Iodomethane, CAS No. 74-88-4

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74-88-4

Catalog No. EBD2223192

CAS 74-88-4

Name Iodomethane

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Basic Information

Synonyms: Methyliodide CH3I

Molecular Formula: CH3I

Molecular Weight: 141.94

MDL Number: MFCD00001073

Product Description:

Iodomethane is a colorless, dense liquid with a molecular formula of CH_I. It is one of the simplest alkyl iodides, characterized by a highly polar C-I bond that makes it a potent methylating agent. As a primary chemical reagent, iodomethane is widely employed in organic synthesis for introducing a methyl group (methylation) onto oxygen, nitrogen, sulfur, and carbon atoms. It is a key building block in the preparation of pharmaceuticals, agrochemicals, and specialty chemicals, often used in the synthesis of quaternary ammonium salts, methyl esters, and methyl ethers. Due to its high reactivity and volatility, iodomethane is classified as a hazardous substance with significant toxicity and potential carcinogenicity. It is also utilized in analytical chemistry as a derivatization reagent for gas chromatography and in the production of certain photographic chemicals. Proper handling under a fume hood with appropriate personal protective equipment is essential.

Physical Properties

Melting Point: −64(lit.)

Boiling Point: 41-43 °C(lit.)

Flash Point: −18 °F

Density: 4.89 (vs air)

Solubility: 14 g/L (20 °C) in water

Refractivity: n20/D 1.531(lit.)

Storage: 2-8°C

Safety Information

Packing Level: I

Hazard Category: 6.1

Transport Codes: 2644

Analytical Data

Appearance: Clear colourless liquid with acrid odor