BLS 783


BLS 783 (65447-77-0 & 70624-18-9) is a synergistic blend of the hindered amine light stabilizers BLS 1622 and BLS 1944.  The product is highly effective to improve the light stability of polyethylene (HDPE, LLDPE, LDPE) thick section parts, films, and tapes as well as polypropylene fibers and films.  BLS 783 is non-discoloring, has good compatibility with polyolefin substrates, is highly resistant to extraction, and is FDA-cleared for use in many types of polyolefins for indirect food contact applications.


Chemical Names:                BLS 1622:    Butanedioic acid, dimethyl ester, polymer with

                                                                 4-hydroxy-2,2,6,6-tetramethyl-1-piperidine ethanol

                                             BLS 1944:   1,6-Hexanediamine, N,N’-bis

                                                                 (2,2,6,6-tetramethyl-4 piperidinyl)-, polymer with

                                                                 2,4,6-trichloro-1,3,5-triazine, reaction products with


CAS Numbers:                     BLS 1622:  65447-77-0

                                              BLS 1944:  70624-18-9

 Chemical Structure:

BLS 1622                                                    BLS 1944

BLS 1622    BLS 1944

Typical Properties

Product Form:                    Solid

Melting Range:                   BLS 1622:  110 – 125oC

                                             BLS 1944:   50 – 70oC

Molecular Weight:              BLS 1622:  Mn > 2500 g/mol

                                             BLS 1944:  Mn > 2500 g/mol

Product Details:  Please view our BLS 783 PDF