2,4-Di-tert-butyl-6-(5-chloro-2H-benzotriazol-2-yl)phenol

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  • Identifiers

    CAS number
    3864-99-1

    Molecular formula
    C20H24ClN3O

    SMILES
    CC(C)(C)C1=CC(=C(C(=C1)N2N=C3C=CC(=CC3=N2)Cl)O)C(C)(C)C

    Safety labels

    Health Hazard
    Health

  • Odor profile

    Fragrance
    Fruity 48.39%
    Musk 43.65%
    Animal 36.26%
    Leathery 33.67%
    Dry 32.38%
    Woody 31.64%
    Amber 27.85%
    Fatty 27.76%
    Phenolic 27.46%
    Vetiver 26.53%

     

    Flavor
    Bitter 55.11%
    Musty 23.97%
    Camphor 22.81%
    Green pepper 21.36%
    Carrot 20.83%
    Cedarleaf 20.34%
    Mild 20.23%
    Thymol 20.21%
    Syrup 20.17%
    Creosote 19.93%

     

    Odor impact est.
    Low

  • Properties

    XLogP3-AA
    6.9

    pKa est.
    4.42 (weak acid)

    Molecular weight
    357.9 g/mol

    Vapor pressure est.

    • hPa @ 20°C
    • hPa @ 25°C

    Evaporation rate
    Ultra slow

    Boiling point est.
    519°C

    Melting point expt.

    • 153 - 154 °C

    Flash point

    • 191.53 ˚C est.

  • Synonyms

    • 3864-99-1
    • 2,4-Di-tert-butyl-6-(5-chloro-2H-benzotriazol-2-yl)phenol
    • UV-327
    • Phenol, 2-(5-chloro-2H-benzotriazol-2-yl)-4,6-bis(1,1-dimethylethyl)-
    • EINECS 223-383-8
    • 2,4-Di-tert-butyl-6-(5-chlorobenzotriazol-2-yl)phenol
    • 17TJE602RX
    • ANTIOXIDANT 327
    • 2-(5-Chloro-2H-benzotriazol-2-yl)-4,6-di-tert-butylphenol
    • 2-(3',5'-Di-tert-butyl-2'-hydroxyphenyl)-5-chloro-2H-benzotriazole
    • DTXSID4038893
    • LA-34
    • Phenol, 2,4-di-tert-butyl-6-(5-chloro-2H-benzotriazol-2-yl)-
    • RefChem:443144
    • DTXCID2018893
    • 2-(5-chloro-benzotriazol-2-yl)-4,6-di-(tert-butyl)phenol
    • 2,4-Di-tert-butyl-6-(5-chloro-2H-benzo[d][1,2,3]triazol-2-yl)phenol
    • 2-(3,5-Di-tert-butyl-2-hydroxyphenyl)-5-chlorobenzotriazole
    • 2,4-ditert-butyl-6-(5-chlorobenzotriazol-2-yl)phenol
    • C20H24ClN3O
    • 2-(2'-HYDROXY-3',5'-DI-TERT-BUTYLPHENYL)-5-CHLOROBENZOTRIAZOLE
    • MFCD00059706
    • 2,4-di-tert-butyl-6-(5-chloro-2H-1,2,3-benzotriazol-2-yl)phenol
    • 5-chloro-2-(3,5-di-tert-butyl-2-hydroxyphenyl)-2h-benzotriazole
    • 2-(2-hydroxy-3,5-di-tert-butylphenyl)-5-chlorobenzotriazole
    • Tinuvin 327
    • Uvazol 237
    • UNII-17TJE602RX
    • 2,4-Di-tert-butyl-6-(5-chlorobenzotriazol-2-yl) phenol
    • SCHEMBL29241
    • CBDivE_008145
    • BIDD:ER0467
    • UV-2
    • 2,4-Di-tert-butyl-6-(5-chloro-2-benzotriazolyl)phenol
    • SCHEMBL29349567
    • MSK3454
    • CHEBI:169475
    • 2,4-Di-tert-butyl-6-(5-chloro-2H-?benzotriazol-?2-?yl)?phenol
    • 2-(3',5'-Di-Tert-Butyl-2'-Hydroxyphenyl)-5-Chlorobenzotriazole
    • 5-Chloro-2-(2-hydroxy-3,5-di-tert-butylphenyl)-2H-benzotriazole
    • STK051072
    • AKOS005385757
    • AC-15278
    • AS-70325
    • SY050040
    • CS-0154920
    • D1529
    • NS00002300
    • ST50826273
    • D70556
    • Q27251940
    • 2,4-Di- t-butyl-6(5-chloro-2H-benzotriazol-2-yl)phenol
    • 2,4-di-t-butyl-6-(5-chloro-2h-benzotriazol-2-yl)phenol
    • 2-(3,5-di-t-butyl-2-hydroxyphenyl)-5-chlorobenzotriazole
    • 2(2'-hydroxy-3',5'-di-tert-butylphenyl)-5-chlorobenzotriazol
    • 2,4-di-tert-butyl-6-(5-chloro-2H-benzo-triazol-2-yl)phenol
    • 2-(2'-hydroxy-3',5'-di-t-butyl phenyl)-5-chlorobenzotriazole
    • 2-(2'-hydroxy-3',5'-di-t-butyl-phenyl)-5-chlorobenzotriazole
    • 2-(2'-hydroxy-3',5'-di-t-butylphenyl)-5-chlorbenzotriazole
    • 2-(2'-hydroxy-3',5'-di-t-butylphenyl)-5-chlorobenzotriazole
    • 2-(2'-hydroxy-3',5'-di-tertbutylphenyl)-5-chlorobenzotriazole
    • 2-(3',5'-Di-t-butyl-2'-hydroxyphenyl)-5-chlorobenzotriazole
    • 5-chloro-(2-hydroxy-3,5-di-tert-butylphenyl)-2H-benzotriazole
    • 5-Chloro-2-(3,5-di-tert-butyl-2-hydroxyphenyl)benzotriazole
    • 2,4-Di-tert-butyl-6-(5-chloro-2H-benzotriazol-2-yl)phenol, 8CI
    • 2,4-Di-tert-butyl-6-(5-chloro-2H-benzotriazol-2-yl)phenol, 98%
    • 2-(2'-hydroxy-3',5'-di-tert-butylphenyl)-5-chlorobenzotriazol
    • 2-(2-HYDROXY-3,5-DI-TERT-BUTYL)PHENYL-5-CHLOROBENZOTRIAZOLE
    • 4,6-bis(tert-butyl)-2-(5-chloro(2-hydrobenzotriazol-2-yl))phenol
    • 5-chloro-(2-hydroxy-3,5-di-tert-butyl-phenyl)-2H-benzotriazole
    • 5-Chloro-2-(2-hydroxy-3,5-di-tert-butylphenyl)-2 H-benzotriazole
    • 5-Chloro-2-(2-hydroxy-3,5-di-tert-butylphenyl)2H-benzotriazole
    • 2,4-Di-tert-butyl-6-(5-chloro-2H-benzo-[d][1,2,3]triazol-2-yl)phenol
    • 2-(5-Chloro-2H-benzotriazol-2-yl)-4,6-bis(1,1-dimethylethyl)phenol, 9CI
    • 2,4-Di-tert-butyl-6-(5-chloro-2H-benzotriazol-2-yl)phenol, certified reference material, TraceCERT(R)
    • 3864-99-1

