quote

  • Identifiers

    CAS number
    2650-18-2

    Molecular formula
    C37H42N4O9S3

    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=C5S(=O)(=O)[O-].[NH4+].[NH4+]

    Safety labels

    Irritant
    Irritant

  • Odor profile

    Fragrance
    Odorless 58.45%
    Cooked 22.93%
    Fruity 22.66%
    Savory 21.98%
    Roasted 19.59%
    Bitter 18.76%
    Fresh 17.6%
    Grape 17.25%
    Meaty 16.37%
    Green 16.19%

     

    Flavor
    Bitter 86.13%
    Odorless 25.79%
    Nitrile 20.23%
    Bland 18.55%
    Cedarleaf 17.72%
    Very strong 17.7%
    Oriental 17.6%
    Lovage 17.5%
    Indole 17.47%
    Taco 17.35%

     

    Odor impact est.
    Low

  • Properties

    pKa est.
    2.95 (strong acid)

    Molecular weight
    783.0 g/mol

    Flash point

    • 393.04 ˚C est.

    Solubility expt.

    • Soluble in water (5% at 20 °C and 98 °C) and in ethanol

  • Synonyms

    • C.I. Acid Blue 9
    • Erioglaucine A
    • Alphazurine FG
    • Erioglaucine
    • Erioglaucine E
    • Japan Blue 205
    • Alphazurine FGND
    • Neptune Blue WF
    • Fenazo Blue XR
    • Patent Blue AE
    • Calcocid Blue EG
    • Kiton Blue AR
    • Xylene Blue VSG
    • Neptune Blue BRA
    • Patent Blue 2Y
    • Calcocid Blue 2G
    • Tortrazine C extra
    • Water Blue 9
    • Bucacid Azure Blue
    • Hidacid Azure Blue
    • Acid Blue AE-SF
    • Bleu Brilliant FCF
    • Brilliant Blue Lake
    • Kiton Pure Blue L
    • Pro-Jet Blue OAM
    • Erioglaucine (VAN)
    • Daiwa Blue 109H
    • Eriosky Blue
    • Amacid Blue FG Conc
    • Duasyn Acid Blue AE
    • Orient Water Blue 9
    • Schultz No. 770
    • CI Direct Brown 78
    • Edicol Supra Blue E6
    • Vitasyn Blue AE 85
    • Caswell No. 007A
    • AF Blue No. 1
    • Alphazurine (indicator)
    • Peacock Blue X-1756
    • A.F. Blue No. 1
    • Acilan Turquoise Blue AE
    • Aizen Brilliant Blue FCF
    • CI ACID BLUE 9
    • D and C Blue No. 4
    • Duasyn Acid Blue AE-SF
    • Maple Brilliant Blue FCF
    • C.I. Direct Brown 78
    • CI Acid Blue 9, diammonium salt
    • Triantine Light Brown 3RN
    • C.I. Acid Blue 9, diammonium salt
    • CCRIS 887
    • HK Formula No. K 7117
    • Neptune Blue Bra Concentration
    • Disulphine Lake Blue EG
    • Erioglaucine (Biological Stain)
    • HSDB 5890
    • AE 85
    • H.K. Formula No. K. 7117
    • 11388 Blue
    • NSC 4318
    • NSC 5018
    • EINECS 220-168-0
    • CI Direct Brown 78, diammonium salt
    • EPA Pesticide Chemical Code 110301
    • CI 42090 (Ammonium salt)
    • acid blue 9 ammonium
    • C.I. Direct Brown 78, Diammonium Salt
    • AI3-52484
    • 86R7G3C26F
    • ACID BLUE 9 AMMONIUM SALT
    • 3QKW4AM9I0
    • BLUE NO. 205
    • DTXSID4034310
    • KEMACID BRILLIANT BLUE FCF
    • NSC-4318
    • NSC-5018
    • C.I. ACID BLUE 9 [HSDB]
    • Ammonium, ethyl(4-(p-(ethyl(m-sulfobenzyl)amino)-alpha-(o-sulfophenyl)benzylidene)-2,5-cyclohexadien-1-ylidene)(m-sulfobenzyl)-, hydroxide, inner salt, diammonium salt
    • Benzenemethanaminium, N-ethyl-N-(4-((4-(ethyl((3-sulfophenyl)methyl)amino)phenyl)(2-sulfophenyl)methylene)-2,5-cyclohexadien-1-ylidene)-3-sulfo-, hydroxide, inner salt, diammonium salt
    • Benzenemethanaminium, N-ethyl-N-(4-((4-(ethyl((3-sulfophenyl)methyl)amino)phenyl)(2-sulfophenyl)methylene)-2,5-cyclohexadien-1-ylidene)-3-sulfo-, inner salt, ammonium salt (1:2)
