Solvent Yellow 18

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  • Identifiers

    CAS number
    6407-78-9

    Molecular formula
    C18H18N4O

    SMILES
    CC1=CC(=C(C=C1)N=NC2C(=NN(C2=O)C3=CC=CC=C3)C)C

    Safety labels

  • Odor profile

    Fragrance
    Roasted 35.73%
    Nutty 27.93%
    Fruity 26.73%
    Cooked 25.44%
    Odorless 25.35%
    Meaty 24.93%
    Burnt 23.87%
    Bitter 23.48%
    Popcorn 23.13%
    Grape 21.93%

     

    Flavor
    Bitter 78.91%
    Odorless 23.64%
    Roasted 23.01%
    Nitrile 20.3%
    Bread crust 20.15%
    Taco 20.05%
    Very strong 19.97%
    Roasted peanuts 19.74%
    Indole 19.55%
    Cedarleaf 19.48%

     

    Odor impact est.
    Odorless

  • Properties

    XLogP3-AA
    4.0

    pKa est.
    4.46 (weak acid)

    Molecular weight
    306.4 g/mol

    Vapor pressure est.

    • hPa @ 20°C
    • hPa @ 25°C

    Evaporation rate
    Ultra slow

    Boiling point est.
    535°C

    Flash point

    • 197.82 ˚C est.

  • Synonyms

    • 6407-78-9
    • SOLVENT YELLOW 18
    • C.I. Solvent yellow 18
    • 4-[(2,4-dimethylphenyl)azo]-2,4-dihydro-5-methyl-2-phenyl-3h-pyrazol-3-one
    • UNII-L4SQI4K87S
    • EINECS 229-043-5
    • 4-((2,4-Dimethylphenyl)azo)-2,4-dihydro-5-methyl-2-phenyl-3H-pyrazol-3-one
    • L4SQI4K87S
    • DTXSID10863784
    • 3H-Pyrazol-3-one, 4-(2-(2,4-dimethylphenyl)diazenyl)-2,4-dihydro-5-methyl-2-phenyl-
    • 3H-Pyrazol-3-one, 4-[2-(2,4-dimethylphenyl)diazenyl]-2,4-dihydro-5-methyl-2-phenyl-
    • RefChem:184255
    • Solvent Yellow 18 [INCI]
    • DTXCID60812363
    • 16335-63-0
    • C.i. food Yellow 12
    • CI 12740
    • 4-[(2,4-dimethylphenyl)diazenyl]-5-methyl-2-phenyl-4H-pyrazol-3-one
    • MFCD03696522
    • 3H-Pyrazol-3-one, 4-((2,4-dimethylphenyl)azo)-2,4-dihydro-5-methyl-2-phenyl-
    • 3H-Pyrazol-3-one, 4-[(2,4-dimethylphenyl)azo]-2,4-dihydro-5-methyl-2-phenyl-
    • 4-[(2,4-dimethylphenyl)diazenyl]-5-methyl-2-phenyl-2,4-dihydro-3H-pyrazol-3-one
    • 4-((2,4-Dimethylphenyl)diazenyl)-5-methyl-2-phenyl-2,4-dihydro-3H-pyrazol-3-one
    • SCHEMBL1689490
    • SCHEMBL1689492
    • SCHEMBL1689493
    • KLQVCADYSBUVAV-UHFFFAOYSA-N
    • HY-D0421
    • FS171012
    • CS-0010472
    • NS00046942
    • 407S789
    • AG-690/36537063
    • 4-(2,4-dimethylphenyl)azo-5-methyl-2-phenyl-4H-pyrazol-3-one
    • 6407-78-9

  • Applications

    Solvent Yellow 18, CAS 6407-78-9, is a solvent-soluble dye used as a colorant in solvent-based formulations. Typical applications include coloring solvent-based inks (flexographic and gravure) and general solvent-based printing inks, coatings and paints for industrial and automotive finishes, coloring for plastics and polymer formulations, and colorant in adhesive systems. It may also be used to color lubricants or other industrial fluids. Use is subject to local regulations and formulation limits.

