1、Appearance: White powder
2、Melting point:103-105℃
3、Content: ≥99% (HPLC)
4、Transmittance: 440nm≥97% 500nm≥98%
UV-329 is a benzotriazole type ultraviolet light absorber(UVA), imparting good light stability for plastics and other organic polymers. UV-329 is an effective light stabilizer for a variety of plastics and other organic substrates.

CAS NO:3147-75-9;123307-21-1

EC NO:221-573-5

Molecular Formula:C₂₀H₂₅N₃O

Molecular Weight:323.432

Synonyms:;Octrizole;2-benzotriazol-2-yl-4-(1,1,3,3-tetramethylbutyl)phenol;2-(2-Hydroxy-5-tert-octylphenyl)benzotriazole;UV-329;2-(2'-Hydroxy-5'-(1,1,3,3-tetramethylbutyl)phenyl)benzotriazole;Cyasorb 5411;Tinuvin 5411;Primesorb5411;2-(2'-Hydroxy-5'-tert-Octyl Phenyl)-Benzotriazole;BHSORB-329;2-(2'-hydroxy-5-tert-octylphenyl) benzotriazole;2-(2'-HYDROXY-5'-TERT-OCTYLLPHENYL)Benzotriazole;2-(2'-HYDROXY-5'-TERT-OCTYL PHENYL) Benzotriazole;LABOTEST-BB LT00053579;EUSORB 323;TINUVIN 329;UV absorber-329;2-(2H-benzotriazol-2-yl)-4-(2,4,4-trimethylpentan-2-yl)phenol;Ultraviolet absorberUV-329;2-(2H-Benzotriazol-2-yl)-4-tert-octylphenol;Ultraviolet absorbent UV-329;UV 329;UV-5411;

Molecular Structure: