Pigment Red 7

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  • Identifiers

    CAS number
    6471-51-8

    Molecular formula
    C25H19Cl2N3O2

    SMILES
    CC1=C(C=CC(=C1)Cl)NC(=O)C2=CC3=CC=CC=C3C(=C2O)N=NC4=C(C=C(C=C4)Cl)C

    Safety labels

  • Odor profile

    Fragrance
    Fruity 46.23%
    Grape 40.94%
    Floral 32.85%
    Odorless 31.27%
    Neroli 29.95%
    Animal 26.1%
    Fatty 25.16%
    Citrus 23.46%
    Bitter 23.11%
    Cooked 23.1%

     

    Flavor
    Bitter 88.68%
    Odorless 35.83%
    Mild 21.01%
    Nitrile 20.55%
    Very strong 20.36%
    Bland 20.04%
    Indole 19.85%
    Sweet-like 19.57%
    Orange flower 19.07%
    Cedarleaf 18.82%

     

    Odor impact est.
    Odorless

  • Properties

    XLogP3-AA
    8.0

    pKa est.
    6.76 (neutral)

    Molecular weight
    464.3 g/mol

    Vapor pressure est.

    • hPa @ 20°C
    • hPa @ 25°C

    Evaporation rate
    Ultra slow

    Boiling point est.
    850°C

    Flash point

    • 259.55 ˚C est.

  • Synonyms

    • 6471-51-8
    • CI 12420
    • EINECS 229-315-3
    • 2-Naphthalenecarboxamide, N-(4-chloro-2-methylphenyl)-4-[(4-chloro-2-methylphenyl)azo]-3-hydroxy-
    • 5Z5A89AQ44
    • PERMANENT CARMINE
    • PERMANENT CRIMSON
    • DTXSID5064382
    • NAPHTHOL CRIMSON RED AS-TR
    • 2-Naphthalenecarboxamide, N-(4-chloro-2-methylphenyl)-4-((4-chloro-2-methylphenyl)azo)-3-hydroxy-
    • 2-Naphthalenecarboxamide, N-(4-chloro-2-methylphenyl)-4-(2-(4-chloro-2-methylphenyl)diazenyl)-3-hydroxy-
    • 2-Naphthalenecarboxamide, N-(4-chloro-2-methylphenyl)-4-[2-(4-chloro-2-methylphenyl)diazenyl]-3-hydroxy-
    • RefChem:863212
    • DTXCID9044374
    • CI 12420 [INCI]
    • 2-Naphthalenecarboxamide, N-(4-chloro-2-methylphenyl)-4-((4-chloro-2-methylphenyl)azo)-3-hy-droxy-
    • N-(4-Chloro-2-methylphenyl)-4-((4-chloro-2-methylphenyl)azo)-3-hy-droxy-2-naphthalenecarboxamide
    • N-(4-chloro-2-methylphenyl)-4-[(4-chloro-2-methylphenyl)azo]-3-hydroxynaphthalene-2-carboxamide
    • N-(4-chloro-2-methylphenyl)-4-[(4-chloro-2-methylphenyl)diazenyl]-3-hydroxynaphthalene-2-carboxamide
    • UNII-5Z5A89AQ44
    • N-(4-Chloro-2-methylphenyl)-4-((4-chloro-2-methylphenyl)azo)-3-hydroxynaphthalene-2-carboxamide
    • SCHEMBL341968
    • SCHEMBL8991595
    • SCHEMBL16323771
    • SCHEMBL29353549
    • KWORKYDIARWARF-UHFFFAOYSA-N
    • N-(4-Chloro-2-methylphenyl)-4-((4-chloro-2-methylphenyl)azo)-3-hy- droxy-2-naphthalenecarboxamide
    • DB-299987
    • NS00047862
    • Q27263080
    • (E)-N-(4-chloro-2-methylphenyl)-4-((4-chloro-2-methylphenyl)diazenyl)-3-hydroxy-2-naphthamide
    • 2-Naphthalenecarboxamide, N-(4-chloro-2-methylphenyl)-4-((4-chloro-2-methylphenyl)azo)-3-hy- droxy-
    • 6471-51-8

  • Applications

    Pigment Red 7 (CAS 6471-51-8) is an organic colorant primarily used to impart color in coatings and inks, delivering a rich red hue for industrial paints, decorative coatings, and printing inks. It is commonly dispersed in plastics and polymers as a colorant for molded parts, packaging, and decorative articles. Depending on regulatory approvals, it may be evaluated for use in cosmetics/personal care formulations as a colorant. It may also be dispersed in household products and adhesives where color is required, serving as a stable pigment in composite material systems.

