I

Iodomethane

IUPAC: iodomethane

CH3I Organic Compounds CAS 74-88-4
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Quick Reference
Formula / NotationCH3I
CAS Number74-88-4
Molecular Weight141.939
Melting Point-87.6 °F (NTP, 1992)
Boiling Point108.3 °F at 760 mmHg (NTP, 1992)
Density2.279 at 68 °F (USCG, 1999) - Denser than water; will sink
Solubility10 to 50 mg/mL at 64 °F (NTP, 1992)
AppearanceMethyl iodide appears as a colorless liquid that turns brown on exposure to light. Denser than water. Contact may irritate skin, eyes and mucous membranes. Very toxic by ingestion, inhalation and s...
Also Known AsMethyl iodide; 74-88-4; Monoiodomethane; Methane, iodo-; Methyljodid; Jod-methan; Iodometano; Joodmethaan; Methyljodide; Metylu jodek
CategoryOrganic Compounds

What is Iodomethane?

Methyl Iodide can cause cancer according to an independent committee of scientific and health experts.

Formula & Notation

CH3I

IUPAC Name: iodomethane

Other Names / Synonyms: Methyl iodide; 74-88-4; Monoiodomethane; Methane, iodo-; Methyljodid; Jod-methan; Iodometano; Joodmethaan; Methyljodide; Metylu jodek

Properties & Characteristics

Appearance: Methyl iodide appears as a colorless liquid that turns brown on exposure to light. Denser than water. Contact may irritate skin, eyes and mucous membranes. Very toxic by ingestion, inhalation and s.... Molecular formula: CH3I. Molecular weight: 141.939 g/mol. Boiling point: 108.3 °F at 760 mmHg (NTP, 1992). Melting point: -87.6 °F (NTP, 1992). Density: 2.279 at 68 °F (USCG, 1999) - Denser than water; will sink. Solubility: 10 to 50 mg/mL at 64 °F (NTP, 1992). Vapor pressure: 661.76 mmHg (USCG, 1999). LogP: 1.5.

Physical Data

PropertyValue
Melting Point-87.6 °F (NTP, 1992)
Boiling Point108.3 °F at 760 mmHg (NTP, 1992)
Density2.279 at 68 °F (USCG, 1999) - Denser than water; will sink
Molecular Weight141.939
Solubility10 to 50 mg/mL at 64 °F (NTP, 1992)
AppearanceMethyl iodide appears as a colorless liquid that turns brown on exposure to light. Denser than water. Contact may irritate skin, eyes and mucous membranes. Very toxic by ingestion, inhalation and s...

Uses & Applications

Used as an industrial feedstock, solvent, pharmaceutical intermediate, flavoring agent, or chemical building block.

Safety Information

Flammable or irritant. Many organic compounds are flammable liquids or vapours. Keep away from ignition sources. Consult SDS for specific hazard data.

Always consult the SDS/MSDS before handling any chemical. This information is for educational purposes only.

Key Facts

Term Iodomethane
Formula CH3I
CAS Number 74-88-4
Molecular Weight 141.939
Category Organic Compounds
Index All "I" terms
Synonyms Methyl iodide; 74-88-4; Monoiodomethane; Methane, iodo-; Methyljodid; Jod-methan; Iodometano; Joodmethaan; Methyljodide; Metylu jodek

Frequently Asked Questions

Methyl Iodide can cause cancer according to an independent committee of scientific and health experts.

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Editorial standards: Chemical data is sourced from peer-reviewed literature, CAS Registry, NIST WebBook, and PubChem. Safety information reflects guidance from OSHA, ECHA, and IAEA. For educational purposes only — always consult official SDS documentation and qualified professionals before handling chemicals.

AllChemicals.info — The Online Chemical Glossary | https://allchemicals.info/chemical/iodomethane

For educational purposes only. Verify all information before use.