Dimethyl sulfate is also under pressure to be phased out due to reasons similar to phosgene, and when DMC's methyl carbon is attacked by a nucleophilic nucleophile, its alkyl-oxygen bond breaks, and methylated products are also formed, and using DMC has a higher reaction yield and simpler process than dimethyl sulfate. The main uses include the synthesis of organic intermediates, pharmaceutical products, pesticide products, etc.