    gpt-5-nano

  • Solubility @25˚C

    Solvent Solubility (g/L)
    ethanol 0.38
    methanol 0.32
    isopropanol 0.33
    water 0.0
    ethyl acetate 2.91
    n-propanol 0.63
    acetone 1.92
    n-butanol 0.67
    acetonitrile 0.32
    DMF 6.91
    toluene 3.3
    isobutanol 0.44
    1,4-dioxane 6.17
    methyl acetate 2.77
    THF 32.78
    2-butanone 4.99
    n-pentanol 0.73
    sec-butanol 0.75
    n-hexane 0.04
    ethylene glycol 0.07
    NMP 11.35
    cyclohexane 0.03
    DMSO 2.63
    n-butyl acetate 3.49
    n-octanol 0.5
    chloroform 21.9
    n-propyl acetate 2.83
    acetic acid 1.71
    dichloromethane 14.69
    cyclohexanone 8.3
    propylene glycol 0.28
    isopropyl acetate 2.57
    DMAc 18.89
    2-ethoxyethanol 2.58
    isopentanol 0.73
    n-heptane 0.06
    ethyl formate 1.35
    1,2-dichloroethane 4.6
    n-hexanol 0.79
    2-methoxyethanol 3.23
    isobutyl acetate 1.89
    tetrachloromethane 0.43
    n-pentyl acetate 3.17
    transcutol 13.92
    n-heptanol 0.74
    ethylbenzene 1.24
    MIBK 2.31
    2-propoxyethanol 5.43
    tert-butanol 0.5
    MTBE 1.65
    2-butoxyethanol 3.64
    propionic acid 1.22
    o-xylene 1.28
    formic acid 0.47
    diethyl ether 1.11
    m-xylene 1.34
    p-xylene 1.35
    chlorobenzene 3.94
    dimethyl carbonate 2.86
    n-octane 0.03
    formamide 0.81
    cyclopentanone 14.49
    2-pentanone 3.51
    anisole 4.84
    cyclopentyl methyl ether 4.51
    gamma-butyrolactone 14.59
    1-methoxy-2-propanol 3.8
    pyridine 11.61
    3-pentanone 2.87
    furfural 15.61
    n-dodecane 0.03
    diethylene glycol 1.97
    diisopropyl ether 0.39
    tert-amyl alcohol 0.97
    acetylacetone 6.75
    n-hexadecane 0.04
    acetophenone 5.35
    methyl propionate 3.67
    isopentyl acetate 3.38
    trichloroethylene 31.64
    n-nonanol 0.72
    cyclohexanol 0.9
    benzyl alcohol 2.76
    2-ethylhexanol 0.86
    isooctanol 0.82
    dipropyl ether 1.99
    1,2-dichlorobenzene 3.82
    ethyl lactate 2.22
    propylene carbonate 6.01
    n-methylformamide 1.72
    2-pentanol 0.57
    n-pentane 0.03
    1-propoxy-2-propanol 4.77
    1-methoxy-2-propyl acetate 9.41
    2-(2-methoxypropoxy) propanol 6.92
    mesitylene 0.5
    ε-caprolactone 8.88
    p-cymene 0.83
    epichlorohydrin 26.23
    1,1,1-trichloroethane 3.8
    2-aminoethanol 0.28
    morpholine-4-carbaldehyde 15.09
    sulfolane 15.05
    2,2,4-trimethylpentane 0.06
    2-methyltetrahydrofuran 7.58
    n-hexyl acetate 2.61
    isooctane 0.03
    2-(2-butoxyethoxy)ethanol 6.29
    sec-butyl acetate 2.6
    tert-butyl acetate 3.77
    decalin 0.06
    glycerin 0.73
    diglyme 14.3
    acrylic acid 1.44
    isopropyl myristate 1.52
    n-butyric acid 2.27
    acetyl acetate 2.4
    di(2-ethylhexyl) phthalate 2.14
    ethyl propionate 3.11
    nitromethane 5.14
    1,2-diethoxyethane 5.1
    benzonitrile 2.44
    trioctyl phosphate 1.12
    1-bromopropane 2.09
    gamma-valerolactone 28.61
    n-decanol 0.52
    triethyl phosphate 2.31
    4-methyl-2-pentanol 0.53
    propionitrile 0.79
    vinylene carbonate 5.87
    1,1,2-trichlorotrifluoroethane 16.67
    DMS 4.78
    cumene 0.66
    2-octanol 0.6
    2-hexanone 3.38
    octyl acetate 1.72
    limonene 1.13
    1,2-dimethoxyethane 7.94
    ethyl orthosilicate 2.17
    tributyl phosphate 1.42
    diacetone alcohol 4.72
    N,N-dimethylaniline 2.99
    acrylonitrile 1.47
    aniline 3.07
    1,3-propanediol 0.66
    bromobenzene 4.75
    dibromomethane 5.17
    1,1,2,2-tetrachloroethane 18.72
    2-methyl-cyclohexyl acetate 3.5
    tetrabutyl urea 2.57
    diisobutyl methanol 0.78
    2-phenylethanol 3.21
    styrene 1.56
    dioctyl adipate 3.39
    dimethyl sulfate 6.19
    ethyl butyrate 3.55
    methyl lactate 2.94
    butyl lactate 3.54
    diethyl carbonate 2.29
    propanediol butyl ether 2.74
    triethyl orthoformate 3.88
    p-tert-butyltoluene 0.87
    methyl 4-tert-butylbenzoate 5.91
    morpholine 7.61
    tert-butylamine 0.27
    n-dodecanol 0.38
    dimethoxymethane 6.45
    ethylene carbonate 3.46
    cyrene 7.17
    2-ethoxyethyl acetate 6.93
    2-ethylhexyl acetate 2.97
    1,2,4-trichlorobenzene 7.2
    4-methylpyridine 8.87
    dibutyl ether 1.42
    2,6-dimethyl-4-heptanol 0.78
    DEF 5.15
    dimethyl isosorbide 16.0
    tetrachloroethylene 7.44
    eugenol 6.17
    triacetin 5.2
    span 80 5.11
    1,4-butanediol 0.22
    1,1-dichloroethane 3.72
    2-methyl-1-pentanol 1.06
    methyl formate 1.75
    2-methyl-1-butanol 0.9
    n-decane 0.06
    butyronitrile 0.87
    3,7-dimethyl-1-octanol 0.88
    1-chlorooctane 0.42
    1-chlorotetradecane 0.19
    n-nonane 0.04
    undecane 0.04
    tert-butylcyclohexane 0.08
    cyclooctane 0.02
    cyclopentanol 1.12
    tetrahydropyran 4.28
    tert-amyl methyl ether 2.18
    2,5,8-trioxanonane 10.7
    1-hexene 0.33
    2-isopropoxyethanol 2.2
    2,2,2-trifluoroethanol 0.55
    methyl butyrate 3.96

    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