Iodomethane is a chemical compound. Its chemical formula is CHI. It is also called methyl iodide. It is commonly abbreviated as "MeI". It is a dense, colorless, volatile liquid. It is naturally released by rice plantations in small amounts. It is also made in large quantities by algae and kelp in the world's temperate oceans. It is made in small amounts on land by fungi and bacteria. It is used in organic synthesis as a source of methyl groups.