BSTFA-TMCS (CAS 152571-61-4)

BSTFA-TMCS (N,N-Bis(trimethylsilyl)trifluoroacetamide with trimethylchlorosilane) is a widely used silylation reagent in analytical chemistry for gas chromatography–mass spectrometry (GC–MS) sample preparation. It is a combination of two silylating agents, namely N,N-bis(trimethylsilyl)trifluoroacetamide (BSTFA) and trimethylchlorosilane (TMCS). This versatile reagent enables the derivatization of primary and secondary amines, thiols, and phenols, facilitating their characterization in various applications. The applications of Bstfa-tmcs span across different scientific research areas, notably in drug discovery and environmental monitoring. It finds utility in the analysis of diverse sample types, including biological samples, food samples, and environmental samples. By reacting with amines, thiols, and phenols present in the sample, Bstfa-tmcs forms silyl derivatives that are more volatile than the original compounds. Consequently, these derivatives can be easily detected using GC–MS. The reaction between Bstfa-tmcs and TMCS with amines, thiols, and phenols involves a nucleophilic substitution reaction. In this process, the nucleophilic TMCS attacks the protonated amine, thiol, or phenol, resulting in the formation of a silyl derivative. The subsequent detection of these derivatives using GC–MS contributes to the effective characterization of analytes such as amino acids, peptides, proteins, and steroids.