Fluorescent brightener 236

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  • Identifiers

    CAS number
    3333-62-8

    Molecular formula
    C25H15N3O2

    SMILES
    C1=CC=C(C=C1)C2=CC3=C(C=C(C=C3)N4N=C5C=CC6=CC=CC=C6C5=N4)OC2=O

    Safety labels

  • Odor profile

    Fragrance
    Floral 59.79%
    Fruity 56.97%
    Neroli 37.39%
    Grape 35.09%
    Animal 34.23%
    Burnt 27.7%
    Orange 27.61%
    Honey 27.52%
    Musty 24.92%
    Powdery 24.71%

     

    Flavor
    Bitter 96.06%
    Very strong 20.36%
    Indole 19.77%
    Moth ball 19.36%
    Naphthelene 18.97%
    Nitrile 18.65%
    Cereal 17.81%
    Cedarleaf 17.7%
    Rotten 17.46%
    Tar 17.42%

     

    Odor impact est.
    Low

  • Properties

    XLogP3-AA
    6.2

    pKa est.
    5.09 (weak acid)

    Molecular weight
    389.4 g/mol

    Vapor pressure est.

    • hPa @ 20°C
    • hPa @ 25°C

    Evaporation rate
    Ultra slow

    Boiling point est.
    1475°C

    Flash point

    • 308.64 ˚C est.

  • Synonyms

    • Fluorescent brightener 236
    • 2H-1-Benzopyran-2-one, 7-(2H-naphtho(1,2-d)triazol-2-yl)-3-phenyl-
    • C.I. Fluorescent Brightener 236
    • EINECS 222-067-7
    • 3-Phenyl-7-(1,2-2H-naphthotriazolyl)coumarin
    • 7NTPC cpd
    • 719IIE6H4M
    • 2H-1-Benzopyran-2-one, 7-(2H-naphtho[1,2-d]triazol-2-yl)-3-phenyl-
    • 7-(2H-Naphtho(1,2-d)triazol-2-yl)-3-phenyl-2-benzopyrone
    • 7-(2H-Naphtho[1,2-d]triazol-2-yl)-3-phenyl-2-benzopyrone
    • 7-(2h-naphtho(1,2-d)triazol-2-yl)-3-phenylcoumarin
    • C.I. 55135
    • 7-(2H-Naphtho[1,2-d]triazol-2-yl)-3-phenylcoumarin
    • 3-PHENYL-7-(2H-NAPHTHO(1,2-D)TRIAZOL-2-YL)COUMARIN
    • COUMARIN, 7-(2H-NAPHTHO(1,2-D)TRIAZOL-2-YL)-3-PHENYL-
    • NAPHTHO(1,2-D)TRIAZOL-2-YL)-3-PHENYL-2H-1-BENZOPYRAN-2-ONE, 7-(2H-
    • RefChem:599382
    • FLUORESCENT BRIGHTENER 236 [INCI]
    • 2H-1-Benzopyran-2-one, 7-(2H-naphtho1,2-dtriazol-2-yl)-3-phenyl-
    • 222-067-7
    • 3333-62-8
    • 7-benzo[e]benzotriazol-2-yl-3-phenylchromen-2-one
    • 7-(2H-Naphtho[1,2-d][1,2,3]triazol-2-yl)-3-phenyl-2H-chromen-2-one
    • UNII-719IIE6H4M
    • Oprea1_482806
    • Oprea1_541948
    • SCHEMBL466678
    • DTXSID6025698
    • SCHEMBL29576644
    • SCHEMBL30288232
    • STK367329
    • AKOS000668641
    • NS00049544
    • ST50735850
    • AE-848/32306054
    • Q27265944
    • 7-(2-hydrobenzo[e]benzotriazol-2-yl)-3-phenylchromen-2-one
    • 7-(2H-Naphtho[1,2-d][1,2,3]triazol-2-yl)-3-phenyl-2H-chromen-2-one #
    • 7-(2H-Naphtho[1,2-d][1,2,3]triazol-2-yl)-3-phenyl-2H-1-benzopyran-2-one
    • 3333-62-8

  • Applications

    Fluorescent brightener 236 (CAS 3333-62-8) is an optical brightening agent used to enhance whiteness and brightness under UV light. Typical applications include textiles to improve fabric brightness, paper and pulp to raise brightness and whiteness, plastics and polymers to increase the optical brightness of plastic products, coatings and inks to boost surface radiance, and detergent or cleaning formulations to help maintain material whiteness. It is also used as a whitening agent in adhesive and binder systems to improve overall brightness of finished assemblies. Use is subject to local regulations and formulation limits.

