BLS 234


BLS 234 (70321-86-7) is a low volatile, benzotriazole type, ultraviolet light absorber (UVA), which is highly effective for polymers being processed at high temperatures.   BLS 234 is especially suited for polycarbonates and polyesters.  It protects the polymers from UV radiation helping to preserve the original appearance and physical integrity.


Chemical Name:                     2-[2-hydroxy-3,5-di-(1,1-dimethylbenzyl)]-2H-benzotriazole

CAS Number:                         70321-86-7

Chemical Structure:

BLS 234


Typical Properties         

Product Form:                        Solid Melting Point:                            137-141oC

Molecular Weight:                               447.6 g/mol

Product Details:  Please view our  BLS 234 PDF