Mercaptobenzothiazole | chemical compound | Britannica

…until it was displaced by mercaptobenzothiazole (MBT) about 1925. Compounds related to MBT have proved especially useful in vulcanizing synthetic rubbers.

2-Mercaptobenzothiazole is a thiol that finds use as an accelerator in the vulcanization of rubber (see below Disulfides and polysulfides and their oxidized products) and as a corrosion inhibitor, whereas 6-mercaptopurine has been employed in cancer therapy.