  • Applications

    2,4-Di-tert-butyl-6-(5-chloro-2H-benzotriazol-2-yl)phenol (CAS 3864-99-1) is typically used as a combined UV absorber and hindered phenol antioxidant in polymer and coating formulations, providing improved light fastness and thermal-oxidative stability. Common applications include stabilizing plastics such as polyolefins and PVC, protecting architectural and automotive coatings and inks from UV degradation, and enhancing the durability of adhesives and sealants. It may also be incorporated into electronics encapsulants and specialty polymers exposed to sunlight to extend service life, subject to formulation constraints and local regulations.

    gpt-5-nano

  • Solubility @25˚C

    Solvent Solubility (g/L)
    ethanol 23.36
    methanol 16.68
    isopropanol 17.43
    water 0.03
    ethyl acetate 33.33
    n-propanol 27.06
    acetone 50.17
    n-butanol 24.48
    acetonitrile 15.73
    DMF 137.23
    toluene 33.0
    isobutanol 22.64
    1,4-dioxane 48.77
    methyl acetate 43.46
    THF 224.44
    2-butanone 74.62
    n-pentanol 29.59
    sec-butanol 23.88
    n-hexane 1.09
    ethylene glycol 5.33
    NMP 174.4
    cyclohexane 1.08
    DMSO 59.52
    n-butyl acetate 56.72
    n-octanol 26.74
    chloroform 110.44
    n-propyl acetate 44.69
    acetic acid 27.35
    dichloromethane 89.86
    cyclohexanone 105.39
    propylene glycol 18.81
    isopropyl acetate 26.23
    DMAc 139.49
    2-ethoxyethanol 51.3
    isopentanol 22.99
    n-heptane 1.87
    ethyl formate 31.7
    1,2-dichloroethane 46.16
    n-hexanol 36.98
    2-methoxyethanol 69.59
    isobutyl acetate 40.1
    tetrachloromethane 6.76
    n-pentyl acetate 55.36
    transcutol 102.92
    n-heptanol 30.82
    ethylbenzene 22.15
    MIBK 33.88
    2-propoxyethanol 93.83
    tert-butanol 19.16
    MTBE 19.36
    2-butoxyethanol 67.78
    propionic acid 27.45
    o-xylene 15.44
    formic acid 10.96
    diethyl ether 13.49
    m-xylene 20.15
    p-xylene 36.19
    chlorobenzene 51.43
    dimethyl carbonate 26.24
    n-octane 1.36
    formamide 21.2
    cyclopentanone 187.26
    2-pentanone 51.47
    anisole 50.72
    cyclopentyl methyl ether 58.02
    gamma-butyrolactone 162.21
    1-methoxy-2-propanol 70.52
    pyridine 114.05
    3-pentanone 36.08
    furfural 137.09
    n-dodecane 1.36
    diethylene glycol 49.8
    diisopropyl ether 4.6
    tert-amyl alcohol 25.13
    acetylacetone 62.67
    n-hexadecane 1.57
    acetophenone 69.31
    methyl propionate 45.56
    isopentyl acetate 59.07
    trichloroethylene 145.69
    n-nonanol 27.22
    cyclohexanol 23.72
    benzyl alcohol 54.24
    2-ethylhexanol 29.63
    isooctanol 26.72
    dipropyl ether 22.66
    1,2-dichlorobenzene 40.24
    ethyl lactate 35.18
    propylene carbonate 94.28
    n-methylformamide 45.85
    2-pentanol 16.3
    n-pentane 0.72
    1-propoxy-2-propanol 70.78
    1-methoxy-2-propyl acetate 69.49
