Thiourea

Thiourea is an odorless crystalline compound that was first synthesized by fusing NH₄SCN (R. E. Powers, 1951).Today it is manufactured, chiefly in Germany, China, and Japan, by the reaction of H₂S and CaCN₂. Its uses include photographic processing, rubber manufacture, and organic synthesis. Recently, D. Seidel and co-workers used thiourea and other inexpensive reagents in acylation reactions to give products that can be enantiomerically resolved.