Tartrazine

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  • Identifiers

    CAS number
    1934-21-0

    Molecular formula
    C16H9N4Na3O9S2

    SMILES
    C1=CC(=CC=C1N=NC2C(=NN(C2=O)C3=CC=C(C=C3)S(=O)(=O)[O-])C(=O)[O-])S(=O)(=O)[O-].[Na+].[Na+].[Na+]

    Safety labels

  • Odor profile

    Fragrance
    Odorless 85.26%
    Cooked 22.48%
    Savory 19.74%
    Roasted 18.64%
    Burnt 17.92%
    Bitter 17.38%
    Popcorn 13.81%
    Nutty 13.68%
    Pungent 13.03%
    Meaty 11.97%

     

    Flavor
    Bitter 86.91%
    Odorless 35.01%
    Bland 20.22%
    Nitrile 19.59%
    Taco 18.48%
    Bread crust 18.27%
    Roasted peanuts 17.84%
    Very strong 17.6%
    Indole 17.38%
    Very mild 17.25%

     

    Odor impact est.
    Odorless

  • Properties

    pKa est.
    -0.09 (strong acid)

    Molecular weight
    534.4 g/mol

    Flash point

    • 308.54 ˚C est.

  • Synonyms

    • Tartrazine
    • 1934-21-0
    • Acid yellow 23
    • Yellow 5
    • Aizen tartrazine
    • Food Yellow 4
    • Tartraphenine
    • Tartran Yellow
    • Amacid Yellow T
    • Cilefa Yellow T
    • FD & C Yellow no. 5
    • 1342-47-8
    • trisodium salt
    • FD&C Yellow No. 5
    • A.F. Yellow No. 4
    • C.I. 19140
    • Tartrazine FD&C Yellow #5
    • Atul Tartrazine
    • Erio Tartrazine
    • Kako Tartrazine
    • Tartrazine Lake
    • Tartrazine B
    • Tartrazine C
    • Tartrazine G
    • Tartrazine M
    • Tartrazine N
    • Tartrazine O
    • Tartrazine T
    • CI 19140
    • HD Tartrazine
    • Hydrazine Yellow
    • Lake Yellow
    • Sugai Tartrazine
    • Tartrazine FQ
    • Tartrazine NS
    • Tartrazine XX
    • Tartrazol Yellow
    • Tartrazine XXX
    • Tartrazine MCGL
    • Tartrazol BPC
    • Dye Yellow Lake
    • Fenazo Yellow T
    • Kayaku Tartrazine
    • Mitsui Tartrazine
    • Oxanal Yellow T
    • Tartar Yellow N
    • Tartar Yellow S
    • Tartrazine Yellow
    • Kiton Yellow T
    • Lemon Yellow A
    • Acid Yellow T
    • Bucacid tartrazine
    • Dolkwal tartrazine
    • Hexacol Tartrazine
    • Hidazid Tartrazine
    • Acilan Yellow GG
    • Egg Yellow A
    • San-ei Tartrazine
    • Tartar Yellow FS
    • Tartar Yellow PF
    • Airedale Yellow T
    • Canacert tartrazine
    • Food Yellow 5
    • Neklacid Yellow T
    • Tartrine Yellow O
    • Eurocert Tartrazine
    • Vondacid Tartrazine
    • Hydroxine Yellow L
    • Tartrazine C Extra
    • Calcocid Yellow XX
    • KCA Tartrazine PF
    • Yellow Lake 69
    • MFCD00148908
    • Naphtocard Yellow O
    • Tartrazine A Export
    • HD Tartrazine Supra
    • Calcocid Yellow MCG
    • Tartrazine Yellow 5
    • Yellow No. 5
    • Tartrazine A expo T
    • Tartrazine B.P.C.
    • D&C Yellow 5
    • Food Yellow No. 4
    • Lemon Yellow A Geigy
    • Schultz No. 737
    • Maple Tartrazol Yellow
    • Acid Leather Yellow T
    • C.I. 640
    • Unitertracid Yellow TE
    • Yellow No. 5 FDC
    • Curon Fast Yellow 5G
    • FD And C Yellow 5
    • 1310 Yellow
    • 1409 Yellow
    • Xylene Fast Yellow GT
    • Hispacid Fast Yellow T
    • Usacert Yellow No. 5
    • C.I. Food Yellow 4
    • Hexacert Yellow No. 5
    • trisodium 5-oxo-1-(4-sulfonatophenyl)-4-(4-sulfonatophenyl)diazenyl-4H-pyrazole-3-carboxylate
    • CHEBI:9405
    • FD&G Yellow No. 5
    • Tartrazine Extra Pure A
    • L Yellow Z 1020
    • Tartrazine Lake Yellow N
    • Edicol Supra Tartrazine N
    • D and C Yellow No. 5
    • KCA Foodcol Tartrazine PF
    • Certicol Tartrazol Yellow S
    • Tartrazine O Specially Pure
    • Tartrazine XX Specially Pure
    • trisodium;5-oxo-1-(4-sulfonatophenyl)-4-[(4-sulfonatophenyl)diazenyl]-4H-pyrazole-3-carboxylate
    • Dye FD and C Yellow No. 5
    • 1H-Pyrazole-3-carboxylic acid,4,5-dihydro-5-oxo-1-(4-sulfophenyl)-4-[(4-sulfophenyl)azo]-, trisodiumsalt
    • Tartrazine FD & C Yellow #5
    • Kayaku Food Colour Yellow No. 4
    • C.I. Acid Yellow 23, trisodium salt
    • m-8847
    • Sodium 5-oxo-1-(4-sulfonatophenyl)-4-((4-sulfonatophenyl)diazenyl)-4,5-dihydro-1H-pyrazole-3-carboxylate
    • Acid Yellow 23 Aluminium lake
    • NSC4760
    • Zlut kysela 23
    • 4,5-Dihydro-5-oxo-1-(4-sulfophenyl)-4-((4-sulfophenyl)azo)-1H-pyrazole-3-carboxylic acid, trisodium salt
    • 4,5-dihydro-5-oxo-1-(4-sulfophenyl)-4-[(4-sulfophenyl)azo]-1h-pyrazole-3-carboxylic acid trisodium salt
    • Trisodium 5-oxo-1-(4-sulfonatophenyl)-4-[(E)-(4-sulfonatophenyl)diazenyl]-4,5-dihydro-1H-pyrazole-3-carboxylate
    • Zlut potravinarska 4
    • 3-Carboxy-5-hydroxy-1-p-sulfophenyl-4-p-sulfophenylazopyrazole trisodium salt
    • 1934-21-0