    2-(2-methoxypropoxy) propanol 70.81
    mesitylene 8.52
    ε-caprolactone 99.82
    p-cymene 18.93
    epichlorohydrin 184.84
    1,1,1-trichloroethane 40.02
    2-aminoethanol 16.98
    morpholine-4-carbaldehyde 140.87
    sulfolane 183.54
    2,2,4-trimethylpentane 1.06
    2-methyltetrahydrofuran 104.88
    n-hexyl acetate 60.77
    isooctane 0.65
    2-(2-butoxyethoxy)ethanol 78.68
    sec-butyl acetate 32.01
    tert-butyl acetate 32.54
    decalin 1.92
    glycerin 26.24
    diglyme 97.06
    acrylic acid 28.1
    isopropyl myristate 25.44
    n-butyric acid 40.56
    acetyl acetate 21.34
    di(2-ethylhexyl) phthalate 38.06
    ethyl propionate 36.38
    nitromethane 59.86
    1,2-diethoxyethane 41.55
    benzonitrile 53.92
    trioctyl phosphate 25.55
    1-bromopropane 26.84
    gamma-valerolactone 213.52
    n-decanol 20.34
    triethyl phosphate 24.66
    4-methyl-2-pentanol 13.08
    propionitrile 23.22
    vinylene carbonate 74.54
    1,1,2-trichlorotrifluoroethane 109.5
    DMS 46.84
    cumene 15.66
    2-octanol 24.18
    2-hexanone 56.83
    octyl acetate 35.52
    limonene 20.87
    1,2-dimethoxyethane 75.09
    ethyl orthosilicate 23.71
    tributyl phosphate 26.87
    diacetone alcohol 54.97
    N,N-dimethylaniline 41.47
    acrylonitrile 35.16
    aniline 41.66
    1,3-propanediol 25.89
    bromobenzene 51.85
    dibromomethane 52.1
    1,1,2,2-tetrachloroethane 95.72
    2-methyl-cyclohexyl acetate 52.12
    tetrabutyl urea 44.81
    diisobutyl methanol 14.21
    2-phenylethanol 65.39
    styrene 24.96
    dioctyl adipate 42.67
    dimethyl sulfate 42.79
    ethyl butyrate 43.13
    methyl lactate 39.39
    butyl lactate 59.09
    diethyl carbonate 27.31
    propanediol butyl ether 71.83
    triethyl orthoformate 34.73
    p-tert-butyltoluene 17.65
    methyl 4-tert-butylbenzoate 65.79
    morpholine 79.64
    tert-butylamine 9.08
    n-dodecanol 14.75
    dimethoxymethane 64.58
    ethylene carbonate 50.47
    cyrene 98.67
    2-ethoxyethyl acetate 66.95
    2-ethylhexyl acetate 52.3
    1,2,4-trichlorobenzene 58.85
    4-methylpyridine 104.32
    dibutyl ether 22.5
    2,6-dimethyl-4-heptanol 14.21
    DEF 50.31
    dimethyl isosorbide 152.75
    tetrachloroethylene 44.8
    eugenol 79.25
    triacetin 53.68
    span 80 67.15
    1,4-butanediol 15.38
    1,1-dichloroethane 42.98
    2-methyl-1-pentanol 29.52
    methyl formate 39.19
    2-methyl-1-butanol 25.33
    n-decane 2.22
    butyronitrile 28.53
    3,7-dimethyl-1-octanol 26.87
    1-chlorooctane 14.65
    1-chlorotetradecane 5.89
    n-nonane 1.81
    undecane 1.7
    tert-butylcyclohexane 2.12
    cyclooctane 0.47
    cyclopentanol 40.49
    tetrahydropyran 53.71
    tert-amyl methyl ether 20.81
    2,5,8-trioxanonane 81.28
    1-hexene 9.19
    2-isopropoxyethanol 43.05
    2,2,2-trifluoroethanol 11.59
    methyl butyrate 53.81

    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