Thiodiglycol is the organosulfur structurally similar to diethylene glycol used as a solvent in a variety of applications ranging from dyeing textiles to inks in some ballpoint pens. In chemical synthesis, it is used as a building block for protection products, dispersants, fibers, plasticizers, rubber accelerators, pesticides, dyes, and various other organic chemicals. In the manufacture of polymers, it is used as a chain transfer agent. Thiodiglycol is a precursor in the production of Sulfur mustard and it is also considered as a “Schedule 2” compound (dual-use chemicals with low to moderate commercial use and high-risk precursors) within the terms of the Chemical Weapons Convention treaty.