C.I. Natural Red 4:1

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  • Identifiers

    CAS number
    1328-60-5

    Molecular formula
    C22H17AlO13

    SMILES
    CC1=C2C(=CC(=C1C(=O)O)O)C(=O)C3=C(C2=O)C(=C(C(=C3[O-])[O-])[C@H]4[C@@H]([C@H]([C@@H]([C@H](O4)CO)O)O)O)[O-].[Al+3]

    Safety labels

  • Odor profile

    Fragrance
    Odorless 79.01%
    Phenolic 22.76%
    Sweet 22.27%
    Vanilla 20.28%
    Milky 19.84%
    Bitter 19.36%
    Burnt 18.16%
    Balsamic 17.67%
    Dry 17.34%
    Clean 16.69%

     

    Flavor
    Bitter 86.72%
    Odorless 42.01%
    Bland 29.31%
    Sweet-like 23.44%
    Very mild 20.26%
    Cedarleaf 19.96%
    Nitrile 19.46%
    Mild 19.07%
    Parsley 18.83%
    Lovage 18.67%

     

    Odor impact est.
    Low

  • Properties

    pKa est.
    1.25 (strong acid)

    Molecular weight
    516.3 g/mol

    Flash point

    • 341.4 ˚C est.

  • Synonyms

    • C.I. Natural Red 4:1
    • 1328-60-5
    • RefChem:572474
    • DTXSID3093654
    • EINECS 215-527-3
    • Aluminum Carmine
    • MFCD00167027
    • aluminum;6-carboxy-7-hydroxy-5-methyl-9,10-dioxo-3-[(2S,3R,4R,5S,6R)-3,4,5-trihydroxy-6-(hydroxymethyl)oxan-2-yl]anthracene-1,2,4-triolate
    • C22H17AlO13
    • SHJRELLQRVIXBR-FJASXRKZSA-K
    • aluminum;6-carboxy-7-hydroxy-5-methyl-9,10-dioxo-3-[(2S,3R,4R,5S,6R)-3,4,5-trihydroxy-6-(hydroxymethyl)tetrahydropyran-2-yl]anthracene-1,2,4-triolate
    • 1328-60-5

  • Applications

    C.I. Natural Red 4:1 (CAS 1328-60-5) is a natural colorant used primarily in cosmetics and personal care products; it may be employed as a colorant for textiles; it is used in coatings and inks; it can be used in plastics and polymer formulations; and it may be considered for use in food processing where permitted by regulations.

