• Derivatizing agent for amino groups. Introduced by Edman for the determination of amino acid sequence by conversion to the thiourea, acid cleavage of the peptide bond and alkaline hydrolysis of the derived thiohydantoin: Acta Chem. Scand., 4, 277 (1950); Arkiv. Kemi., 14, 291 (1959). The thiourea can also be cleaved with TFA: Nature, 227, 716 (1970), or by peracid oxidation: Chem. Ber., 89, 2288 (1956).
• For general reactions of isothiocyanates, see Appendix 3.