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67692 Sigma-Aldrich

Iodomethane

purum, ≥99.0% (GC)

Synonym: Methyl iodide

  • CAS Number 74-88-4

  • Empirical Formula (Hill Notation) CH3I

  • Molecular Weight 141.94

  •  Beilstein Registry Number 969135

  •  EC Number 200-819-5

  •  MDL number MFCD00001073

  •  PubChem Substance ID 329760660

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Properties

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vapor density   4.89 (vs air)
vapor pressure   24.09 psi ( 55 °C)
  7.89 psi ( 20 °C)
InChI Key   INQOMBQAUSQDDS-UHFFFAOYSA-N
grade   purum
assay   ≥99.0% (GC)
contains   silver wool as stabilizer
impurities   ≤0.5% CH2I2
refractive index   n20/D 1.530
  n20/D 1.531(lit.)
bp   41-43 °C(lit.)
  41-43 °C
mp   −64(lit.)
solubility   water: soluble14 g/L at 20 °C
density   2.28 g/mL at 25 °C(lit.)

Description

Application

Iodomethane (Methyl iodide) may be employed in the preparation of stable neutral solutions of hypoiodous acid and various methyl esters.

General description

Iodomethane (Methyl iodide) is a colorless liquid. It can be prepared by reacting dimethyl sulfate with concentrated KI. Reaction of iodine and phosphorous with methanol has been reported to afford iodomethane. It reacts with tris(triphenylphosphine)chlororhodium(I) to afford the octahedral complex of rhodium(III), [RhlCl(CH3)(PPh3)2(ICH3)]. Kinetics of its reaction with atomic chlorine in the gas phase has been investigated. The absolute rate constant of the reaction has been reported.

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Safety & Documentation

Safety Information

Symbol 
Signal word 
Danger
Hazard statements 
Precautionary statements 
RIDADR 
UN 2644 6.1 / PGI
WGK Germany 
3
Protocols & Articles
Peer-Reviewed Papers
15

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