Fluorescent Brightener 208

Overview IFRA Request a quote

  • Identifiers

    CAS number
    24565-13-7

    Molecular formula
    C36H34N12Na2O6S2

    SMILES
    CCNC1=NC(=NC(=N1)NC2=CC(=C(C=C2)/C=C/C3=C(C=C(C=C3)NC4=NC(=NC(=N4)NC5=CC=CC=C5)NCC)S(=O)(=O)[O-])S(=O)(=O)[O-])NC6=CC=CC=C6.[Na+].[Na+]

    Safety labels

  • Odor profile

    Fragrance
    Odorless 60.96%
    Meaty 30.43%
    Savory 29.97%
    Cooked 29.43%
    Grape 27.24%
    Fruity 24.81%
    Cheesy 21.33%
    Roasted 20.76%
    Bitter 18.97%
    Animal 18.17%

     

    Flavor
    Bitter 90.19%
    Odorless 35.23%
    Bland 22.8%
    Nitrile 19.68%
    Sweet-like 18.23%
    Very strong 18.07%
    Cedarleaf 18.02%
    Mild 18.02%
    Indole 17.71%
    Bread crust 17.4%

     

    Odor impact est.
    Odorless

  • Properties

    pKa est.
    2.61 (strong acid)

    Molecular weight
    840.8 g/mol

    Flash point

    • 374.0 ˚C est.

  • Synonyms

    • Fluorescent Brightener 208
    • C.I. Fluorescent Brightener 208
    • UNII-NM0B12HGJ3
    • NM0B12HGJ3
    • EINECS 246-320-6
    • CI FLUORESCENT BRIGHTENER 208
    • Disodium 4,4'-bis((4-anilino-6-ethylamino-1,3,5-triazin-2-yl)amino)stilbene-2,2'-disulfonate
    • Benzenesulfonic acid, 2,2'-(1,2-ethenediyl)bis(5-((4-(ethylamino)-6-(phenylamino)-1,3,5-triazin-2-yl)amino)-, disodium salt
    • 2,2'-Stilbenedisulfonic acid, 4,4'-bis((4-anilino-6-ethylamino-s-triazin-2-yl)amino)-, 2Na
    • 2,2'-(1,2-Ethenediyl)bis(5-(4-(ethylamino)-6-(phenylamino)-1,3,5-triazin-2-yl)amino)benzenesulfonic acid, disodium salt
    • 2,2'-STILBENEDISULFONIC ACID, 4,4'-BIS((4-ANILINO-6-ETHYLAMINO-S-TRIAZIN-2-YL)AMINO)-, DISODIUM SALT
    • DISODIUM 4,4'-BIS((4-ANILINO-6-ETHYLAMINO-S-TRIAZIN-2-YL)AMINO)-2,2'-STILBENEDISULFONATE
    • DTXSID0067000
    • RefChem:140901
    • DTXCID8037097
    • 246-320-6
    • 24565-13-7
    • Disodium bisethylphenyltriaminotriazine stilbenedisulfonate
    • DISODIUM 4,4'-BIS[[6-ANILINO-4-(ETHYLAMINO)-1,3,5-TRIAZIN-2-YL]AMINO]STILBENE-2,2'-DISULPHONATE
    • Benzenesulfonic acid, 2,2'-(1,2-ethenediyl)bis(5-((4-(ethylamino)-6-(phenylamino)-1,3,5-triazin-2-yl)amino)-, sodium salt (1:2)
    • Disodium 4,4'-bis((6-anilino-4-(ethylamino)-1,3,5-triazin-2-yl)amino)stilbene-2,2'-disulphonate
    • SCHEMBL3134629
    • NS00083920
    • Q27284941
    • 24565-13-7

  • Applications

    Fluorescent Brightener 208 (CAS 24565-13-7) is an optical brightener used as an additive to boost whiteness and fluorescence under UV light. In polymers and plastics, it is added to resins such as PVC, polyolefins, and polyester to improve brightness and reflectivity. In paper and board, it serves as a fluorescence additive to enhance whiteness. In coatings and inks, it acts as a brightening agent to increase the luminescent appearance of the coatings and prints. In textiles, fibers or fabrics, it is added to improve optical brightness. Its use is subject to local regulations and formulation limits.

