2-(2-(4-(Dimethylamino)phenyl)diazenyl)-1,3-dimethyl-1H-imidazolium chloride (1:1)

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  • Identifiers

    CAS number
    77061-58-6

    Molecular formula
    C13H18ClN5

    SMILES
    CN1C=C[N+](=C1N=NC2=CC=C(C=C2)N(C)C)C.[Cl-]

    Safety labels

    Irritant
    Irritant

    Environmental Hazard
    Environmental

  • Odor profile

    Fragrance
    Roasted 42.02%
    Nutty 34.96%
    Burnt 30.43%
    Sweet 29.97%
    Meaty 27.11%
    Earthy 27.07%
    Animal 25.64%
    Musty 24.95%
    Grape 24.31%
    Hazelnut 23.95%

     

    Flavor
    Bitter 64.14%
    Roasted 26.38%
    Odorless 24.63%
    Roasted peanuts 21.02%
    Bread crust 20.83%
    Nitrile 20.62%
    Green pepper 20.61%
    Carrot 20.5%
    Very strong 20.4%
    Taco 20.35%

     

    Odor impact est.
    Low

  • Properties

    pKa est.
    3.7 (weak acid)

    Molecular weight
    279.77 g/mol

    Flash point

    • 182.11 ˚C est.

  • Synonyms

    • Basic Red 51
    • 77061-58-6
    • A7A946JJ6I
    • COLOREX BR51
    • VIBRACOLOR RUBY RED
    • 1016649-33-4
    • 2-(2-(4-(Dimethylamino)phenyl)diazenyl)-1,3-dimethyl-1H-imidazolium chloride (1:1)
    • 2-[2-[4-(Dimethylamino)phenyl]diazenyl]-1,3-dimethyl-1H-imidazolium chloride (1:1)
    • RefChem:561092
    • 278-601-4
    • 12270-25-6
    • C.I. Basic Red 51
    • 2-[[4-(dimethylamino)phenyl]azo]-1,3-dimethyl-1h-imidazolium chloride
    • Ruby Red
    • BASICRED51
    • 2-((4-(Dimethylamino)phenyl)azo)-1,3-dimethyl-1H-imidazolium chloride
    • 1H-Imidazolium, 2-[[4-(dimethylamino)phenyl]azo]-1,3-dimethyl-, chloride
    • 4-[(1,3-dimethylimidazol-1-ium-2-yl)diazenyl]-N,N-dimethylaniline;chloride
    • 1H-Imidazolium,2-[2-[4-(dimethylamino)phenyl]diazenyl]-1,3-dimethyl-, chloride (1:1)
    • Basic Red 51 (Technical Grade)
    • 1H-Imidazolium, 2-((4-(dimethylamino)phenyl)azo)-1,3-dimethyl-, chloride
    • 1H-Imidazolium, 2-(2-(4-(dimethylamino)phenyl)diazenyl)-1,3-dimethyl-, chloride (1:1)
    • 1H-Imidazolium, 2-[2-[4-(dimethylamino)phenyl]diazenyl]-1,3-dimethyl-, chloride (1:1)
    • UNII-A7A946JJ6I
    • 2-((4-(Dimethylamino)phenyl)diazenyl)-1,3-dimethyl-1H-imidazol-3-ium chloride
    • 2-{[4-(Dimethylamino)phenyl]diazenyl}-1,3-dimethyl-1H-imidazol-3-ium chloride
    • rojo basico 51
    • EINECS 278-601-4
    • rosso di base 51
    • rouge de base 51
    • vermelho basico 51
    • CI BASIC RED 51
    • SCHEMBL334242
    • SCHEMBL334243
    • MIP RED 2985
    • SCHEMBL1435632
    • DTXSID80874049
    • MSK5902
    • NZDXSXLYLMHYJA-UHFFFAOYSA-M
    • MFCD19442859
    • AKOS037643593
    • AS-17151
    • DB-216840
    • G79174
    • Q27273724
    • 4-(1,3-dimethylimidazol-1-ium-2-yl)azo-N,N-dimethyl-aniline;chloride
    • 2-[2-[4-(Dimethylamino)phenyl]diazenyl]-1,3-dimethyl-1H-imidazolium chloride
    • 2-{2-[4-(dimethylamino)phenyl]diazen-1-yl}-1,3-dimethyl-1H-imidazol-3-ium chloride
    • 1H-Imidazolium, 2-[(1E)-2-[4-(dimethylamino)phenyl]diazenyl]-1,3-dimethyl-, chloride (1:1)
    • 2-(4-(DIMETHYLAMINO-PHENYLAZO)-1,3-DIMETHYL-1,3-DIMETHYL-3H-IMIDAZOL- 1-IUM CHLORIDE
    • 77061-58-6