    • Benzenemethanaminium, N-ethyl-N-(4-((4-(ethyl((3-sulfophenyl)methyl)amino)phenyl)(2-sulfophenyl)methylene)-2,5-cyclohexadien-1-ylidene)-3-sulfo-, inner salt, diammonium salt
    • Diammonio(ethyl)(4-((4-(ethyl(3-sulphonatobenzyl)amino)phenyl)(2-sulphonatophenyl)methylene)cyclohexa-2,5-dien-1-ylidene)(3-sulphonatobenzyl)ammonium
    • ALPHAZURINE [INDICATOR]
    • BENZENEMETHANAMINIUM, N-ETHYL-N-[4-[[4-[ETHYL[(3-SULFOPHENYL)METHYL]AMINO]PHENYL](2-SULFOPHENYL)METHYLENE]-2,5-CYCLOHEXADIEN-1-YLIDENE]-3-SULFO-, INNER SALT, DIAMMONIUM SALT
    • Diammonio(ethyl)[4-[[4-[ethyl(3-sulphonatobenzyl)amino]phenyl](2-sulphonatophenyl)methylene]cyclohexa-2,5-dien-1-ylidene](3-sulphonatobenzyl)ammonium
    • DIAMMONIUM N-ETHYL-N-(4-((4-(ETHYL((3-SULFOPHENYL)METHYL)AMINO)PHENYL)(2-SULFOPHENYL)METHYLENE)-2,5-CYCLOHEXADIEN-1-YLIDENE)-3-SULFOBENZENEMETHANAMINIUM
    • DIAMMONIUM N-ETHYL-N-(4-((4-(ETHYL((3-SULFOPHENYL)METHYL)AMINO)PHENYL)(2-SULFOPHENYL)METHYLENE)-2,5-CYCLOHEXADIEN-1-YLIDENE)-3-SULFOBENZENEMETHANAMINIUM, INNER SALT
    • DIAMMONIUM SALT OF ETHYL(4-(P-(ETHYL(M-SULFOBENZYL)AMINO)-.ALPHA.-(O-SULFOPHENYL)BENZYLIDENE)-2,5-CYCLO-HEXADIEN-1-YLIDENE) M-SULFOBENZYL AMMONIUM
    • ProJet Blue OAM
    • Acid Blue AESF
    • Benzenemethanaminium, N-ethyl-N-[4-[[4-[ethyl[(3-sulfophenyl)methyl]amino]phenyl](2-sulfophenyl)methylene]-2,5-cyclohexadien-1-ylidene]-3-sulfo-, inner salt, ammonium salt (1:2)
    • Peacock Blue X1756
    • Duasyn Acid Blue AESF
    • RefChem:572029
    • AF BLUE NO 1
    • SCHULTZ NO 770
    • D AND C BLUE NO 1
    • D AND C BLUE NO 4
    • PEACOCK BLUE X 1756
    • DTXCID2014310
    • HK FORMULA NO K 7117
    • CI 671
    • ACID BLUE 9 AMMONIUM SALT [INCI]
    • C.I. Acid Blue 9, diammonium salt (8CI)
    • Ammonium, ethyl(4(p(ethyl(msulfobenzyl)amino)alpha(osulfophenyl)benzylidene)2,5cyclohexadien1ylidene)(msulfobenzyl), hydroxide, inner salt, diammonium salt
    • BENZENEMETHANAMINIUM, N-ETHYL-N-(4-((4-(ETHYL((3-SULFOPHENYL)METHYL)AMINO)PHENYL)(2-SULFOPHENYL) METHYLENE)-2,5-CYCLOHEXADIEN-1-YLIDENE)-3-SULFO-, HYDROXIDE, INNER SALT, DIAMMONIUM SALT
    • Benzenemethanaminium, NethylN(4((4(ethyl((3sulfophenyl)methyl)amino)phenyl)(2sulfophenyl)methylene)2,5cyclohexadien1ylidene)3sulfo, hydroxide, inner salt, diammonium salt
    • Benzenemethanaminium, NethylN(4((4(ethyl((3sulfophenyl)methyl)amino)phenyl)(2sulfophenyl)methylene)2,5cyclohexadien1ylidene)3sulfo, inner salt, ammonium salt (1:2)
    • Diammonio(ethyl)(4((4(ethyl(3sulphonatobenzyl)amino)phenyl)(2sulphonatophenyl)methylene)cyclohexa2,5dien1ylidene)(3sulphonatobenzyl)ammonium
    • DIAMMONIUM SALT OF ETHYL(4-(P-(ETHYL(M-SULFOBENZYL)AMINO)-ALPHA-(O-SULFOPHENYL)BENZYLIDENE)-2,5-CYCLO-HEXADIEN-1-YLIDENE) M-SULFOBENZYL AMMONIUM
    • 2650-18-2
    • Acid Sky Blue A
    • Dolkwal Brilliant Blue
    • MFCD00198069
    • C.I. 42090
    • Acid Blue 9 (Technical Grade)
    • ammonium 2-((E)-(4-(ethyl(3-sulfonatobenzyl)amino)phenyl)((E)-4-(ethyl(3-sulfonatobenzyl)iminio)cyclohexa-2,5-dien-1-ylidene)methyl)benzenesulfonate
    • Diammonio(ethyl)4-4-ethyl(3-sulphonatobenzyl)aminophenyl(2-sulphonatophenyl)methylenecyclohexa-2,5-dien-1-ylidene(3-sulphona tobenzyl)ammonium
    • CI 42090
    • UNII-86R7G3C26F
    • Brilliant Blue, diammonium salt
    • Acid Blue 9, tech.
    • CHEBI:138824
    • MSK158580M
    • AKOS015894991
    • AT49698
    • FA41142
    • 2650-18-2

