C.I. Pigment Blue 63

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  • Identifiers

    CAS number
    16521-38-3

    Molecular formula
    C16H10AlN2O8S2+3

    SMILES
    C1=CC2=C(C=C1S(=O)(=O)O)C(=C(N2)C3=NC4=C(C3=O)C=C(C=C4)S(=O)(=O)O)O.[Al+3]

    Safety labels

  • Odor profile

    Fragrance
    Odorless 87.3%
    Cooked 20.25%
    Burnt 18.33%
    Savory 17.12%
    Bitter 16.4%
    Roasted 15.27%
    Clean 12.77%
    Sulfurous 11.22%
    Milky 10.89%
    Meaty 10.82%

     

    Flavor
    Bitter 94.35%
    Odorless 32.45%
    Bland 21.89%
    Nitrile 18.94%
    Very strong 17.42%
    Bread crust 17.25%
    Taco 17.2%
    Sweet-like 17.16%
    Indole 17.13%
    Cedarleaf 16.98%

     

    Odor impact est.
    Low

  • Properties

    pKa est.
    5.5 (weak acid)

    Molecular weight
    449.4 g/mol

    Vapor pressure est.

    • hPa @ 20°C
    • hPa @ 25°C

    Evaporation rate
    Ultra slow

    Boiling point est.
    1110°C

    Flash point

    • 381.56 ˚C est.

  • Synonyms

    • 16521-38-3
    • RefChem:572495
    • DTXSID6044224
    • C.I. Food Blue 1-aluminum lake
    • 1342-11-6
    • Certolake indigo carmine
    • Indigotine-aluminum lake
    • aluminum;2-(3-hydroxy-5-sulfo-1H-indol-2-yl)-3-oxoindole-5-sulfonic acid
    • C.I. Food Blue 1:1
    • (Z)-3,3'-dioxo-[2,2'-biindolinylidene]-5,5'-disulfonic acid, aluminum(III) salt
    • Indigo carmine-aluminum lake
    • Japan Blue 2 Aluminum lake
    • Acid Blue 74-aluminum lake
    • Japan Food Blue No. 2 aluminum lake
    • C.I. 73015 Aluminum lake
    • C.I. 73015-Aluminum lake
    • Food Blue No. 2-aluminum lake
    • C.I. Acid Blue 74-aluminum lake
    • EINECS 240-589-3
    • Indigo disulfonic acid, aluminum salt
    • FD&C Blue No. 2-aluminum lake
    • Aluminum 3,3'-dioxo-(delta2,2-biindoline)-5,5'disulfonate
    • BLUE 2 LAKE
    • (delta2,2-Biindoline)-5,5'-disulfonic acid, 3,3'-dioxo-, aluminum salt
    • SCHEMBL29354209
    • CHEBI:172686
    • INHYHTBURMMHBG-UHFFFAOYSA-N
    • AKOS040750972
    • aluminum;2-(3-hydroxy-5-sulo-1H-indol-2-yl)-3-oxoindole-5-sulonic acid
    • aluminum;(2E)-3-oxo-2-(3-oxo-5-sulfo-1H-indol-2-ylidene)-1H-indole-5-sulfonic acid
    • 16521-38-3

  • Applications

    C.I. Pigment Blue 63 (CAS 16521-38-3) is a copper phthalocyanine blue pigment widely used as a colorant in coatings (architectural, industrial, and automotive), in printing inks (gravure and offset), and in plastics such as PVC and other polymers; it is also employed as a pigment in ceramic glazes, delivering a deep, weather-stable blue color.

