C.I. Acid Orange 52

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  • Identifiers

    CAS number
    547-58-0

    Molecular formula
    C14H14N3NaO3S

    SMILES
    CN(C)C1=CC=C(C=C1)N=NC2=CC=C(C=C2)S(=O)(=O)[O-].[Na+]

    Safety labels

  • Odor profile

    Fragrance
    Odorless 57.48%
    Roasted 30.04%
    Cooked 27.81%
    Savory 25.43%
    Meaty 24.97%
    Grape 22.22%
    Bitter 21.22%
    Burnt 19.68%
    Nutty 16.74%
    Popcorn 16.48%

     

    Flavor
    Bitter 75.49%
    Odorless 28.62%
    Nitrile 21.32%
    Taco 20.18%
    Roasted peanuts 20.12%
    Bread crust 19.89%
    Very strong 19.58%
    Indole 19.01%
    Scallion 18.92%
    Mild 18.69%

     

    Odor impact est.
    Low

  • Properties

    pKa est.
    4.41 (weak acid)

    Molecular weight
    327.34 g/mol

    Flash point

    • 227.79 ˚C est.

  • Synonyms

    • C.I. Acid Orange 52
    • DTXSID60883437
    • RefChem:917795
    • DTXCID201022968
    • METHYL ORANGE
    • 547-58-0
    • Orange III
    • MethylOrange
    • Helianthine B
    • Gold Orange
    • Acid Orange 52
    • Eniamethyl Orange
    • Helianthine
    • Tropaeolin D
    • C.I. 13025
    • Methyl Orange B
    • Kca Methyl Orange
    • Sodium p-dimethylaminoazobenzenesulfonate
    • MFCD00007502
    • 60305-61-5
    • Benzenesulfonic acid, 4-((4-(dimethylamino)phenyl)azo)-, sodium salt
    • Benzenesulfonic acid, 4-[[4-(dimethylamino)phenyl]azo]-, sodium salt
    • 6B4TC34456
    • Sodium 4'-(dimethylamino)azobenzene-4-sulfonate
    • 4-((4-(Dimethylamino)phenyl)diazenyl)benzenesulfonic acid, sodium salt
    • Benzenesulfonic acid, 4-[[4-(dimethylamino)phenyl]azo]-, sodium salt,(E)-
    • Methyl Orange solution
    • C14H14N3NaO3S
    • Methyloranz [Czech]
    • Oranz III [Czech]
    • CI Acid Orange 52
    • Orange III (VAN)
    • Helianthin
    • Methyloranz
    • Methyl orange, ACS reagent
    • sodium;4-[[4-(dimethylamino)phenyl]diazenyl]benzenesulfonate
    • Oranz methylova
    • sodium (E)-4-((4-(dimethylamino)phenyl)diazenyl)benzenesulfonate
    • Oranz methylova [Czech]
    • Oranz kysela 52 [Czech]
    • Oranz III
    • Oranz kysela 52
    • NSC-9416
    • HSDB 4322
    • 4-Dimethylaminoazobenzene-4'-sulphonic acid sodium salt
    • NSC 9416
    • EINECS 208-925-3
    • p-((p-(Dimethylamino)phenyl)azo)benzenesulfonic acid sodium salt
    • CI 13025
    • AI3-09086
    • CCRIS 9454
    • 4-{[4-(dimethylamino)phenyl]diazenyl}benzenesulfonic acid, sodium salt
    • UNII-6B4TC34456
    • Sodium 4-(dimethylamino)azobenzene-4'-sulfonate
    • 4-[4-(Dimethylamino)phenylazo]benzenesulfonic acid sodium salt
    • Sodium 4-(4-dimethylaminophenylazo)benzenesulphonate
    • Sodium 4-(4-(dimethylamino)phenylazo)benzenesulfonate
    • Methyl orange indicator
    • Methylorange sodium salt
    • AI 3-09086
    • METHYL ORANGE [MI]
    • SCHEMBL18892
    • SCHEMBL18893
    • METHYL ORANGE [HSDB]
    • Methyl Orange (C.I. 13025)
    • Benzenesulfonic acid, p-((p-(dimethylamino)phenyl)azo)-, sodium salt
    • MSK1169-100W
    • AKOS001115953
    • AKOS015902984
    • AKOS015950686
    • AKOS024301609
    • MSK1169-1000W
    • FM01511
    • PD167037
    • SY010301
    • DB-052645
    • HY-118907
    • CS-0077680
    • M0017
    • M0489
    • NS00080614
    • ST51016208
    • Acid orange 52 Solution in Water, 100ug/mL
    • EN300-18774
    • Acid orange 52 Solution in Water, 1000ug/mL
    • F492450
    • F986867
    • Q409196
    • 4-Dimethylaminoazobenzene-4'-sulfonic acid,sodium salt
    • sodium;4-[4-(dimethylamino)phenyl]azobenzenesulfonate
    • Z90123631
    • F0347-4903
    • Sodium 4-{[4-(dimethylamino)phenyl]diazenyl}benzene-1-sulfonate
    • 4-(((4-DIMETHYLAMINO)PHENYL)AZO)BENZENESULFONIC ACID SODIUM SALT
    • Sodium 4-[(E)-2-[4-(dimethylamino)phenyl]-diazen-1-yl]benzene-1-sulfonate
    • sodium 4-[(E)-2-[4-(dimethylamino)phenyl]diazen-1-yl]benzene-1-sulfonate
    • sodium 4-{2-[4-(dimethylamino)phenyl]diazen-1-yl}benzene-1-sulfonate
    • 4-(2-(4-(DIMETHYLAMINO)PHENYL)DIAZENYL)BENZENESULFONIC ACID SODIUM SALT (1:1)
    • Benzenesulfonic acid, 4-(2-(4-(dimethylamino)phenyl)diazenyl)-, sodium salt (1:1)
    • Benzenesulfonic acid, 4-[2-[4-(dimethylamino)phenyl]diazenyl]-, sodium salt
    • 547-58-0