  • Applications

    C.I. Acid Blue 9 (CAS 2650-18-2) is primarily used as an acid dye for protein fibers and acid-dyeable synthetics, imparting fast, bright color to fibers such as wool, silk, and nylon; it also serves as a staining dye in histology and microbiology for microscopic visualization; in industrial applications it is used as a colorant for coatings and printing inks; it can function as a dye intermediate or precursor for other colorants; and it is used in leather finishing to provide uniform coloration.

    gpt-5-nano

  • Solubility @25˚C

    Solvent Solubility (g/L)
    ethanol 0.58
    methanol 1.16
    isopropanol 0.29
    water 0.0
    ethyl acetate 0.9
    n-propanol 0.55
    acetone 1.68
    n-butanol 0.33
    acetonitrile 0.62
    DMF 15.18
    toluene 0.26
    isobutanol 0.23
    1,4-dioxane 1.7
    methyl acetate 1.54
    THF 4.38
    2-butanone 2.32
    n-pentanol 0.2
    sec-butanol 0.33
    n-hexane 0.0
    ethylene glycol 0.34
    NMP 18.66
    cyclohexane 0.01
    DMSO 3.96
    n-butyl acetate 0.47
    n-octanol 0.12
    chloroform 4.89
    n-propyl acetate 0.52
    acetic acid 2.31
    dichloromethane 3.49
    cyclohexanone 2.56
    propylene glycol 0.74
    isopropyl acetate 0.45
    DMAc 20.6
    2-ethoxyethanol 1.54
    isopentanol 0.17
    n-heptane 0.0
    ethyl formate 1.16
    1,2-dichloroethane 1.25
    n-hexanol 0.11
    2-methoxyethanol 3.48
    isobutyl acetate 0.19
    tetrachloromethane 0.17
    n-pentyl acetate 0.56
    transcutol 1.92
    n-heptanol 0.15
    ethylbenzene 0.07
    MIBK 0.37
    2-propoxyethanol 1.68
    tert-butanol 0.18
    MTBE 0.23
    2-butoxyethanol 1.18
    propionic acid 1.49
    o-xylene 0.14
    formic acid 1.93
    diethyl ether 0.34
    m-xylene 0.11
    p-xylene 0.09
    chlorobenzene 0.46
    dimethyl carbonate 1.89
    n-octane 0.0
    formamide 3.01
    cyclopentanone 5.64
    2-pentanone 1.11
    anisole 0.45
    cyclopentyl methyl ether 0.62
    gamma-butyrolactone 6.71
    1-methoxy-2-propanol 2.6
    pyridine 2.94
    3-pentanone 1.08
    furfural 6.69
    n-dodecane 0.0
    diethylene glycol 1.18
    diisopropyl ether 0.04
    tert-amyl alcohol 0.25
    acetylacetone 1.88
    n-hexadecane 0.0
    acetophenone 0.83
    methyl propionate 1.7
    isopentyl acetate 0.3
    trichloroethylene 5.64
    n-nonanol 0.13
    cyclohexanol 0.25
    benzyl alcohol 0.62
    2-ethylhexanol 0.07
    isooctanol 0.09
    dipropyl ether 0.2
    1,2-dichlorobenzene 0.45
    ethyl lactate 0.77
    propylene carbonate 2.27
    n-methylformamide 4.73
    2-pentanol 0.14
    n-pentane 0.01
    1-propoxy-2-propanol 1.16
    1-methoxy-2-propyl acetate 1.21
    2-(2-methoxypropoxy) propanol 1.28
    mesitylene 0.04
    ε-caprolactone 2.59