  • Applications

    Tartrazine (CAS 1934-21-0) is a synthetic azo colorant widely used as a color additive across multiple industries. Key application areas include: food coloring in processed foods and beverages; colorant in cosmetics and personal care products; coloring in pharmaceuticals and medicinal syrups; dyeing for textiles; colorant for polymers/plastics, coatings, and printing inks; and coloring in household and cleaning products. Use is subject to local regulations and formulation limits.

    gpt-5-nano

  • Solubility @25˚C

    Solvent Solubility (g/L)
    ethanol 1.57
    methanol 2.65
    isopropanol 0.68
    water 0.02
    ethyl acetate 1.9
    n-propanol 0.97
    acetone 6.39
    n-butanol 0.54
    acetonitrile 2.86
    DMF 82.34
    toluene 0.44
    isobutanol 0.42
    1,4-dioxane 7.1
    methyl acetate 5.05
    THF 13.46
    2-butanone 6.65
    n-pentanol 0.34
    sec-butanol 0.89
    n-hexane 0.01
    ethylene glycol 1.75
    NMP 82.24
    cyclohexane 0.03
    DMSO 45.88
    n-butyl acetate 1.34
    n-octanol 0.45
    chloroform 1.57
    n-propyl acetate 1.4
    acetic acid 4.92
    dichloromethane 2.59
    cyclohexanone 6.56
    propylene glycol 2.09
    isopropyl acetate 1.08
    DMAc 98.25
    2-ethoxyethanol 7.15
    isopentanol 0.35
    n-heptane 0.02
    ethyl formate 2.52
    1,2-dichloroethane 1.63
    n-hexanol 0.26
    2-methoxyethanol 19.49
    isobutyl acetate 0.34
    tetrachloromethane 0.07
    n-pentyl acetate 1.21
    transcutol 15.64
    n-heptanol 0.43
    ethylbenzene 0.14
    MIBK 0.81
    2-propoxyethanol 6.67
    tert-butanol 0.54
    MTBE 0.61
    2-butoxyethanol 4.05
    propionic acid 3.32
    o-xylene 0.33
    formic acid 7.36
    diethyl ether 0.84
    m-xylene 0.17
    p-xylene 0.18
    chlorobenzene 0.38
    dimethyl carbonate 5.34
    n-octane 0.02
    formamide 20.85
    cyclopentanone 14.9
    2-pentanone 2.35
    anisole 1.34
    cyclopentyl methyl ether 1.65
    gamma-butyrolactone 19.0
    1-methoxy-2-propanol 11.09
    pyridine 7.83
    3-pentanone 2.53
    furfural 19.51
    n-dodecane 0.02
    diethylene glycol 6.88
    diisopropyl ether 0.12
    tert-amyl alcohol 0.81
    acetylacetone 6.47
    n-hexadecane 0.02
    acetophenone 2.44
    methyl propionate 4.5
    isopentyl acetate 0.8
    trichloroethylene 4.97
    n-nonanol 0.52
    cyclohexanol 0.66
    benzyl alcohol 1.51
    2-ethylhexanol 0.21
    isooctanol 0.29
    dipropyl ether 0.67
    1,2-dichlorobenzene 0.42
    ethyl lactate 2.63
    propylene carbonate 4.28
    n-methylformamide 20.46
    2-pentanol 0.32
    n-pentane 0.02
    1-propoxy-2-propanol 4.54
    1-methoxy-2-propyl acetate 4.02
    2-(2-methoxypropoxy) propanol 6.31
    mesitylene 0.09
    ε-caprolactone 6.38
