2-Chloro-4-[(E)-(1-methyl-1H-pyrazol-5-yl)diazenyl]phenol

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  • Identifiers

    CAS number
    1184721-10-5

    Molecular formula
    C10H9ClN4O

    SMILES
    CN1C(=CC=N1)N=NC2=CC(=C(C=C2)O)Cl

    Safety labels

  • Odor profile

    Fragrance
    Odorless 53.45%
    Burnt 35.92%
    Roasted 33.92%
    Meaty 30.42%
    Savory 26.62%
    Cooked 25.24%
    Bitter 23.16%
    Nutty 19.57%
    Vanilla 18.02%
    Smoky 17.74%

     

    Flavor
    Bitter 86.15%
    Odorless 35.2%
    Roasted 24.14%
    Bread crust 21.01%
    Scallion 20.49%
    Very strong 20.42%
    Nitrile 20.32%
    Taco 20.07%
    Roasted peanuts 19.98%
    Cereal 19.72%

     

    Odor impact est.
    Low

  • Properties

    XLogP3-AA
    2.6

    pKa est.
    4.96 (weak acid)

    Molecular weight
    236.66 g/mol

    Vapor pressure est.

    • hPa @ 20°C
    • hPa @ 25°C

    Evaporation rate
    Ultra slow

    Boiling point est.
    377°C

    Flash point

    • 196.76 ˚C est.

  • Synonyms

    • SCHEMBL15049243
    • SCHEMBL16232517
    • CLLDCLHNLJUKGQ-BUHFOSPRSA-N
    • CLLDCLHNLJUKGQ-UHFFFAOYSA-N
    • DTXSID601186148
    • 2-Chloro-4-[(E)-(1-methyl-1H-pyrazol-5-yl)diazenyl]phenol
    • 2-Chloro-4-[(1E)-2-(1-methyl-1H-pyrazol-5-yl)diazenyl]phenol
    • 1184721-10-5
    • 1184721-10-5

  • Applications

    2-Chloro-4-[(E)-(1-methyl-1H-pyrazol-5-yl)diazenyl]phenol (CAS 1184721-10-5) is primarily employed as an intermediate in the synthesis of azo colorants; typical real-world applications include dyes and pigments for coatings and inks, colorant masterbatches for plastics and other polymers, and specialty coatings where chromophore stability is important, with potential use as a color additive in adhesives, subject to regulatory limits.