    gpt-5-nano

  • Solubility @25˚C

    Solvent Solubility (g/L)
    ethanol 29.48
    methanol 32.98
    isopropanol 18.61
    water 0.04
    ethyl acetate 201.94
    n-propanol 30.97
    acetone 360.28
    n-butanol 33.52
    acetonitrile 200.72
    DMF 501.07
    toluene 225.08
    isobutanol 25.07
    1,4-dioxane 218.08
    methyl acetate 241.88
    THF 640.41
    2-butanone 309.77
    n-pentanol 31.1
    sec-butanol 27.51
    n-hexane 2.2
    ethylene glycol 9.13
    NMP 522.65
    cyclohexane 4.86
    DMSO 344.2
    n-butyl acetate 97.41
    n-octanol 7.69
    chloroform 1426.32
    n-propyl acetate 108.72
    acetic acid 144.64
    dichloromethane 1686.09
    cyclohexanone 417.45
    propylene glycol 15.18
    isopropyl acetate 103.45
    DMAc 573.16
    2-ethoxyethanol 88.14
    isopentanol 39.12
    n-heptane 1.38
    ethyl formate 127.48
    1,2-dichloroethane 923.05
    n-hexanol 29.04
    2-methoxyethanol 136.31
    isobutyl acetate 60.7
    tetrachloromethane 48.24
    n-pentyl acetate 50.59
    transcutol 371.44
    n-heptanol 13.96
    ethylbenzene 60.93
    MIBK 104.81
    2-propoxyethanol 99.88
    tert-butanol 25.98
    MTBE 45.87
    2-butoxyethanol 52.58
    propionic acid 85.13
    o-xylene 68.37
    formic acid 53.43
    diethyl ether 77.97
    m-xylene 80.34
    p-xylene 78.64
    chlorobenzene 458.65
    dimethyl carbonate 180.31
    n-octane 0.58
    formamide 134.84
    cyclopentanone 688.01
    2-pentanone 213.44
    anisole 162.61
    cyclopentyl methyl ether 195.28
    gamma-butyrolactone 702.5
    1-methoxy-2-propanol 100.58
    pyridine 558.52
    3-pentanone 197.22
    furfural 626.06
    n-dodecane 0.57
    diethylene glycol 78.46
    diisopropyl ether 15.6
    tert-amyl alcohol 30.98
    acetylacetone 329.67
    n-hexadecane 0.72
    acetophenone 184.13
    methyl propionate 227.77
    isopentyl acetate 84.81
    trichloroethylene 2231.89
    n-nonanol 9.1
    cyclohexanol 54.39
    benzyl alcohol 118.34
    2-ethylhexanol 22.76
    isooctanol 13.54
    dipropyl ether 32.16
    1,2-dichlorobenzene 359.29
    ethyl lactate 60.42
    propylene carbonate 310.69
    n-methylformamide 188.28
    2-pentanol 23.34
    n-pentane 1.65
    1-propoxy-2-propanol 64.95
    1-methoxy-2-propyl acetate 128.95
    2-(2-methoxypropoxy) propanol 78.86
    mesitylene 29.65
    ε-caprolactone 308.92
    p-cymene 23.47
    epichlorohydrin 1255.58
    1,1,1-trichloroethane 447.82
    2-aminoethanol 20.64
    morpholine-4-carbaldehyde 428.91
    sulfolane 657.4
    2,2,4-trimethylpentane 1.89
    2-methyltetrahydrofuran 308.2
    n-hexyl acetate 59.36
    isooctane 1.15
    2-(2-butoxyethoxy)ethanol 89.92
    sec-butyl acetate 68.08
    tert-butyl acetate 92.05
    decalin 4.07
    glycerin 33.87
    diglyme 230.62
    acrylic acid 126.99
    isopropyl myristate 23.44
    n-butyric acid 110.15
    acetyl acetate 164.13
    di(2-ethylhexyl) phthalate 39.07
    ethyl propionate 110.59
    nitromethane 523.85
    1,2-diethoxyethane 90.41
    benzonitrile 211.99
    trioctyl phosphate 19.36
    1-bromopropane 227.83
    gamma-valerolactone 665.58
    n-decanol 6.98
    triethyl phosphate 46.09
    4-methyl-2-pentanol 19.07
    propionitrile 119.27
    vinylene carbonate 314.74
    1,1,2-trichlorotrifluoroethane 469.91
    DMS 138.52
    cumene 29.26
    2-octanol 7.62
    2-hexanone 117.47
    octyl acetate 31.99
    limonene 29.93
    1,2-dimethoxyethane 193.06
    ethyl orthosilicate 38.11
    tributyl phosphate 30.2
    diacetone alcohol 105.66
    N,N-dimethylaniline 74.74
    acrylonitrile 228.73
    aniline 205.92
    1,3-propanediol 35.36
    bromobenzene 532.25
    dibromomethane 784.47
    1,1,2,2-tetrachloroethane 1257.07
    2-methyl-cyclohexyl acetate 68.33
    tetrabutyl urea 40.26
    diisobutyl methanol 13.87
    2-phenylethanol 91.59
    styrene 100.76
    dioctyl adipate 52.28
    dimethyl sulfate 312.57
    ethyl butyrate 78.14
    methyl lactate 107.56
    butyl lactate 46.72
    diethyl carbonate 64.25
    propanediol butyl ether 37.7
    triethyl orthoformate 50.81
    p-tert-butyltoluene 19.46
    methyl 4-tert-butylbenzoate 84.55
    morpholine 258.56
    tert-butylamine 13.99
    n-dodecanol 5.48
    dimethoxymethane 278.81
    ethylene carbonate 228.68
    cyrene 114.11
    2-ethoxyethyl acetate 105.02
    2-ethylhexyl acetate 67.33
    1,2,4-trichlorobenzene 451.5
    4-methylpyridine 528.2
    dibutyl ether 19.88
    2,6-dimethyl-4-heptanol 13.87
    DEF 236.52
    dimethyl isosorbide 180.17
    tetrachloroethylene 571.4
    eugenol 87.66
    triacetin 101.42
    span 80 52.38
    1,4-butanediol 17.92
    1,1-dichloroethane 613.08
    2-methyl-1-pentanol 39.56
    methyl formate 202.74
    2-methyl-1-butanol 38.04
    n-decane 0.91
    butyronitrile 97.25
    3,7-dimethyl-1-octanol 14.68
    1-chlorooctane 9.58
    1-chlorotetradecane 3.96
    n-nonane 0.74
    undecane 0.7
    tert-butylcyclohexane 2.94
    cyclooctane 1.41
    cyclopentanol 71.88
    tetrahydropyran 210.72
    tert-amyl methyl ether 44.98
    2,5,8-trioxanonane 139.0
    1-hexene 19.18
    2-isopropoxyethanol 61.66
    2,2,2-trifluoroethanol 88.95
    methyl butyrate 150.06

    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