UV-328

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  • Identifiers

    CAS number
    25973-55-1

    Molecular formula
    C22H29N3O

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

    Safety labels

    Health Hazard
    Health

  • Odor profile

    Fragrance
    Fruity 49.43%
    Musk 36.87%
    Animal 34.0%
    Leathery 31.11%
    Dry 27.82%
    Woody 26.8%
    Vetiver 26.72%
    Floral 26.34%
    Amber 25.94%
    Phenolic 25.35%

     

    Flavor
    Bitter 37.35%
    Musty 26.2%
    Camphor 24.53%
    Earth 22.53%
    Woody 21.66%
    Pepper 21.25%
    Carrot 21.12%
    Green pepper 20.69%
    Herbal 20.41%
    Syrup 20.28%

     

    Odor impact est.
    Low

  • Properties

    XLogP3-AA
    7.4

    pKa est.
    5.45 (weak acid)

    Molecular weight
    351.5 g/mol

    Vapor pressure est.

    • hPa @ 20°C
    • hPa @ 25°C

    Evaporation rate
    Very slow

    Boiling point est.
    544°C

    Flash point

    • 199.67 ˚C est.

    Solubility expt.

    • In water, log -1.37

  • Synonyms

    • 25973-55-1
    • 2-(2H-Benzotriazol-2-yl)-4,6-ditertpentylphenol
    • Phenol, 2-(2H-benzotriazol-2-yl)-4,6-bis(1,1-dimethylpropyl)-
    • 2-(2H-Benzotriazol-2-yl)-4,6-di-tert-pentylphenol
    • UV-328
    • Tinuvin 328
    • VN99CPK4TI
    • Phenol, 2-(2H-benzotriazol-2-yl)-4,6-di-tert-pentyl-
    • CHISORB 328
    • CYASORB UV 2337
    • 247-384-8
    • UV328
    • RefChem:53386
    • UV 328
    • 2-(2H-Benzo[d][1,2,3]triazol-2-yl)-4,6-di-tert-pentylphenol
    • 2-(3,5-Di-tert-amyl-2-hydroxyphenyl)benzotriazole
    • C22H29N3O
    • MFCD00134707
    • 2-(benzotriazol-2-yl)-4,6-bis(2-methylbutan-2-yl)phenol
    • 2-(2'-Hydroxy-3',5'-di-tert-amylphenyl)benzotriazole
    • DTXSID2027886
    • 2-(2-hydroxy-3,5-di-tert-pentylphenyl)benzotriazole
    • 2-(2-Hydroxy-3,5-di-tert-amylphenyl)-2H-benzotriazole
    • 2-(2H-benzotriazol-2-yl)-4,6-bis(1,1-dimethylpropyl)phenol
    • 2-(2-hydroxy-3,5-di-tert-amylphenyl)benzotriazole
    • 2-(2'-Hydroxy-3',5'-di-t-amylphenyl)benzotriazole
    • 2-(3',5'-di-tert-amyl-2'-hydroxyphenyl)benzotriazole
    • EINECS 247-384-8
    • UNII-VN99CPK4TI
    • 4,6-bis(1,1-dimethylpropyl)-2-(2-hydrobenzotriazol-2-yl)phenol
    • CCRIS 8267
    • EC 247-384-8
    • SCHEMBL39146
    • CBDivE_008185
    • 2-(2h-benzotriazol-2-yl)-4,6-di-t-pentylphenol
    • DTXCID107886
    • 2-(3,5-di-tert-amyl-2-hydroxyphenyl)-2H-benzotriazole
    • CHEMBL1879803
    • SCHEMBL11592819
    • SCHEMBL29350743
    • UV-328 (BDTP)
    • HSDB 8417
    • MSK3465
    • Tox21_200465
    • 2-(2H-1,2,3-benzotriazol-2-yl)-4,6-bis(2-methylbutan-2-yl)phenol
    • MSK3465-100A
    • SBB057047
    • STK764131
    • AKOS015895825
    • MSK3465-1000A
    • NCGC00164178-01
    • NCGC00164178-02
    • NCGC00258019-01
    • AS-13202
    • MSK3465-1000
    • SY052583
    • UV-328 Solution in THF, 1000?g/mL
    • CAS-25973-55-1
    • CS-0316293
    • H0718
    • NS00010624
    • ST50218592
    • UV-328 Solution in Acetonitrile, 100ug/mL
    • D78415
    • UV-328 Solution in Acetonitrile, 1000ug/mL
    • 2-(2-hydroxy-3,5-di-t-amylphenyl)benzotriazole
    • SR-01000399546
    • SR-01000399546-1
    • 2,2'-Hydroxy-3',5'-di-tert-amylphenyl-benzotriazole
    • 2-(2'-hydroxy-3', 5'-di-t-amylphenyl)benzotriazole
    • 2-(2'-hydroxy-3',5'-di-t-amylphenyl) benzotriazole
    • 2-(2'-hydroxy-3',5'-di-t-amylphenyl)-benzotriazole
    • 2-(3,5-di-tert-pentyl-2-hydroxyphenyl)benzotriazole
    • Q27291918
    • 2-(2'-hydroxy-3'-5'-di-tert-amylphenyl)benzotriazole
    • 2 -(2-Hydroxy-3,5-di-tert-amylphenyl)-2H-benzotriazole
    • 2-(2H-Benzotriazol-2-yl)-4,6-di-tert-pentylphenol, 98%
    • 2-(benzotriazol-2-yl)-4,6-bis(1,1-dimethylpropyl)phenol
    • 2-(2'-hydroxy-3', 5'-di-tert.-amylphenyl)-2H-benzotriazole
    • 2-(2H-?Benzotriazol-?2-?yl)?-?4,6-?di-tert-pentylphenol
    • 2-(2H-1,2,3-Benzotriazol-2-yl)-4,6-ditert-pentylphenol #
    • 2-(2H-benzotriazol-2-yl)-4,6-bis(2-methylbutan-2-yl)phenol
    • 2-(2'-HYDROXY-3',5'-DI(TERT-AMYL)PHENYL)BENZOTRIAZOLE
    • 2-(2H-1,2,3-Benzotriazol-2-yl)-4,6-bis(1,1-dimethylpropyl)phenol
    • 2-(2H-Benzo[d][1 pound not2 pound not3]triazol-2-yl)-4 pound not6-di-tert-pentylphenol
    • 25973-55-1

