CAS Number: 74-88-4. A colorless, nonflammable liquid that has
has a pungent odor. It is used as an intermediate in the
manufacture of pharmaceuticals and pesticides. Chemical formula =
CH3I. Molecular weight = 141.95 g/mol.
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Methyl iodide is used as an intermediate in the manufacture of
some pharmaceuticals and pesticides, in methylation processes,
and in the field of microscopy. In humans, acute (short-term)
exposure to methyl iodide by inhalation may depress the central
nervous system (CNS), irritate the lungs and skin, and affect the
kidneys. Massive acute inhalation exposure to methyl iodide has
led to pulmonary edema. Acute inhalation exposure of humans to
methyl iodide has resulted in nausea, vomiting, vertigo, ataxia,
slurred speech, drowsiness, skin blistering, and eye irritation.
Chronic (long-term) exposure of humans to methyl iodide by
inhalation may affect the CNS and cause skin burns. EPA has not
classified methyl iodide for potential carcinogenicity.