    gpt-5-nano

  • Solubility @25˚C

    Solvent Solubility (g/L)
    ethanol 0.63
    methanol 1.26
    isopropanol 0.48
    water 0.17
    ethyl acetate 0.22
    n-propanol 0.67
    acetone 0.57
    n-butanol 0.35
    acetonitrile 0.33
    DMF 54.01
    toluene 0.03
    isobutanol 0.24
    1,4-dioxane 1.82
    methyl acetate 0.54
    THF 3.53
    2-butanone 0.97
    n-pentanol 0.19
    sec-butanol 0.51
    n-hexane 0.0
    ethylene glycol 5.31
    NMP 20.45
    cyclohexane 0.01
    DMSO 9.7
    n-butyl acetate 0.35
    n-octanol 0.51
    chloroform 0.02
    n-propyl acetate 0.29
    acetic acid 1.09
    dichloromethane 0.02
    cyclohexanone 0.95
    propylene glycol 5.57
    isopropyl acetate 0.19
    DMAc 29.21
    2-ethoxyethanol 5.74
    isopentanol 0.16
    n-heptane 0.01
    ethyl formate 0.41
    1,2-dichloroethane 0.03
    n-hexanol 0.17
    2-methoxyethanol 21.83
    isobutyl acetate 0.08
    tetrachloromethane 0.0
    n-pentyl acetate 0.65
    transcutol 11.93
    n-heptanol 0.51
    ethylbenzene 0.02
    MIBK 0.18
    2-propoxyethanol 6.07
    tert-butanol 0.21
    MTBE 0.08
    2-butoxyethanol 5.67
    propionic acid 1.12
    o-xylene 0.03
    formic acid 5.22
    diethyl ether 0.19
    m-xylene 0.02
    p-xylene 0.02
    chlorobenzene 0.01
    dimethyl carbonate 1.07
    n-octane 0.01
    formamide 12.71
    cyclopentanone 2.79
    2-pentanone 0.46
    anisole 0.16
    cyclopentyl methyl ether 0.37
    gamma-butyrolactone 3.58
    1-methoxy-2-propanol 13.92
    pyridine 1.22
    3-pentanone 0.4
    furfural 4.12
    n-dodecane 0.01
    diethylene glycol 11.04
    diisopropyl ether 0.03
    tert-amyl alcohol 0.24
    acetylacetone 0.77
    n-hexadecane 0.01
    acetophenone 0.3
    methyl propionate 0.8
    isopentyl acetate 0.21
    trichloroethylene 0.06
    n-nonanol 0.55
    cyclohexanol 0.26
    benzyl alcohol 0.27
    2-ethylhexanol 0.09
    isooctanol 0.25
    dipropyl ether 0.31
    1,2-dichlorobenzene 0.01
    ethyl lactate 1.34
    propylene carbonate 0.69
    n-methylformamide 10.22
    2-pentanol 0.2
    n-pentane 0.01
    1-propoxy-2-propanol 4.47
    1-methoxy-2-propyl acetate 1.21
    2-(2-methoxypropoxy) propanol 4.12
    mesitylene 0.01
    ε-caprolactone 1.17
    p-cymene 0.02
    epichlorohydrin 1.09
    1,1,1-trichloroethane 0.01
    2-aminoethanol 4.66
    morpholine-4-carbaldehyde 25.79
    sulfolane 5.92
    2,2,4-trimethylpentane 0.0
    2-methyltetrahydrofuran 0.49
    n-hexyl acetate 0.64
    isooctane 0.0
    2-(2-butoxyethoxy)ethanol 7.19
    sec-butyl acetate 0.13
    tert-butyl acetate 0.17
    decalin 0.0
    glycerin 27.27
    diglyme 11.69
    acrylic acid 2.16
    isopropyl myristate 0.22
    n-butyric acid 0.57
    acetyl acetate 0.11
    di(2-ethylhexyl) phthalate 0.37
    ethyl propionate 0.29
    nitromethane 3.81
    1,2-diethoxyethane 1.1
    benzonitrile 0.19
    trioctyl phosphate 0.3
    1-bromopropane 0.02
    gamma-valerolactone 13.79
    n-decanol 0.36
    triethyl phosphate 0.2
    4-methyl-2-pentanol 0.07
    propionitrile 0.37
    vinylene carbonate 0.7
    1,1,2-trichlorotrifluoroethane 3.45
    DMS 0.57
    cumene 0.01
    2-octanol 0.35
    2-hexanone 0.32
    octyl acetate 0.42
    limonene 0.03
    1,2-dimethoxyethane 5.82
    ethyl orthosilicate 0.17
    tributyl phosphate 0.27
    diacetone alcohol 1.21
    N,N-dimethylaniline 0.17
    acrylonitrile 0.98
    aniline 0.17
    1,3-propanediol 4.08
    bromobenzene 0.01
    dibromomethane 0.01
    1,1,2,2-tetrachloroethane 0.07
    2-methyl-cyclohexyl acetate 0.19
    tetrabutyl urea 1.02
    diisobutyl methanol 0.06
    2-phenylethanol 0.29
    styrene 0.02
    dioctyl adipate 0.45
    dimethyl sulfate 1.89
    ethyl butyrate 0.31
    methyl lactate 4.88
    butyl lactate 2.33
    diethyl carbonate 0.2
    propanediol butyl ether 8.56
    triethyl orthoformate 0.46
    p-tert-butyltoluene 0.02
    methyl 4-tert-butylbenzoate 0.95
    morpholine 4.19
    tert-butylamine 0.05
    n-dodecanol 0.23
    dimethoxymethane 8.16
    ethylene carbonate 0.47
    cyrene 4.37
    2-ethoxyethyl acetate 1.49
    2-ethylhexyl acetate 0.16
    1,2,4-trichlorobenzene 0.03
    4-methylpyridine 0.41
    dibutyl ether 0.27
    2,6-dimethyl-4-heptanol 0.06
    DEF 2.29
    dimethyl isosorbide 4.16
    tetrachloroethylene 0.04
    eugenol 2.22
    triacetin 1.37
    span 80 3.21
    1,4-butanediol 1.38
    1,1-dichloroethane 0.01
    2-methyl-1-pentanol 0.09
    methyl formate 4.0
    2-methyl-1-butanol 0.2
    n-decane 0.02
    butyronitrile 0.21
    3,7-dimethyl-1-octanol 0.15
    1-chlorooctane 0.05
    1-chlorotetradecane 0.02
    n-nonane 0.02
    undecane 0.01
    tert-butylcyclohexane 0.0
    cyclooctane 0.0
    cyclopentanol 0.67
    tetrahydropyran 0.5
    tert-amyl methyl ether 0.12
    2,5,8-trioxanonane 7.8
    1-hexene 0.02
    2-isopropoxyethanol 1.84
    2,2,2-trifluoroethanol 0.83
    methyl butyrate 0.46

    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