Dimethyltin bis(2-ethylhexyl thioglycolate)

Dimethyltin bis(2-ethylhexyl thioglycolate), CAS 57583-35-4, is an organotin compound supplied under trade designations including DMTTG, DL 181, NX 128, SC 688, and MT 181. It carries no assigned E-code and is classified within the organometallic compounds category with the molecular formula C22H44O4S2Sn.

This compound functions as a heat stabilizer in PVC processing, where the tin-sulfur coordination chemistry interrupts the dehydrochlorination chain reaction that causes polymer degradation at elevated processing temperatures. It is applied in rigid and semi-rigid PVC formulations, including pipe, profile, and sheet extrusion, where it provides antioxidant activity alongside thermal stabilization.

Dimethyltin bis(2-ethylhexyl thioglycolate) is subject to REACH registration requirements within the European Economic Area, and procurement should confirm supplier compliance documentation accordingly. It is typically available in liquid form and supplied in standard industrial drum packaging, with grade selection dependent on application-specific tin content requirements.