Calcium 4-[(5-chloro-4-methyl-2-sulphonatophenyl)azo]-3-hydroxy-2-naphthoate

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  • Identifiers

    CAS number
    7023-61-2

    Molecular formula
    C18H11CaClN2O6S

    SMILES
    CC1=CC(=C(C=C1Cl)N=NC2=C(C(=CC3=CC=CC=C32)C(=O)O)[O-])S(=O)(=O)[O-].[Ca+2]

    Safety labels

  • Odor profile

    Fragrance
    Odorless 74.75%
    Grape 23.97%
    Bitter 21.98%
    Cooked 20.05%
    Savory 18.41%
    Fruity 17.85%
    Milky 17.07%
    Fatty 16.44%
    Clean 14.97%
    Burnt 14.9%

     

    Flavor
    Bitter 88.81%
    Odorless 41.68%
    Bland 22.44%
    Nitrile 20.84%
    Mild 20.45%
    Very strong 19.08%
    Sweet-like 18.9%
    Bread crust 18.79%
    Indole 18.75%
    Taco 18.74%

     

    Odor impact est.
    Low

  • Properties

    pKa est.
    2.13 (strong acid)

    Molecular weight
    458.9 g/mol

    Flash point

    • 251.86 ˚C est.

  • Synonyms

    • Calcium 4-((5-chloro-4-methyl-2-sulphonatophenyl)azo)-3-hydroxy-2-naphthoate
    • Calcium 4-[(5-chloro-4-methyl-2-sulphonatophenyl)azo]-3-hydroxy-2-naphthoate
    • RefChem:573361
    • 7023-61-2
    • 3S62RPH1XY
    • calcium;2-[(3-carboxy-2-oxidonaphthalen-1-yl)diazenyl]-4-chloro-5-methylbenzenesulfonate
    • 2-Naphthalenecarboxylic acid, 4-((5-chloro-4-methyl-2-sulfophenyl)azo)-3-hydroxy-, calcium salt (1:1)
    • 2-Naphthalenecarboxylic acid, 4-(2-(5-chloro-4-methyl-2-sulfophenyl)diazenyl)-3-hydroxy-, calcium salt (1:1)
    • MFCD00071945
    • EINECS 230-303-5
    • UNII-3S62RPH1XY
    • starbld0009641
    • CALCIUM RED 2B
    • EC 230-303-5
    • SCHEMBL375654
    • DTXSID0027642
    • SCHEMBL16323679
    • SCHEMBL23064839
    • SCHEMBL23064840
    • SCHEMBL29687131
    • SCHEMBL31299782
    • HY-D0460
    • CALCIUM 2B RUBINE X 2430
    • 4-((5-Chloro-2-sulfo-p-tolyl)azo)-3-hydroxy-2-naphthalenecarboxylic acid, calcium salt (1:1)
    • CS-0010537
    • NS00074382
    • Q27257966
    • 2-NAPHTHOIC ACID, 4-(5-CHLORO-2-SULFO-P-TOLYLAZO)-3-HYDROXY-, CALCIUM SALT
    • 230-303-5
    • Calcium 4-[(5-chloro-4-methyl-2-sulfonatophenyl)diazenyl]-3-hydroxynaphthalene-2-carboxylate
    • 7023-61-2

  • Applications

    Calcium 4-[(5-chloro-4-methyl-2-sulphonatophenyl)azo]-3-hydroxy-2-naphthoate (CAS 7023-61-2) is a water-soluble azo colorant used as a dye and color additive in a range of industrial formulations. It is commonly evaluated for textile dyeing and printing inks, and may be employed as a colorant in coatings and paints, as well as in plastics and polymer compounds to impart distinctive hues. Owing to its sulfonated structure, it is often considered for detergent and household product colorants in aqueous formulations. Additionally, this compound can function as an intermediate or precursor in the synthesis of related azo dyes for specialty applications, subject to local regulations and formulation limits.