    gpt-5-nano

  • Solubility @25˚C

    Solvent Solubility (g/L)
    ethanol 0.28
    methanol 0.29
    isopropanol 0.18
    water 0.0
    ethyl acetate 0.59
    n-propanol 0.32
    acetone 0.95
    n-butanol 0.39
    acetonitrile 0.29
    DMF 2.13
    toluene 0.65
    isobutanol 0.25
    1,4-dioxane 2.1
    methyl acetate 0.76
    THF 5.5
    2-butanone 1.59
    n-pentanol 0.43
    sec-butanol 0.27
    n-hexane 0.02
    ethylene glycol 0.14
    NMP 1.35
    cyclohexane 0.01
    DMSO 2.5
    n-butyl acetate 0.75
    n-octanol 0.38
    chloroform 2.24
    n-propyl acetate 0.66
    acetic acid 0.82
    dichloromethane 4.21
    cyclohexanone 2.05
    propylene glycol 0.13
    isopropyl acetate 0.65
    DMAc 4.62
    2-ethoxyethanol 1.25
    isopentanol 0.49
    n-heptane 0.03
    ethyl formate 0.72
    1,2-dichloroethane 2.51
    n-hexanol 0.39
    2-methoxyethanol 1.63
    isobutyl acetate 0.57
    tetrachloromethane 0.12
    n-pentyl acetate 1.31
    transcutol 7.92
    n-heptanol 0.47
    ethylbenzene 0.43
    MIBK 0.95
    2-propoxyethanol 1.79
    tert-butanol 0.19
    MTBE 0.29
    2-butoxyethanol 1.84
    propionic acid 0.45
    o-xylene 0.39
    formic acid 0.54
    diethyl ether 0.45
    m-xylene 0.35
    p-xylene 0.54
    chlorobenzene 0.73
    dimethyl carbonate 0.77
    n-octane 0.03
    formamide 0.93
    cyclopentanone 2.7
    2-pentanone 1.1
    anisole 0.99
    cyclopentyl methyl ether 0.81
    gamma-butyrolactone 2.24
    1-methoxy-2-propanol 1.05
    pyridine 3.5
    3-pentanone 0.9
    furfural 3.49
    n-dodecane 0.04
    diethylene glycol 1.39
    diisopropyl ether 0.14
    tert-amyl alcohol 0.28
    acetylacetone 1.86
    n-hexadecane 0.05
    acetophenone 1.52
    methyl propionate 0.7
    isopentyl acetate 1.04
    trichloroethylene 5.71
    n-nonanol 0.53
    cyclohexanol 0.32
    benzyl alcohol 1.13
    2-ethylhexanol 0.43
    isooctanol 0.52
    dipropyl ether 0.62
    1,2-dichlorobenzene 0.85
    ethyl lactate 0.6
    propylene carbonate 0.99
    n-methylformamide 0.77
    2-pentanol 0.24
    n-pentane 0.01
    1-propoxy-2-propanol 1.15
    1-methoxy-2-propyl acetate 1.46
    2-(2-methoxypropoxy) propanol 2.84
    mesitylene 0.19
    ε-caprolactone 1.65
    p-cymene 0.41
    epichlorohydrin 6.53
    1,1,1-trichloroethane 0.59
    2-aminoethanol 0.25
    morpholine-4-carbaldehyde 2.99
    sulfolane 3.02
    2,2,4-trimethylpentane 0.02
    2-methyltetrahydrofuran 1.31
    n-hexyl acetate 1.09
    isooctane 0.01
    2-(2-butoxyethoxy)ethanol 3.44
    sec-butyl acetate 0.61
    tert-butyl acetate 0.73
    decalin 0.03
    glycerin 0.47
    diglyme 6.58
    acrylic acid 0.68
    isopropyl myristate 0.81
    n-butyric acid 0.79
    acetyl acetate 0.56
    di(2-ethylhexyl) phthalate 1.22
    ethyl propionate 0.62
    nitromethane 1.59
    1,2-diethoxyethane 2.54
    benzonitrile 1.17
    trioctyl phosphate 0.62
    1-bromopropane 0.67
    gamma-valerolactone 4.82
    n-decanol 0.44
    triethyl phosphate 0.7
    4-methyl-2-pentanol 0.26
    propionitrile 0.47
    vinylene carbonate 1.45
    1,1,2-trichlorotrifluoroethane 3.36
    DMS 1.28
    cumene 0.31
    2-octanol 0.33
    2-hexanone 1.22
    octyl acetate 0.87
    limonene 0.37
    1,2-dimethoxyethane 2.97
    ethyl orthosilicate 0.73
    tributyl phosphate 0.8
    diacetone alcohol 1.27
    N,N-dimethylaniline 0.81
    acrylonitrile 0.87
    aniline 0.86
    1,3-propanediol 0.58
    bromobenzene 0.74
    dibromomethane 1.43
    1,1,2,2-tetrachloroethane 3.4
    2-methyl-cyclohexyl acetate 1.01
    tetrabutyl urea 1.5
    diisobutyl methanol 0.36
    2-phenylethanol 1.39
    styrene 0.47
    dioctyl adipate 1.43
    dimethyl sulfate 1.2
    ethyl butyrate 0.77
    methyl lactate 0.72
    butyl lactate 1.3
    diethyl carbonate 0.61
    propanediol butyl ether 1.12
    triethyl orthoformate 0.87
    p-tert-butyltoluene 0.33
    methyl 4-tert-butylbenzoate 2.11
    morpholine 1.7
    tert-butylamine 0.1
    n-dodecanol 0.36
    dimethoxymethane 1.95
    ethylene carbonate 0.93
    cyrene 2.11
    2-ethoxyethyl acetate 2.63
    2-ethylhexyl acetate 0.82
    1,2,4-trichlorobenzene 1.28
    4-methylpyridine 1.73
    dibutyl ether 0.92
    2,6-dimethyl-4-heptanol 0.36
    DEF 1.35
    dimethyl isosorbide 4.7
    tetrachloroethylene 2.37
    eugenol 2.85
    triacetin 1.84
    span 80 1.91
    1,4-butanediol 0.25
    1,1-dichloroethane 0.67
    2-methyl-1-pentanol 0.65
    methyl formate 0.83
    2-methyl-1-butanol 0.43
    n-decane 0.06
    butyronitrile 0.49
    3,7-dimethyl-1-octanol 0.52
    1-chlorooctane 0.32
    1-chlorotetradecane 0.18
    n-nonane 0.04
    undecane 0.05
    tert-butylcyclohexane 0.03
    cyclooctane 0.01
    cyclopentanol 0.33
    tetrahydropyran 1.03
    tert-amyl methyl ether 0.39
    2,5,8-trioxanonane 5.24
    1-hexene 0.14
    2-isopropoxyethanol 1.02
    2,2,2-trifluoroethanol 0.4
    methyl butyrate 0.82

    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