o-[(p-isocyanatophenyl)thio]phenyl isocyanate

2,4''-Diisocyanatodiphenyl Sulfide is used in the synthesis of polyurethanes.Environmental toxin on US EPA Toxic Release Inventory list (TRI) list.

Isocyanates and thioisocyanates are incompatible with many classes of compounds, reacting exothermically to release toxic gases. Reactions with amines, aldehydes, alcohols, alkali metals, ketones, mercaptans, strong oxidizers, hydrides, phenols, and peroxides can cause vigorous releases of heat. Acids and bases initiate polymerization reactions in these materials. Some isocyanates react with water to form amines and liberate carbon dioxide. Polyurethanes are formed by the condensation reaction of diisocyanates with, for example, ethyl glycol.