Methylation As a mild and selective methylation reagent Dimethyl sulfate is used for the methylation of alcohols, thiols, carboxylic acids and amines to the corresponding ethers, thioethers, esters and dimethyl amines. Reaction scheme Strengths - on-site production and captive use of Dimethyl sulfate - safe handling of carcenogenic Dimethyl sulfate For specific products please check product groups carboxylic acid derivatives, and ethers/thioethers.