  • Applications

    C.I. Acid Orange 52 (CAS 547-58-0) is a water-soluble azo dye used primarily for dyeing protein fibers such as wool and silk and for leather under acidic dyeing conditions; it is also employed as a colorant in industrial printing inks and coatings, and may be used for dyeing synthetic fibers such as nylon under acid conditions, while also serving as an intermediate in the synthesis of other azo dye products.

    gpt-5-nano

  • Solubility @25˚C

    Solvent Solubility (g/L)
    ethanol 3.05
    methanol 4.06
    isopropanol 2.01
    water 0.0
    ethyl acetate 8.38
    n-propanol 2.53
    acetone 28.15
    n-butanol 1.6
    acetonitrile 10.1
    DMF 100.24
    toluene 1.61
    isobutanol 1.12
    1,4-dioxane 14.52
    methyl acetate 16.16
    THF 41.46
    2-butanone 33.8
    n-pentanol 1.87
    sec-butanol 2.99
    n-hexane 0.02
    ethylene glycol 1.02
    NMP 53.25
    cyclohexane 0.06
    DMSO 66.9
    n-butyl acetate 5.21
    n-octanol 0.81
    chloroform 21.36
    n-propyl acetate 7.31
    acetic acid 13.35
    dichloromethane 29.17
    cyclohexanone 27.98
    propylene glycol 3.61
    isopropyl acetate 5.41
    DMAc 145.74
    2-ethoxyethanol 18.38
    isopentanol 1.47
    n-heptane 0.06
    ethyl formate 7.27
    1,2-dichloroethane 13.21
    n-hexanol 1.65
    2-methoxyethanol 31.07
    isobutyl acetate 2.94
    tetrachloromethane 0.41
    n-pentyl acetate 3.94
    transcutol 58.7
    n-heptanol 1.48
    ethylbenzene 0.71
    MIBK 5.53
    2-propoxyethanol 16.77
    tert-butanol 2.55
    MTBE 2.34
    2-butoxyethanol 8.54
    propionic acid 6.61
    o-xylene 1.14
    formic acid 7.21
    diethyl ether 2.39
    m-xylene 0.99
    p-xylene 1.35
    chlorobenzene 3.89
    dimethyl carbonate 8.51
    n-octane 0.04
    formamide 28.47
    cyclopentanone 51.38
    2-pentanone 11.78
    anisole 7.08
    cyclopentyl methyl ether 4.31
    gamma-butyrolactone 45.01
    1-methoxy-2-propanol 22.0
    pyridine 22.03
    3-pentanone 9.92
    furfural 43.61
    n-dodecane 0.05
    diethylene glycol 13.71
    diisopropyl ether 0.51
    tert-amyl alcohol 3.42
    acetylacetone 26.87
    n-hexadecane 0.05
    acetophenone 12.45
    methyl propionate 10.85
    isopentyl acetate 4.73
    trichloroethylene 48.17
    n-nonanol 1.11
    cyclohexanol 1.94
    benzyl alcohol 7.3
    2-ethylhexanol 1.35
    isooctanol 1.34
    dipropyl ether 2.12
    1,2-dichlorobenzene 4.43
    ethyl lactate 7.9
    propylene carbonate 15.63
    n-methylformamide 24.46
    2-pentanol 1.21
    n-pentane 0.02
    1-propoxy-2-propanol 11.88
    1-methoxy-2-propyl acetate 13.85
    2-(2-methoxypropoxy) propanol 15.13
    mesitylene 0.62
    ε-caprolactone 20.49
    p-cymene 1.06
    epichlorohydrin 55.78
