Used primarily as an alkylating agent in organic synthesis, this compound is effective in transferring methyl groups to nucleophilic substrates. It finds application in the preparation of methylated derivatives of aromatic and heterocyclic compounds, particularly in pharmaceutical and agrochemical research. Due to its reactivity, it is also employed in the modification of biomolecules for studies in medicinal chemistry. However, its use requires caution as it is toxic and potentially carcinogenic. It is typically handled under controlled conditions with appropriate safety measures.