  • Applications

    2-(2-(4-(Dimethylamino)phenyl)diazenyl)-1,3-dimethyl-1H-imidazolium chloride (1:1) (CAS 77061-58-6) is a cationic azo dye commonly used as a colorant in industrial formulations. Its imidazolium-based cation and azo linkage provide bright coloration and good substrate adhesion, supporting applications in textiles with enhanced dye uptake on negatively charged fibers, printing inks, coatings, and plastics. It also serves as an intermediate in the synthesis of related dyes and colorants, enabling derivatization to tailor hue or solubility. In specialty contexts, it may be evaluated for use in dye-containing paper formulations or in dye-sensitized/electrochromic materials, and can function as a pH-sensitive indicator in analytical contexts; all uses are subject to local regulations and formulation limits.

    gpt-5-nano

  • Solubility @25˚C

    Solvent Solubility (g/L)
    ethanol 115.63
    methanol 180.2
    isopropanol 51.46
    water 15.86
    ethyl acetate 110.24
    n-propanol 71.7
    acetone 134.64
    n-butanol 59.26
    acetonitrile 132.41
    DMF 230.8
    toluene 96.54
    isobutanol 53.75
    1,4-dioxane 181.68
    methyl acetate 130.33
    THF 253.95
    2-butanone 110.18
    n-pentanol 44.92
    sec-butanol 49.59
    n-hexane 1.99
    ethylene glycol 57.94
    NMP 192.5
    cyclohexane 7.07
    DMSO 281.84
    n-butyl acetate 55.75
    n-octanol 8.09
    chloroform 1033.61
    n-propyl acetate 57.46
    acetic acid 456.41
    dichloromethane 1139.8
    cyclohexanone 179.5
    propylene glycol 45.74
    isopropyl acetate 49.22
    DMAc 258.5
    2-ethoxyethanol 137.96
    isopentanol 53.2
    n-heptane 2.03
    ethyl formate 163.67
    1,2-dichloroethane 414.51
    n-hexanol 34.4
    2-methoxyethanol 284.69
    isobutyl acetate 34.48
    tetrachloromethane 102.4
    n-pentyl acetate 25.34
    transcutol 182.87
    n-heptanol 17.56
    ethylbenzene 26.27
    MIBK 39.63
    2-propoxyethanol 104.67
    tert-butanol 55.04
    MTBE 39.56
    2-butoxyethanol 58.24
    propionic acid 121.1
    o-xylene 47.01
    formic acid 495.71
    diethyl ether 46.17
    m-xylene 45.11
    p-xylene 48.76
    chlorobenzene 199.8
    dimethyl carbonate 75.66
    n-octane 0.74
    formamide 677.06
    cyclopentanone 216.68
    2-pentanone 70.96
    anisole 68.12
    cyclopentyl methyl ether 84.17
    gamma-butyrolactone 300.42
    1-methoxy-2-propanol 113.2
    pyridine 325.48
    3-pentanone 66.49
    furfural 468.42
    n-dodecane 0.6
    diethylene glycol 114.3
    diisopropyl ether 10.15
    tert-amyl alcohol 52.92
    acetylacetone 122.04
    n-hexadecane 0.69
    acetophenone 89.08
    methyl propionate 96.81
    isopentyl acetate 51.66
    trichloroethylene 1073.69
    n-nonanol 9.05
    cyclohexanol 69.13
    benzyl alcohol 100.1
    2-ethylhexanol 20.8
    isooctanol 14.92
    dipropyl ether 19.46
    1,2-dichlorobenzene 173.88
    ethyl lactate 40.21
    propylene carbonate 181.0
    n-methylformamide 210.32
    2-pentanol 28.94
    n-pentane 2.35