  • Applications

    UV-328 (CAS 25973-55-1) is a benzotriazole-based UV absorber used as a stabilizer to protect polymers and coatings from UV-driven degradation. It is commonly incorporated into plastics to prevent color fading and embrittlement, in coatings and inks to improve outdoor durability, in adhesives and sealants to enhance UV resistance, in wood finishes and exterior coatings to extend service life, and in protective films or encapsulants used for electronics to shield sensitive components from sunlight.

    gpt-5-nano

  • Solubility @25˚C

    Solvent Solubility (g/L)
    ethanol 63.14
    methanol 45.56
    isopropanol 39.81
    water 0.03
    ethyl acetate 188.08
    n-propanol 74.47
    acetone 169.45
    n-butanol 69.83
    acetonitrile 47.34
    DMF 445.61
    toluene 147.79
    isobutanol 62.01
    1,4-dioxane 183.11
    methyl acetate 190.14
    THF 552.75
    2-butanone 292.03
    n-pentanol 61.38
    sec-butanol 69.78
    n-hexane 7.9
    ethylene glycol 8.14
    NMP 489.81
    cyclohexane 9.71
    DMSO 135.47
    n-butyl acetate 191.52
    n-octanol 33.73
    chloroform 512.03
    n-propyl acetate 139.22
    acetic acid 70.3
    dichloromethane 503.46
    cyclohexanone 339.21
    propylene glycol 24.24
    isopropyl acetate 128.77
    DMAc 525.09
    2-ethoxyethanol 109.7
    isopentanol 66.91
    n-heptane 6.05
    ethyl formate 89.69
    1,2-dichloroethane 308.44
    n-hexanol 80.46
    2-methoxyethanol 174.99
    isobutyl acetate 115.19
    tetrachloromethane 39.54
    n-pentyl acetate 135.15
    transcutol 388.76
    n-heptanol 45.86
    ethylbenzene 81.76
    MIBK 123.45
    2-propoxyethanol 203.14
    tert-butanol 43.11
    MTBE 106.06
    2-butoxyethanol 122.85
    propionic acid 83.64
    o-xylene 68.66
    formic acid 23.7
    diethyl ether 96.57
    m-xylene 80.51
    p-xylene 123.57
    chlorobenzene 234.52
    dimethyl carbonate 119.55
    n-octane 3.38
    formamide 55.66
    cyclopentanone 487.0
    2-pentanone 208.38
    anisole 161.61
    cyclopentyl methyl ether 203.57
    gamma-butyrolactone 462.68
    1-methoxy-2-propanol 163.45
    pyridine 361.22
    3-pentanone 190.22
    furfural 346.58
    n-dodecane 2.39
    diethylene glycol 90.98
    diisopropyl ether 32.48
    tert-amyl alcohol 71.11
    acetylacetone 219.6
    n-hexadecane 2.92
    acetophenone 180.95
    methyl propionate 230.73
    isopentyl acetate 193.64
    trichloroethylene 732.13
    n-nonanol 37.22
    cyclohexanol 70.35
    benzyl alcohol 117.86
    2-ethylhexanol 62.26
    isooctanol 41.51
    dipropyl ether 65.3
    1,2-dichlorobenzene 196.95
    ethyl lactate 75.42
    propylene carbonate 258.38
    n-methylformamide 134.25
    2-pentanol 49.83
    n-pentane 5.66
    1-propoxy-2-propanol 142.94
    1-methoxy-2-propyl acetate 213.35
    2-(2-methoxypropoxy) propanol 140.12
    mesitylene 37.79
    ε-caprolactone 328.03
