Used as a methylating agent in organic synthesis, particularly for transferring methyl groups to nucleophiles under mild conditions. It is effective in the preparation of heterocyclic compounds and pharmaceutical intermediates where controlled methylation is required. Its stability and solubility in polar solvents make it suitable for use in electrochemical applications and as a reagent in the synthesis of sulfonium-based ionic liquids. Also employed in research settings for generating ylides in Wittig-type reactions.