UV-328 is a benzotriazole type ultraviolet light absorber(UVA), imparting good light stability for plastics and other organic polymers.UV-328 protects polymers as well as organic pigments from UV radiation helping to preserve the original appearance and physical integrity of molded articles,films,sheets,and fibers during outdoor weathering.

CAS NO:25973-55-1

EC NO:247-384-8

Molecular Formula:C₂₂H₂₉N₃O

Molecular Weight:351.4852

Synonyms:;2-(2-Hydroxy-3,5-dipenryl-phenyl) benzotriazole;2-(2H-benzotriazol-2-yl)-4,6-bis(1,1-dimethylpropyl)-phenol;2-(2H-hydroxy-3-5-Di-tert-Amyllphenyl)benzotriazole;UV-328;Tinuvin 328;Primesorb328;Ultraviolet absorbent UV-328;2-(2'-Hydroxy-3',5'-di-tert-Pentyl Phenyl)-Benzotriazole;BHSORB-328;2-(2'-Hydroxy-3',5-dipenryl-phenyl) benzotriazole;UV absorber-328;UV absorber UV-328;2-(2H-benzotriazol-2-yl)-4,6-bis(2-methylbutan-2-yl)phenol;Ultraviolet absorberUV-328;2-(2H-Benzotriazol-2-yl)-4,6-di-tert-amylphenol;Ultraviolet absorber UV-328;UV 328;2-(2H-Benzotriazol-2-yl)-4,6-ditertpentylphenol;

Molecular Structure: