PROCESS FOR THE PREPARATION OF MALATHION AND ITS INTERMEDIATE

摘要

The present invention relates to the improved process for the preparation of highly pure form of S-[1,2-(dicarbethoxy)-ethyl]O,O-dimethyl phosphorodithioate having formula (I). The compound of formula (I) has adopted name“Malathion”. The present invention also relates to the novel process of preparing intermediate O,O-dimethyldithiophosphoric acid of formula (II), which is useful in the preparation of Malathion.