CAS Registry Number

CAS 121-45-9 — Trimethyl phosphite

Trimethyl phosphite (CAS 121-45-9) is a colorless liquid organophosphorus compound widely used as a reagent in organic synthesis, particularly for the preparation of phosphonates, phosphine oxides, and as a methylating agent in chemical research and industrial processes. It is also employed in pesticide and flame-retardant production. This chemical has the molecular formula C3H9O3P and a molecular weight of 124.08. It should be stored at ambient conditions but handled with care due to its **Danger** classification under GHS, requiring proper protective measures. Molekula supplies Trimethyl phosphite from research to bulk quantities with full documentation and ISO 9001:2015 traceability.