    p-cymene 0.05
    epichlorohydrin 5.28
    1,1,1-trichloroethane 0.67
    2-aminoethanol 0.72
    morpholine-4-carbaldehyde 11.02
    sulfolane 8.65
    2,2,4-trimethylpentane 0.0
    2-methyltetrahydrofuran 1.01
    n-hexyl acetate 0.48
    isooctane 0.0
    2-(2-butoxyethoxy)ethanol 1.22
    sec-butyl acetate 0.26
    tert-butyl acetate 0.39
    decalin 0.0
    glycerin 1.76
    diglyme 2.79
    acrylic acid 2.35
    isopropyl myristate 0.13
    n-butyric acid 1.29
    acetyl acetate 0.78
    di(2-ethylhexyl) phthalate 0.34
    ethyl propionate 0.54
    nitromethane 5.65
    1,2-diethoxyethane 0.55
    benzonitrile 0.58
    trioctyl phosphate 0.18
    1-bromopropane 0.33
    gamma-valerolactone 11.53
    n-decanol 0.08
    triethyl phosphate 0.3
    4-methyl-2-pentanol 0.06
    propionitrile 0.65
    vinylene carbonate 2.94
    1,1,2-trichlorotrifluoroethane 9.45
    DMS 0.97
    cumene 0.03
    2-octanol 0.08
    2-hexanone 0.57
    octyl acetate 0.25
    limonene 0.07
    1,2-dimethoxyethane 2.44
    ethyl orthosilicate 0.24
    tributyl phosphate 0.19
    diacetone alcohol 0.97
    N,N-dimethylaniline 0.31
    acrylonitrile 1.5
    aniline 0.65
    1,3-propanediol 0.87
    bromobenzene 0.37
    dibromomethane 1.15
    1,1,2,2-tetrachloroethane 4.07
    2-methyl-cyclohexyl acetate 0.31
    tetrabutyl urea 0.43
    diisobutyl methanol 0.04
    2-phenylethanol 0.42
    styrene 0.11
    dioctyl adipate 0.37
    dimethyl sulfate 4.0
    ethyl butyrate 0.46
    methyl lactate 2.64
    butyl lactate 0.88
    diethyl carbonate 0.34
    propanediol butyl ether 0.91
    triethyl orthoformate 0.43
    p-tert-butyltoluene 0.04
    methyl 4-tert-butylbenzoate 0.94
    morpholine 2.87
    tert-butylamine 0.06
    n-dodecanol 0.05
    dimethoxymethane 4.27
    ethylene carbonate 1.56
    cyrene 2.26
    2-ethoxyethyl acetate 1.42
    2-ethylhexyl acetate 0.25
    1,2,4-trichlorobenzene 0.9
    4-methylpyridine 1.89
    dibutyl ether 0.1
    2,6-dimethyl-4-heptanol 0.04
    DEF 2.86
    dimethyl isosorbide 2.05
    tetrachloroethylene 1.95
    eugenol 1.19
    triacetin 1.12
    span 80 0.93
    1,4-butanediol 0.28
    1,1-dichloroethane 0.92
    2-methyl-1-pentanol 0.13
    methyl formate 3.47
    2-methyl-1-butanol 0.24
    n-decane 0.01
    butyronitrile 0.45
    3,7-dimethyl-1-octanol 0.08
    1-chlorooctane 0.05
    1-chlorotetradecane 0.01
    n-nonane 0.0
    undecane 0.0
    tert-butylcyclohexane 0.0
    cyclooctane 0.0
    cyclopentanol 0.55
    tetrahydropyran 0.76
    tert-amyl methyl ether 0.24
    2,5,8-trioxanonane 1.81
    1-hexene 0.03
    2-isopropoxyethanol 0.69
    2,2,2-trifluoroethanol 1.35
    methyl butyrate 0.82

    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