    p-cymene 43.69
    epichlorohydrin 650.21
    1,1,1-trichloroethane 236.47
    2-aminoethanol 29.13
    morpholine-4-carbaldehyde 437.41
    sulfolane 450.49
    2,2,4-trimethylpentane 6.26
    2-methyltetrahydrofuran 334.08
    n-hexyl acetate 146.33
    isooctane 3.65
    2-(2-butoxyethoxy)ethanol 168.95
    sec-butyl acetate 121.2
    tert-butyl acetate 131.4
    decalin 10.81
    glycerin 37.97
    diglyme 282.76
    acrylic acid 78.87
    isopropyl myristate 56.86
    n-butyric acid 125.3
    acetyl acetate 104.3
    di(2-ethylhexyl) phthalate 69.63
    ethyl propionate 140.07
    nitromethane 187.61
    1,2-diethoxyethane 147.46
    benzonitrile 122.27
    trioctyl phosphate 45.02
    1-bromopropane 164.56
    gamma-valerolactone 576.52
    n-decanol 27.92
    triethyl phosphate 68.92
    4-methyl-2-pentanol 38.43
    propionitrile 75.57
    vinylene carbonate 230.88
    1,1,2-trichlorotrifluoroethane 275.02
    DMS 178.85
    cumene 52.17
    2-octanol 33.23
    2-hexanone 162.89
    octyl acetate 76.17
    limonene 57.29
    1,2-dimethoxyethane 205.05
    ethyl orthosilicate 65.28
    tributyl phosphate 59.75
    diacetone alcohol 137.14
    N,N-dimethylaniline 110.27
    acrylonitrile 106.11
    aniline 142.97
    1,3-propanediol 54.23
    bromobenzene 256.24
    dibromomethane 282.19
    1,1,2,2-tetrachloroethane 489.2
    2-methyl-cyclohexyl acetate 130.47
    tetrabutyl urea 81.27
    diisobutyl methanol 30.27
    2-phenylethanol 142.29
    styrene 98.96
    dioctyl adipate 91.36
    dimethyl sulfate 184.09
    ethyl butyrate 128.46
    methyl lactate 101.57
    butyl lactate 109.68
    diethyl carbonate 89.9
    propanediol butyl ether 97.91
    triethyl orthoformate 93.59
    p-tert-butyltoluene 41.5
    methyl 4-tert-butylbenzoate 135.91
    morpholine 286.62
    tert-butylamine 26.92
    n-dodecanol 20.85
    dimethoxymethane 239.79
    ethylene carbonate 170.31
    cyrene 161.18
    2-ethoxyethyl acetate 204.6
    2-ethylhexyl acetate 171.54
    1,2,4-trichlorobenzene 259.24
    4-methylpyridine 354.73
    dibutyl ether 52.93
    2,6-dimethyl-4-heptanol 30.27
    DEF 240.7
    dimethyl isosorbide 307.28
    tetrachloroethylene 244.84
    eugenol 138.68
    triacetin 139.61
    span 80 110.74
    1,4-butanediol 21.57
    1,1-dichloroethane 250.95
    2-methyl-1-pentanol 75.24
    methyl formate 109.26
    2-methyl-1-butanol 78.59
    n-decane 4.2
    butyronitrile 80.71
    3,7-dimethyl-1-octanol 45.82
    1-chlorooctane 30.34
    1-chlorotetradecane 11.91
    n-nonane 3.66
    undecane 3.07
    tert-butylcyclohexane 9.8
    cyclooctane 3.4
    cyclopentanol 89.35
    tetrahydropyran 214.7
    tert-amyl methyl ether 101.48
    2,5,8-trioxanonane 186.51
    1-hexene 45.4
    2-isopropoxyethanol 89.96
    2,2,2-trifluoroethanol 33.21
    methyl butyrate 176.92

    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