Description

UV-328 (2-(benzotriazol-2-yl)-4,6-bis(2-methylbutan-2-yl)phenol) is a high-performance benzotriazole-based ultraviolet (UV) light absorber widely used in polymer stabilization. With the molecular formula C₂₂H₂₉N₃O, it effectively absorbs UV radiation in the 290-400 nm range, protecting materials from photodegradation. This compound is particularly valued for its excellent compatibility with polyolefins, PVC, coatings, adhesives, and other organic substrates. UV-328 exhibits low volatility, high thermal stability, and resistance to extraction, making it ideal for long-term outdoor applications. Its chemical structure ensures minimal color contribution, preserving the aesthetic qualities of treated materials. Suitable for industrial and research use, it is available in high-purity grades to meet stringent quality requirements.

Properties

• CAS Number: 25973-55-1
• Complexity: 464
• IUPAC Name: 2-(benzotriazol-2-yl)-4,6-bis(1,1-dimethylpropyl)phenol
• InChI: InChI=1S/C22H29N3O/c1-7-21(3,4)15-13-16(22(5,6)8-2)20(26)19(14-15)25-23-17-11-9-10-12-18(17)24-25/h9-14,26H,7-8H2,1-6H3
• InChI Key: ZMWRRFHBXARRRT-UHFFFAOYSA-N
• Exact Mass: 351.231062557
• Molecular Formula: C22H29N3O
• Molecular Weight: 351.5
• SMILES: CCC(C)(C)C1=CC(=C(C(=C1)N2N=C3C=CC=CC3=N2)O)C(C)(C)CC
• Topological: 50.9
• Monoisotopic Mass: 351.231062557
• Physical Description: Dry Powder, Pellets or Large Crystals; NKRA; Other Solid; Dry Powder
• Color/Form: White to yellow powder or crystals
• Solubility: In water, log -1.37
• Stability/Shelf Life: Stable under recommended storage conditions.
• Synonyms: 25973-55-1, 2-(2H-Benzotriazol-2-yl)-4,6-ditertpentylphenol, 2-(2H-Benzotriazol-2-yl)-4,6-di-tert-pentylphenol, 2-(3,5-Di-tert-amyl-2-hydroxyphenyl)benzotriazole, Tinuvin 328, UV-328, UNII-VN99CPK4TI, VN99CPK4TI, EINECS 247-384-8, 2-(2′-Hydroxy-3′,5′-di-tert-amylphenyl)benzotriazole, Phenol, 2-(2H-benzotriazol-2-yl)-4,6-di-tert-pentyl-, CCRIS 8267, CHISORB 328, CYASORB UV 2337, HSDB 8417, EC 247-384-8, 2-(2-hydroxy-3,5-di-tert-amylphenyl)benzotriazole, 2-(3′,5′-di-tert-amyl-2′-hydroxyphenyl)benzotriazole, 2-(3,5-di-tert-pentyl-2-hydroxyphenyl)benzotriazole, 2-(3,5-di-tert-amyl-2-hydroxyphenyl)-2H-benzotriazole, 247-384-8, UV328, UV 328, 2-(2′-Hydroxy-3,5-di-tert-amylphenyl) benzotriazole, 2-(2H-Benzo[d][1,2,3]triazol-2-yl)-4,6-di-tert-pentylphenol, Phenol, 2-(2H-benzotriazol-2-yl)-4,6-bis(1,1-dimethylpropyl)-, 2-(benzotriazol-2-yl)-4,6-bis(2-methylbutan-2-yl)phenol, DTXSID2027886, 2-(2-hydroxy-3,5-di-tert-pentylphenyl)benzotriazole, 2-(2′-Hydroxy-3′,5′-di-t-amylphenyl)benzotriazole, 2-(2-Hydroxy-3,5-di-tert-amylphenyl)-2H-benzotriazole, 2-(2H-benzotriazol-2-yl)-4,6-bis(1,1-dimethylpropyl)phenol, C22H29N3O, 4,6-bis(1,1-dimethylpropyl)-2-(2-hydrobenzotriazol-2-yl)phenol, MFCD00134707, SCHEMBL39146, CBDivE_008185, DTXCID107886, CHEMBL1879803, SCHEMBL11592819, UV-328 (BDTP), MSK3465, Tox21_200465, SBB057047, STK764131, AKOS015895825, 1ST3465, NCGC00164178-01, NCGC00164178-02, NCGC00258019-01, AS-13202, MSK3465-1000, UV-328 Solution in THF, 1000?g/mL, UV-328 Solution in THF, 1000mug/mL, CAS-25973-55-1, CS-0316293, H0718, NS00010624, ST50218592, 1ST3465-1000, D78415, 2-(2-hydroxy-3,5-di-t-amylphenyl)benzotriazole, 2-(2h-benzotriazol-2-yl)-4,6-di-t-pentylphenol, 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, 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-(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

Application

UV-328 is primarily used as a UV stabilizer in plastics, coatings, and synthetic polymers to prevent degradation caused by sunlight exposure. It is highly effective in automotive coatings, agricultural films, and construction materials where prolonged UV resistance is critical. The compound also finds application in packaging materials to extend shelf life by blocking harmful UV radiation. Researchers utilize UV-328 in studies involving photostabilization and polymer chemistry.

Safety and Hazards

GHS Hazard Statements

• H373: May causes damage to organs through prolonged or repeated exposure [Warning Specific target organ toxicity, repeated exposure]
• H413: May cause long lasting harmful effects to aquatic life [Hazardous to the aquatic environment, long-term hazard]

Precautionary Statements

• P260, P273, P319, and P501

Hazard Classes and Categories

• STOT RE 2 (85.7%)
• Aquatic Chronic 4 (88.3%)

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Disclaimer: Sold exclusively for laboratory research. Prohibited for commercial use, diagnostics, or human/animal applications. Buyers assume all compliance liability.