CAS Registry Number

CAS 19980-43-9 — 1-(Trimethylsiloxy)cyclopentene

1-(Trimethylsiloxy)cyclopentene is a silyl enol ether used primarily as a versatile intermediate in organic synthesis, particularly in the preparation of complex molecules, natural products, and pharmaceuticals. It enables selective reactions such as aldol condensations and Diels-Alder cycloadditions due to its reactive enol ether functionality. This chemical has a CAS number of 19980-43-9, with the molecular formula C8H16OSi (C5H7OSi(CH3)3) and a molecular weight of 156.30 g/mol. It should be stored at ambient conditions, and while it carries a warning signal word, it is generally stable under proper handling. Molekula supplies 1-(Trimethylsiloxy)cyclopentene from research to bulk quantities with full documentation and ISO 9001:2015 traceability.