A compound containing the –SCN group, typically a salt or ester of thiocyanic acid (HSCN). Thiocyanates are bonded through the sulfur(s) and have the structure R–S–C≡N. They are isomeric with the isothiocyanates, R–N=C≡S, which are the sulfur analogs of isocyanates (–NCO). The thiocyanates may be viewed as structural analogs of the cyanates (–OCN), where the oxygen (O) atom is replaced by a sulfur atom.