    1-propoxy-2-propanol 52.75
    1-methoxy-2-propyl acetate 69.68
    2-(2-methoxypropoxy) propanol 49.09
    mesitylene 20.48
    ε-caprolactone 154.19
    p-cymene 16.02
    epichlorohydrin 473.14
    1,1,1-trichloroethane 325.25
    2-aminoethanol 97.2
    morpholine-4-carbaldehyde 235.69
    sulfolane 288.46
    2,2,4-trimethylpentane 2.46
    2-methyltetrahydrofuran 151.5
    n-hexyl acetate 25.36
    isooctane 1.17
    2-(2-butoxyethoxy)ethanol 64.06
    sec-butyl acetate 33.11
    tert-butyl acetate 45.79
    decalin 3.09
    glycerin 104.47
    diglyme 152.69
    acrylic acid 185.76
    isopropyl myristate 10.35
    n-butyric acid 163.57
    acetyl acetate 116.04
    di(2-ethylhexyl) phthalate 24.69
    ethyl propionate 48.35
    nitromethane 599.27
    1,2-diethoxyethane 46.08
    benzonitrile 107.47
    trioctyl phosphate 12.5
    1-bromopropane 109.32
    gamma-valerolactone 324.87
    n-decanol 6.9
    triethyl phosphate 34.15
    4-methyl-2-pentanol 19.25
    propionitrile 77.82
    vinylene carbonate 234.91
    1,1,2-trichlorotrifluoroethane 465.18
    DMS 54.36
    cumene 17.98
    2-octanol 7.89
    2-hexanone 46.2
    octyl acetate 15.65
    limonene 20.21
    1,2-dimethoxyethane 154.75
    ethyl orthosilicate 32.61
    tributyl phosphate 17.28
    diacetone alcohol 69.39
    N,N-dimethylaniline 44.49
    acrylonitrile 135.12
    aniline 158.68
    1,3-propanediol 138.29
    bromobenzene 189.73
    dibromomethane 499.23
    1,1,2,2-tetrachloroethane 684.94
    2-methyl-cyclohexyl acetate 44.98
    tetrabutyl urea 21.61
    diisobutyl methanol 11.16
    2-phenylethanol 72.9
    styrene 37.65
    dioctyl adipate 24.03
    dimethyl sulfate 133.29
    ethyl butyrate 45.68
    methyl lactate 65.04
    butyl lactate 28.06
    diethyl carbonate 43.91
    propanediol butyl ether 30.76
    triethyl orthoformate 37.16
    p-tert-butyltoluene 14.41
    methyl 4-tert-butylbenzoate 49.29
    morpholine 203.71
    tert-butylamine 27.98
    n-dodecanol 5.27
    dimethoxymethane 136.83
    ethylene carbonate 157.51
    cyrene 87.08
    2-ethoxyethyl acetate 53.47
    2-ethylhexyl acetate 40.06
    1,2,4-trichlorobenzene 223.13
    4-methylpyridine 234.72
    dibutyl ether 9.47
    2,6-dimethyl-4-heptanol 11.16
    DEF 102.13
    dimethyl isosorbide 102.8
    tetrachloroethylene 456.66
    eugenol 56.53
    triacetin 42.3
    span 80 37.62
    1,4-butanediol 47.43
    1,1-dichloroethane 327.54
    2-methyl-1-pentanol 48.27
    methyl formate 215.22
    2-methyl-1-butanol 54.11
    n-decane 0.86
    butyronitrile 77.09
    3,7-dimethyl-1-octanol 11.76
    1-chlorooctane 5.79
    1-chlorotetradecane 2.55
    n-nonane 0.72
    undecane 0.7
    tert-butylcyclohexane 2.46
    cyclooctane 1.85
    cyclopentanol 82.07
    tetrahydropyran 114.22
    tert-amyl methyl ether 36.46
    2,5,8-trioxanonane 95.56
    1-hexene 10.38
    2-isopropoxyethanol 70.42
    2,2,2-trifluoroethanol 284.74
    methyl butyrate 75.57

    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