    gpt-5-nano

  • Solubility @25˚C

    Solvent Solubility (g/L)
    ethanol 1.05
    methanol 1.53
    isopropanol 0.52
    water 0.01
    ethyl acetate 1.46
    n-propanol 0.93
    acetone 2.94
    n-butanol 0.69
    acetonitrile 0.8
    DMF 8.29
    toluene 0.5
    isobutanol 0.44
    1,4-dioxane 1.93
    methyl acetate 2.11
    THF 5.85
    2-butanone 4.8
    n-pentanol 0.34
    sec-butanol 0.67
    n-hexane 0.01
    ethylene glycol 0.39
    NMP 21.27
    cyclohexane 0.03
    DMSO 5.93
    n-butyl acetate 0.86
    n-octanol 0.12
    chloroform 4.45
    n-propyl acetate 0.71
    acetic acid 2.91
    dichloromethane 4.18
    cyclohexanone 6.06
    propylene glycol 0.73
    isopropyl acetate 0.59
    DMAc 15.91
    2-ethoxyethanol 1.37
    isopentanol 0.36
    n-heptane 0.01
    ethyl formate 1.97
    1,2-dichloroethane 1.9
    n-hexanol 0.2
    2-methoxyethanol 3.47
    isobutyl acetate 0.23
    tetrachloromethane 0.32
    n-pentyl acetate 0.61
    transcutol 1.24
    n-heptanol 0.17
    ethylbenzene 0.12
    MIBK 0.5
    2-propoxyethanol 1.54
    tert-butanol 0.29
    MTBE 0.24
    2-butoxyethanol 0.99
    propionic acid 2.06
    o-xylene 0.21
    formic acid 2.26
    diethyl ether 0.5
    m-xylene 0.16
    p-xylene 0.15
    chlorobenzene 0.68
    dimethyl carbonate 1.33
    n-octane 0.01
    formamide 3.65
    cyclopentanone 9.6
    2-pentanone 2.01
    anisole 0.34
    cyclopentyl methyl ether 0.74
    gamma-butyrolactone 9.35
    1-methoxy-2-propanol 1.99
    pyridine 4.85
    3-pentanone 1.89
    furfural 8.04
    n-dodecane 0.01
    diethylene glycol 0.98
    diisopropyl ether 0.05
    tert-amyl alcohol 0.4
    acetylacetone 2.31
    n-hexadecane 0.01
    acetophenone 0.84
    methyl propionate 2.11
    isopentyl acetate 0.47
    trichloroethylene 6.1
    n-nonanol 0.14
    cyclohexanol 0.51
    benzyl alcohol 0.66
    2-ethylhexanol 0.12
    isooctanol 0.11
    dipropyl ether 0.24
    1,2-dichlorobenzene 0.5
    ethyl lactate 0.64
    propylene carbonate 3.11
    n-methylformamide 4.1
    2-pentanol 0.27
    n-pentane 0.02
    1-propoxy-2-propanol 1.02
    1-methoxy-2-propyl acetate 1.11
    2-(2-methoxypropoxy) propanol 0.98
    mesitylene 0.05
    ε-caprolactone 4.52
    p-cymene 0.06
    epichlorohydrin 7.04
    1,1,1-trichloroethane 0.96
    2-aminoethanol 0.8
    morpholine-4-carbaldehyde 7.76
    sulfolane 12.26
    2,2,4-trimethylpentane 0.01
    2-methyltetrahydrofuran 1.98
    n-hexyl acetate 0.45
    isooctane 0.0
    2-(2-butoxyethoxy)ethanol 0.98
    sec-butyl acetate 0.34
    tert-butyl acetate 0.37
    decalin 0.01
    glycerin 1.6
    diglyme 1.86
    acrylic acid 2.8
    isopropyl myristate 0.15
    n-butyric acid 2.09
    acetyl acetate 0.86
    di(2-ethylhexyl) phthalate 0.34
    ethyl propionate 0.72
    nitromethane 5.89
    1,2-diethoxyethane 0.55
    benzonitrile 0.79
    trioctyl phosphate 0.21
    1-bromopropane 0.8
    gamma-valerolactone 14.6
    n-decanol 0.1
    triethyl phosphate 0.34
    4-methyl-2-pentanol 0.09
    propionitrile 0.98
    vinylene carbonate 3.33
    1,1,2-trichlorotrifluoroethane 8.15
    DMS 0.69
    cumene 0.05
    2-octanol 0.1
    2-hexanone 1.01
    octyl acetate 0.28
    limonene 0.1
    1,2-dimethoxyethane 2.14
    ethyl orthosilicate 0.24
    tributyl phosphate 0.27
    diacetone alcohol 0.97
    N,N-dimethylaniline 0.21
    acrylonitrile 1.79
    aniline 1.01
    1,3-propanediol 1.27
    bromobenzene 0.49
    dibromomethane 1.97
    1,1,2,2-tetrachloroethane 3.96
    2-methyl-cyclohexyl acetate 0.37
    tetrabutyl urea 0.54
    diisobutyl methanol 0.05
    2-phenylethanol 0.46
    styrene 0.16
    dioctyl adipate 0.39
    dimethyl sulfate 2.93
    ethyl butyrate 0.65
    methyl lactate 1.95
    butyl lactate 0.79
    diethyl carbonate 0.45
    propanediol butyl ether 0.66
    triethyl orthoformate 0.45
    p-tert-butyltoluene 0.05
    methyl 4-tert-butylbenzoate 0.68
    morpholine 3.13
    tert-butylamine 0.1
    n-dodecanol 0.07
    dimethoxymethane 2.72
    ethylene carbonate 2.12
    cyrene 1.87
    2-ethoxyethyl acetate 1.12
    2-ethylhexyl acetate 0.4
    1,2,4-trichlorobenzene 0.92
    4-methylpyridine 2.68
    dibutyl ether 0.13
    2,6-dimethyl-4-heptanol 0.05
    DEF 3.06
    dimethyl isosorbide 1.54
    tetrachloroethylene 2.22
    eugenol 0.79
    triacetin 0.72
    span 80 0.77
    1,4-butanediol 0.36
    1,1-dichloroethane 1.34
    2-methyl-1-pentanol 0.24
    methyl formate 3.09
    2-methyl-1-butanol 0.47
    n-decane 0.01
    butyronitrile 0.91
    3,7-dimethyl-1-octanol 0.08
    1-chlorooctane 0.06
    1-chlorotetradecane 0.02
    n-nonane 0.01
    undecane 0.01
    tert-butylcyclohexane 0.0
    cyclooctane 0.01
    cyclopentanol 1.06
    tetrahydropyran 1.38
    tert-amyl methyl ether 0.29
    2,5,8-trioxanonane 1.36
    1-hexene 0.09
    2-isopropoxyethanol 0.6
    2,2,2-trifluoroethanol 1.72
    methyl butyrate 1.13

    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