    gpt-5-nano

  • Solubility @25˚C

    Solvent Solubility (g/L)
    ethanol 3.95
    methanol 3.71
    isopropanol 2.78
    water 0.0
    ethyl acetate 6.49
    n-propanol 4.06
    acetone 28.3
    n-butanol 2.46
    acetonitrile 5.05
    DMF 64.87
    toluene 2.22
    isobutanol 2.09
    1,4-dioxane 24.45
    methyl acetate 12.94
    THF 115.41
    2-butanone 28.34
    n-pentanol 1.97
    sec-butanol 3.43
    n-hexane 0.02
    ethylene glycol 2.08
    NMP 44.26
    cyclohexane 0.07
    DMSO 36.65
    n-butyl acetate 4.53
    n-octanol 1.1
    chloroform 5.99
    n-propyl acetate 5.49
    acetic acid 8.37
    dichloromethane 6.86
    cyclohexanone 21.88
    propylene glycol 3.6
    isopropyl acetate 4.41
    DMAc 75.57
    2-ethoxyethanol 13.16
    isopentanol 1.81
    n-heptane 0.05
    ethyl formate 4.36
    1,2-dichloroethane 5.86
    n-hexanol 1.33
    2-methoxyethanol 31.93
    isobutyl acetate 2.36
    tetrachloromethane 0.2
    n-pentyl acetate 4.29
    transcutol 26.62
    n-heptanol 1.31
    ethylbenzene 0.69
    MIBK 4.38
    2-propoxyethanol 15.92
    tert-butanol 3.11
    MTBE 3.1
    2-butoxyethanol 8.8
    propionic acid 5.18
    o-xylene 0.96
    formic acid 4.49
    diethyl ether 3.17
    m-xylene 0.86
    p-xylene 1.1
    chlorobenzene 1.92
    dimethyl carbonate 7.69
    n-octane 0.04
    formamide 10.97
    cyclopentanone 55.64
    2-pentanone 10.46
    anisole 4.93
    cyclopentyl methyl ether 7.56
    gamma-butyrolactone 39.16
    1-methoxy-2-propanol 20.32
    pyridine 24.8
    3-pentanone 8.3
    furfural 25.05
    n-dodecane 0.06
    diethylene glycol 11.82
    diisopropyl ether 0.53
    tert-amyl alcohol 3.19
    acetylacetone 19.64
    n-hexadecane 0.07
    acetophenone 6.64
    methyl propionate 9.66
    isopentyl acetate 3.64
    trichloroethylene 16.37
    n-nonanol 1.37
    cyclohexanol 2.47
    benzyl alcohol 4.64
    2-ethylhexanol 0.83
    isooctanol 1.0
    dipropyl ether 2.29
    1,2-dichlorobenzene 1.52
    ethyl lactate 4.19
    propylene carbonate 8.76
    n-methylformamide 16.69
    2-pentanol 1.4
    n-pentane 0.03
    1-propoxy-2-propanol 9.82
    1-methoxy-2-propyl acetate 11.07
    2-(2-methoxypropoxy) propanol 10.29
    mesitylene 0.39
    ε-caprolactone 16.09
    p-cymene 0.59
    epichlorohydrin 54.06
    1,1,1-trichloroethane 2.38
    2-aminoethanol 4.1
    morpholine-4-carbaldehyde 47.3
    sulfolane 47.31
    2,2,4-trimethylpentane 0.03
    2-methyltetrahydrofuran 17.91
    n-hexyl acetate 3.85
    isooctane 0.02
    2-(2-butoxyethoxy)ethanol 13.76
    sec-butyl acetate 3.08
    tert-butyl acetate 5.52
    decalin 0.04
    glycerin 7.9
    diglyme 24.54
    acrylic acid 6.33
    isopropyl myristate 2.24
    n-butyric acid 4.63
    acetyl acetate 4.15
    di(2-ethylhexyl) phthalate 2.57
    ethyl propionate 4.63
    nitromethane 29.89
    1,2-diethoxyethane 8.46
    benzonitrile 4.41
    trioctyl phosphate 1.81
    1-bromopropane 1.73
    gamma-valerolactone 64.93
    n-decanol 1.11
    triethyl phosphate 1.82
    4-methyl-2-pentanol 0.73
    propionitrile 5.07
    vinylene carbonate 7.69
    1,1,2-trichlorotrifluoroethane 22.86
    DMS 5.99
    cumene 0.37
    2-octanol 0.92
    2-hexanone 8.24
    octyl acetate 2.93
    limonene 0.77
    1,2-dimethoxyethane 24.27
    ethyl orthosilicate 1.64
    tributyl phosphate 2.1
    diacetone alcohol 11.25
    N,N-dimethylaniline 2.43
    acrylonitrile 9.92
    aniline 4.27
    1,3-propanediol 6.35
    bromobenzene 1.59
    dibromomethane 2.79
    1,1,2,2-tetrachloroethane 10.83
    2-methyl-cyclohexyl acetate 3.29
    tetrabutyl urea 5.29
    diisobutyl methanol 0.65
    2-phenylethanol 4.38
    styrene 1.06
    dioctyl adipate 3.96
    dimethyl sulfate 11.21
    ethyl butyrate 4.02
    methyl lactate 9.14
    butyl lactate 4.83
    diethyl carbonate 2.39
    propanediol butyl ether 6.61
    triethyl orthoformate 3.22
    p-tert-butyltoluene 0.6
    methyl 4-tert-butylbenzoate 6.85
    morpholine 30.72
    tert-butylamine 0.87
    n-dodecanol 0.85
    dimethoxymethane 31.35
    ethylene carbonate 5.44
    cyrene 12.64
    2-ethoxyethyl acetate 10.22
    2-ethylhexyl acetate 2.64
    1,2,4-trichlorobenzene 3.14
    4-methylpyridine 12.88
    dibutyl ether 1.84
    2,6-dimethyl-4-heptanol 0.65
    DEF 12.59
    dimethyl isosorbide 22.13
    tetrachloroethylene 4.13
    eugenol 8.32
    triacetin 6.28
    span 80 6.88
    1,4-butanediol 1.93
    1,1-dichloroethane 3.33
    2-methyl-1-pentanol 1.47
    methyl formate 14.16
    2-methyl-1-butanol 2.05
    n-decane 0.08
    butyronitrile 3.31
    3,7-dimethyl-1-octanol 1.02
    1-chlorooctane 0.48
    1-chlorotetradecane 0.28
    n-nonane 0.06
    undecane 0.07
    tert-butylcyclohexane 0.03
    cyclooctane 0.02
    cyclopentanol 5.39
    tetrahydropyran 11.49
    tert-amyl methyl ether 2.76
    2,5,8-trioxanonane 20.54
    1-hexene 0.26
    2-isopropoxyethanol 7.18
    2,2,2-trifluoroethanol 2.39
    methyl butyrate 6.13

    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