    gpt-5-nano

  • Solubility @25˚C

    Solvent Solubility (g/L)
    ethanol 18.43
    methanol 28.13
    isopropanol 6.71
    water 0.4
    ethyl acetate 2.64
    n-propanol 10.07
    acetone 10.48
    n-butanol 3.18
    acetonitrile 3.11
    DMF 104.84
    toluene 0.32
    isobutanol 2.38
    1,4-dioxane 11.9
    methyl acetate 5.39
    THF 26.07
    2-butanone 7.29
    n-pentanol 1.44
    sec-butanol 3.25
    n-hexane 0.04
    ethylene glycol 45.15
    NMP 77.75
    cyclohexane 0.11
    DMSO 161.81
    n-butyl acetate 0.81
    n-octanol 0.67
    chloroform 0.49
    n-propyl acetate 1.29
    acetic acid 40.44
    dichloromethane 0.82
    cyclohexanone 5.42
    propylene glycol 33.15
    isopropyl acetate 0.9
    DMAc 73.05
    2-ethoxyethanol 27.36
    isopentanol 1.05
    n-heptane 0.06
    ethyl formate 3.68
    1,2-dichloroethane 1.2
    n-hexanol 0.76
    2-methoxyethanol 85.53
    isobutyl acetate 0.25
    tetrachloromethane 0.13
    n-pentyl acetate 0.83
    transcutol 14.5
    n-heptanol 0.88
    ethylbenzene 0.12
    MIBK 0.7
    2-propoxyethanol 15.49
    tert-butanol 2.71
    MTBE 0.61
    2-butoxyethanol 6.49
    propionic acid 11.05
    o-xylene 0.22
    formic acid 80.06
    diethyl ether 2.31
    m-xylene 0.16
    p-xylene 0.12
    chlorobenzene 0.11
    dimethyl carbonate 7.14
    n-octane 0.04
    formamide 95.74
    cyclopentanone 14.83
    2-pentanone 2.96
    anisole 0.56
    cyclopentyl methyl ether 2.8
    gamma-butyrolactone 22.13
    1-methoxy-2-propanol 41.11
    pyridine 6.19
    3-pentanone 2.4
    furfural 11.03
    n-dodecane 0.02
    diethylene glycol 31.97
    diisopropyl ether 0.16
    tert-amyl alcohol 1.69
    acetylacetone 4.28
    n-hexadecane 0.03
    acetophenone 0.88
    methyl propionate 6.41
    isopentyl acetate 0.38
    trichloroethylene 1.37
    n-nonanol 0.71
    cyclohexanol 1.58
    benzyl alcohol 1.22
    2-ethylhexanol 0.28
    isooctanol 0.45
    dipropyl ether 1.17
    1,2-dichlorobenzene 0.1
    ethyl lactate 3.42
    propylene carbonate 3.23
    n-methylformamide 52.0
    2-pentanol 1.16
    n-pentane 0.08
    1-propoxy-2-propanol 6.83
    1-methoxy-2-propyl acetate 2.68
    2-(2-methoxypropoxy) propanol 4.4
    mesitylene 0.08
    ε-caprolactone 5.19
    p-cymene 0.08
    epichlorohydrin 13.16
    1,1,1-trichloroethane 0.18
    2-aminoethanol 41.29
    morpholine-4-carbaldehyde 55.27
    sulfolane 45.47
    2,2,4-trimethylpentane 0.01
    2-methyltetrahydrofuran 4.78
    n-hexyl acetate 0.78
    isooctane 0.01
    2-(2-butoxyethoxy)ethanol 7.49
    sec-butyl acetate 0.38
    tert-butyl acetate 0.68
    decalin 0.02
    glycerin 80.44
    diglyme 12.93
    acrylic acid 16.44
    isopropyl myristate 0.27
    n-butyric acid 4.39
    acetyl acetate 1.11
    di(2-ethylhexyl) phthalate 0.41
    ethyl propionate 1.42
    nitromethane 50.73
    1,2-diethoxyethane 1.83
    benzonitrile 0.44
    trioctyl phosphate 0.46
    1-bromopropane 0.51
    gamma-valerolactone 35.69
    n-decanol 0.5
    triethyl phosphate 0.61
    4-methyl-2-pentanol 0.32
    propionitrile 2.43
    vinylene carbonate 3.38
    1,1,2-trichlorotrifluoroethane 23.24
    DMS 1.57
    cumene 0.06
    2-octanol 0.44
    2-hexanone 1.24
    octyl acetate 0.55
    limonene 0.14
    1,2-dimethoxyethane 18.08
    ethyl orthosilicate 0.48
    tributyl phosphate 0.41
    diacetone alcohol 4.69
    N,N-dimethylaniline 0.53
    acrylonitrile 4.99
    aniline 1.21
    1,3-propanediol 27.45
    bromobenzene 0.07
    dibromomethane 0.43
    1,1,2,2-tetrachloroethane 1.34
    2-methyl-cyclohexyl acetate 0.44
    tetrabutyl urea 1.03
    diisobutyl methanol 0.16
    2-phenylethanol 0.78
    styrene 0.13
    dioctyl adipate 0.65
    dimethyl sulfate 16.1
    ethyl butyrate 0.87
    methyl lactate 17.77
    butyl lactate 2.13
    diethyl carbonate 0.6
    propanediol butyl ether 6.86
    triethyl orthoformate 0.86
    p-tert-butyltoluene 0.08
    methyl 4-tert-butylbenzoate 1.3
    morpholine 25.62
    tert-butylamine 0.61
    n-dodecanol 0.33
    dimethoxymethane 36.41
    ethylene carbonate 2.61
    cyrene 8.54
    2-ethoxyethyl acetate 2.15
    2-ethylhexyl acetate 0.29
    1,2,4-trichlorobenzene 0.2
    4-methylpyridine 2.03
    dibutyl ether 0.43
    2,6-dimethyl-4-heptanol 0.16
    DEF 7.57
    dimethyl isosorbide 6.04
    tetrachloroethylene 1.22
    eugenol 2.17
    triacetin 1.83
    span 80 3.92
    1,4-butanediol 7.62
    1,1-dichloroethane 0.37
    2-methyl-1-pentanol 0.52
    methyl formate 29.32
    2-methyl-1-butanol 1.25
    n-decane 0.05
    butyronitrile 1.06
    3,7-dimethyl-1-octanol 0.25
    1-chlorooctane 0.14
    1-chlorotetradecane 0.06
    n-nonane 0.05
    undecane 0.03
    tert-butylcyclohexane 0.01
    cyclooctane 0.04
    cyclopentanol 4.71
    tetrahydropyran 4.31
    tert-amyl methyl ether 0.7
    2,5,8-trioxanonane 9.12
    1-hexene 0.17
    2-isopropoxyethanol 6.95
    2,2,2-trifluoroethanol 15.72
    methyl butyrate 1.89

    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