Iodomethane, also known as methyl iodide, is a chemical compound with the formula CH₃I. It is a colorless, volatile liquid that has a sweet odor. Iodomethane is primarily used in organic synthesis and as a methylating agent, which means it can add a methyl group to other molecules. In addition to its use in laboratories, iodomethane has applications in agriculture as a soil fumigant to control pests and diseases. However, it is important to handle iodomethane with care, as it is toxic and can pose health risks if inhaled or absorbed through the skin.