BLS 1328


BLS 1328 (25973-55-1) is a benzotriazole type ultraviolet light absorber (UVA), imparting good light stability for plastics and other organic polymers.  BLS 1328 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.


Chemical Name:                     2-(2’-Hydroxy-3’, 5’-di-tert-amylphenyl) benzotriazole

CAS Number:                         25973-55-1

Chemical Structure:

BLS 1328

Typical Properties         

Product Form:                         Solid Melting Point:                 80-88oC

 Molecular Weight:                   351.5 g/mol

Product Details:  Please view our BLS 1328 PDF