    p-cymene 0.15
    epichlorohydrin 12.38
    1,1,1-trichloroethane 0.42
    2-aminoethanol 2.87
    morpholine-4-carbaldehyde 57.86
    sulfolane 37.41
    2,2,4-trimethylpentane 0.01
    2-methyltetrahydrofuran 3.63
    n-hexyl acetate 1.32
    isooctane 0.0
    2-(2-butoxyethoxy)ethanol 7.08
    sec-butyl acetate 0.62
    tert-butyl acetate 1.13
    decalin 0.01
    glycerin 7.99
    diglyme 16.05
    acrylic acid 5.46
    isopropyl myristate 0.53
    n-butyric acid 1.85
    acetyl acetate 1.5
    di(2-ethylhexyl) phthalate 0.85
    ethyl propionate 1.47
    nitromethane 25.98
    1,2-diethoxyethane 2.84
    benzonitrile 1.38
    trioctyl phosphate 0.49
    1-bromopropane 0.37
    gamma-valerolactone 38.53
    n-decanol 0.39
    triethyl phosphate 1.02
    4-methyl-2-pentanol 0.14
    propionitrile 1.69
    vinylene carbonate 4.57
    1,1,2-trichlorotrifluoroethane 16.95
    DMS 2.96
    cumene 0.08
    2-octanol 0.31
    2-hexanone 1.46
    octyl acetate 0.94
    limonene 0.25
    1,2-dimethoxyethane 13.34
    ethyl orthosilicate 0.76
    tributyl phosphate 0.58
    diacetone alcohol 3.48
    N,N-dimethylaniline 0.98
    acrylonitrile 4.78
    aniline 1.43
    1,3-propanediol 2.74
    bromobenzene 0.3
    dibromomethane 0.8
    1,1,2,2-tetrachloroethane 3.26
    2-methyl-cyclohexyl acetate 1.01
    tetrabutyl urea 1.77
    diisobutyl methanol 0.12
    2-phenylethanol 1.24
    styrene 0.24
    dioctyl adipate 1.4
    dimethyl sulfate 13.62
    ethyl butyrate 1.44
    methyl lactate 8.77
    butyl lactate 2.08
    diethyl carbonate 1.17
    propanediol butyl ether 3.62
    triethyl orthoformate 1.52
    p-tert-butyltoluene 0.13
    methyl 4-tert-butylbenzoate 3.03
    morpholine 11.52
    tert-butylamine 0.17
    n-dodecanol 0.28
    dimethoxymethane 17.79
    ethylene carbonate 2.71
    cyrene 9.13
    2-ethoxyethyl acetate 3.62
    2-ethylhexyl acetate 0.63
    1,2,4-trichlorobenzene 0.97
    4-methylpyridine 4.24
    dibutyl ether 0.59
    2,6-dimethyl-4-heptanol 0.12
    DEF 9.47
    dimethyl isosorbide 9.68
    tetrachloroethylene 1.5
    eugenol 3.79
    triacetin 3.94
    span 80 3.72
    1,4-butanediol 0.9
    1,1-dichloroethane 0.64
    2-methyl-1-pentanol 0.26
    methyl formate 13.37
    2-methyl-1-butanol 0.47
    n-decane 0.03
    butyronitrile 0.86
    3,7-dimethyl-1-octanol 0.31
    1-chlorooctane 0.16
    1-chlorotetradecane 0.07
    n-nonane 0.02
    undecane 0.02
    tert-butylcyclohexane 0.01
    cyclooctane 0.01
    cyclopentanol 1.3
    tetrahydropyran 2.1
    tert-amyl methyl ether 0.75
    2,5,8-trioxanonane 12.22
    1-hexene 0.06
    2-isopropoxyethanol 3.05
    2,2,2-trifluoroethanol 2.94
    methyl butyrate 2.13

    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