    1,1,1-trichloroethane 4.3
    2-aminoethanol 3.06
    morpholine-4-carbaldehyde 69.95
    sulfolane 59.21
    2,2,4-trimethylpentane 0.04
    2-methyltetrahydrofuran 10.4
    n-hexyl acetate 3.61
    isooctane 0.02
    2-(2-butoxyethoxy)ethanol 16.31
    sec-butyl acetate 4.01
    tert-butyl acetate 6.57
    decalin 0.05
    glycerin 7.89
    diglyme 39.79
    acrylic acid 8.33
    isopropyl myristate 1.96
    n-butyric acid 6.57
    acetyl acetate 7.51
    di(2-ethylhexyl) phthalate 3.63
    ethyl propionate 5.75
    nitromethane 59.59
    1,2-diethoxyethane 10.13
    benzonitrile 8.59
    trioctyl phosphate 1.81
    1-bromopropane 2.16
    gamma-valerolactone 77.82
    n-decanol 0.93
    triethyl phosphate 4.2
    4-methyl-2-pentanol 0.83
    propionitrile 5.48
    vinylene carbonate 15.31
    1,1,2-trichlorotrifluoroethane 39.46
    DMS 8.35
    cumene 0.62
    2-octanol 0.85
    2-hexanone 10.25
    octyl acetate 2.57
    limonene 1.36
    1,2-dimethoxyethane 35.35
    ethyl orthosilicate 3.59
    tributyl phosphate 2.53
    diacetone alcohol 14.92
    N,N-dimethylaniline 5.11
    acrylonitrile 13.26
    aniline 5.14
    1,3-propanediol 4.31
    bromobenzene 3.2
    dibromomethane 9.47
    1,1,2,2-tetrachloroethane 25.94
    2-methyl-cyclohexyl acetate 5.93
    tetrabutyl urea 4.8
    diisobutyl methanol 1.03
    2-phenylethanol 7.28
    styrene 1.18
    dioctyl adipate 5.19
    dimethyl sulfate 21.13
    ethyl butyrate 5.9
    methyl lactate 12.97
    butyl lactate 6.07
    diethyl carbonate 4.63
    propanediol butyl ether 7.35
    triethyl orthoformate 4.98
    p-tert-butyltoluene 1.0
    methyl 4-tert-butylbenzoate 10.46
    morpholine 22.89
    tert-butylamine 0.84
    n-dodecanol 0.73
    dimethoxymethane 31.76
    ethylene carbonate 9.26
    cyrene 20.81
    2-ethoxyethyl acetate 10.89
    2-ethylhexyl acetate 3.45
    1,2,4-trichlorobenzene 7.96
    4-methylpyridine 14.34
    dibutyl ether 1.57
    2,6-dimethyl-4-heptanol 1.03
    DEF 19.76
    dimethyl isosorbide 27.63
    tetrachloroethylene 9.45
    eugenol 11.96
    triacetin 12.05
    span 80 8.88
    1,4-butanediol 2.09
    1,1-dichloroethane 6.86
    2-methyl-1-pentanol 1.93
    methyl formate 18.16
    2-methyl-1-butanol 1.58
    n-decane 0.07
    butyronitrile 3.86
    3,7-dimethyl-1-octanol 1.34
    1-chlorooctane 0.47
    1-chlorotetradecane 0.24
    n-nonane 0.05
    undecane 0.06
    tert-butylcyclohexane 0.05
    cyclooctane 0.02
    cyclopentanol 3.21
    tetrahydropyran 6.23
    tert-amyl methyl ether 2.48
    2,5,8-trioxanonane 28.64
    1-hexene 0.19
    2-isopropoxyethanol 10.05
    2,2,2-trifluoroethanol 6.42
    methyl butyrate 9.47

    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