    gpt-5-nano

  • Solubility @25˚C

    Solvent Solubility (g/L)
    ethanol 37.56
    methanol 44.66
    isopropanol 28.73
    water 0.13
    ethyl acetate 51.08
    n-propanol 35.36
    acetone 94.5
    n-butanol 27.82
    acetonitrile 56.97
    DMF 64.49
    toluene 17.14
    isobutanol 21.36
    1,4-dioxane 132.75
    methyl acetate 82.65
    THF 250.66
    2-butanone 119.05
    n-pentanol 29.86
    sec-butanol 40.05
    n-hexane 0.34
    ethylene glycol 14.91
    NMP 23.08
    cyclohexane 0.84
    DMSO 131.24
    n-butyl acetate 21.64
    n-octanol 7.03
    chloroform 73.87
    n-propyl acetate 34.5
    acetic acid 45.67
    dichloromethane 100.44
    cyclohexanone 63.05
    propylene glycol 26.1
    isopropyl acetate 22.48
    DMAc 208.22
    2-ethoxyethanol 120.38
    isopentanol 24.77
    n-heptane 0.96
    ethyl formate 41.23
    1,2-dichloroethane 49.66
    n-hexanol 14.85
    2-methoxyethanol 146.33
    isobutyl acetate 17.92
    tetrachloromethane 3.77
    n-pentyl acetate 14.4
    transcutol 244.58
    n-heptanol 9.81
    ethylbenzene 9.64
    MIBK 25.09
    2-propoxyethanol 59.23
    tert-butanol 38.7
    MTBE 30.99
    2-butoxyethanol 34.62
    propionic acid 26.67
    o-xylene 10.3
    formic acid 33.52
    diethyl ether 23.51
    m-xylene 7.64
    p-xylene 18.94
    chlorobenzene 21.1
    dimethyl carbonate 28.64
    n-octane 0.47
    formamide 97.9
    cyclopentanone 69.34
    2-pentanone 49.18
    anisole 50.5
    cyclopentyl methyl ether 29.14
    gamma-butyrolactone 69.58
    1-methoxy-2-propanol 78.93
    pyridine 115.06
    3-pentanone 42.59
    furfural 107.12
    n-dodecane 0.57
    diethylene glycol 63.07
    diisopropyl ether 4.78
    tert-amyl alcohol 39.67
    acetylacetone 66.14
    n-hexadecane 0.67
    acetophenone 51.69
    methyl propionate 46.77
    isopentyl acetate 22.89
    trichloroethylene 121.24
    n-nonanol 8.43
    cyclohexanol 24.72
    benzyl alcohol 45.87
    2-ethylhexanol 10.74
    isooctanol 9.12
    dipropyl ether 13.79
    1,2-dichlorobenzene 18.05
    ethyl lactate 22.47
    propylene carbonate 34.38
    n-methylformamide 47.82
    2-pentanol 18.54
    n-pentane 0.34
    1-propoxy-2-propanol 37.1
    1-methoxy-2-propyl acetate 36.92
    2-(2-methoxypropoxy) propanol 53.18
    mesitylene 4.35
    ε-caprolactone 51.45
    p-cymene 6.14
    epichlorohydrin 135.85
    1,1,1-trichloroethane 26.24
    2-aminoethanol 32.82
    morpholine-4-carbaldehyde 99.0
    sulfolane 53.16
    2,2,4-trimethylpentane 0.61
    2-methyltetrahydrofuran 75.24
    n-hexyl acetate 15.68
    isooctane 0.31
    2-(2-butoxyethoxy)ethanol 65.73
    sec-butyl acetate 21.81
    tert-butyl acetate 24.05
    decalin 0.78
    glycerin 40.25
    diglyme 135.38
    acrylic acid 28.32
    isopropyl myristate 9.76
    n-butyric acid 30.41
    acetyl acetate 26.96
    di(2-ethylhexyl) phthalate 14.0
    ethyl propionate 28.47
    nitromethane 134.49
    1,2-diethoxyethane 57.17
    benzonitrile 36.52
    trioctyl phosphate 8.26
    1-bromopropane 16.97
    gamma-valerolactone 130.3
    n-decanol 7.11
    triethyl phosphate 16.29
    4-methyl-2-pentanol 10.07
    propionitrile 43.07
    vinylene carbonate 37.29
    1,1,2-trichlorotrifluoroethane 95.47
    DMS 25.41
    cumene 6.65
    2-octanol 6.68
    2-hexanone 45.67
    octyl acetate 12.12
    limonene 7.99
    1,2-dimethoxyethane 176.93
    ethyl orthosilicate 15.26
    tributyl phosphate 10.87
    diacetone alcohol 44.36
    N,N-dimethylaniline 31.29
    acrylonitrile 58.58
    aniline 41.25
    1,3-propanediol 45.9
    bromobenzene 18.54
    dibromomethane 41.68
    1,1,2,2-tetrachloroethane 76.04
    2-methyl-cyclohexyl acetate 20.59
    tetrabutyl urea 18.37
    diisobutyl methanol 7.59
    2-phenylethanol 30.97
    styrene 14.65
    dioctyl adipate 19.15
    dimethyl sulfate 40.69
    ethyl butyrate 22.41
    methyl lactate 31.76
    butyl lactate 17.05
    diethyl carbonate 18.48
    propanediol butyl ether 29.9
    triethyl orthoformate 20.69
    p-tert-butyltoluene 5.63
    methyl 4-tert-butylbenzoate 27.78
    morpholine 153.23
    tert-butylamine 13.41
    n-dodecanol 5.94
    dimethoxymethane 101.16
    ethylene carbonate 29.11
    cyrene 46.93
    2-ethoxyethyl acetate 34.81
    2-ethylhexyl acetate 16.84
    1,2,4-trichlorobenzene 26.71
    4-methylpyridine 69.51
    dibutyl ether 13.06
    2,6-dimethyl-4-heptanol 7.59
    DEF 48.79
    dimethyl isosorbide 72.02
    tetrachloroethylene 38.69
    eugenol 35.9
    triacetin 29.89
    span 80 29.16
    1,4-butanediol 23.71
    1,1-dichloroethane 36.02
    2-methyl-1-pentanol 27.88
    methyl formate 45.9
    2-methyl-1-butanol 25.25
    n-decane 0.75
    butyronitrile 35.34
    3,7-dimethyl-1-octanol 10.31
    1-chlorooctane 3.43
    1-chlorotetradecane 2.12
    n-nonane 0.59
    undecane 0.64
    tert-butylcyclohexane 0.72
    cyclooctane 0.31
    cyclopentanol 25.53
    tetrahydropyran 72.87
    tert-amyl methyl ether 25.43
    2,5,8-trioxanonane 102.51
    1-hexene 3.41
    2-isopropoxyethanol 60.44
    2,2,2-trifluoroethanol 23.43
    methyl butyrate 42.34

    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