CAS Registry Number

CAS 128625-52-5 — Benzotriazole-1-yl-oxy-tris-pyrrolidino-phosphonium hexafluorophosphate

Benzotriazole-1-yl-oxy-tris-pyrrolidino-phosphonium hexafluorophosphate (BOP) is a widely used coupling reagent in peptide synthesis, enabling efficient amide bond formation under mild conditions. It is also employed in organic synthesis for activating carboxyl groups in esterifications and other transformations. This chemical has a CAS number of 128625-52-5, with the molecular formula C18H28N6OP·PF6 and a molecular weight of 520.39. It is stored at ambient conditions and carries a warning signal word for safety. Molekula supplies BOP from research to bulk quantities with full documentation and ISO 9001:2015 traceability.