Iodomethane

Iodomethane
Stereo skeletal formula of iodomethane with all explicit hydrogens added
Ball and stick model of iodomethane
Ball and stick model of iodomethane
Spacefill model of iodomethane
Spacefill model of iodomethane
Names
Preferred IUPAC name
Iodomethane[1]
Other names
  • Methyl iodide[1]
  • Methyl iodine
  • Monoiodomethane
Identifiers
3D model (JSmol)
Abbreviations
  • Halon 10001
  • MeI
969135
ChEBI
ChEMBL
ChemSpider
ECHA InfoCard 100.000.745 Edit this at Wikidata
EC Number
  • 200-819-5
1233
KEGG
MeSH methyl+iodide
RTECS number
  • PA9450000
UNII
UN number 2644
  • InChI=1S/CH3I/c1-2/h1H3 checkY
    Key: INQOMBQAUSQDDS-UHFFFAOYSA-N checkY
  • CI
Properties
CH3I
Molar mass 141.939 g·mol−1
Appearance Colorless liquid
Odor Pungent, ether-like[2]
Density 2.28 g·mL−1
Melting point −66.5 °C; −87.6 °F; 206.7 K
Boiling point 42.4 to 42.8 °C; 108.2 to 108.9 °F; 315.5 to 315.9 K
14 g·L−1 (at 20 °C, 68 °F)[3]
log P 1.609
Vapor pressure 54.4 kPa (at 20 °C, 68 °F)
1.4 μmol·Pa−1·kg−1
−57.2·10−6 cm3·mol−1
1.530–1.531
Structure
Tetrahedron
Thermochemistry
82.75 J·K−1·mol−1
−14.1 – −13.1 kJ·mol−1
−808.9 – −808.3 kJ·mol−1
Hazards
GHS labelling:
GHS06: Toxic GHS08: Health hazard
Danger
H301, H312, H315, H331, H335, H351
P261, P280, P301+P310, P311
NFPA 704 (fire diamond)
NFPA 704 four-colored diamondHealth 3: Short exposure could cause serious temporary or residual injury. E.g. chlorine gasFlammability 0: Will not burn. E.g. waterInstability 0: Normally stable, even under fire exposure conditions, and is not reactive with water. E.g. liquid nitrogenSpecial hazards (white): no code
3
0
0
Lethal dose or concentration (LD, LC):
  • 76 mg·kg−1 (oral, rat)[3]
  • 800 mg·kg−1 (dermal, guinea pig)
  • 1550 ppm (rat, 30 min)
  • 860 ppm (mouse, 57 min)
  • 220 ppm (rat, 4 hr)[4]
3800 ppm (rat, 15 min)[4]
NIOSH (US health exposure limits):
PEL (Permissible)
 TWA 5 ppm (28 mg/m3) [skin][2]
REL (Recommended)
 Ca TWA 2 ppm (10 mg/m3) [skin][2]
IDLH (Immediate danger)
 Ca [100 ppm][2]
Related compounds
Related iodomethanes
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Iodomethane, also called methyl iodide, and commonly abbreviated "MeI", is the chemical compound with the formula CH3I. It is a dense, colorless, volatile liquid. In terms of chemical structure, it is related to methane by replacement of one hydrogen atom by an atom of iodine. It is naturally emitted in small amounts by rice plantations.[5] It is also produced in vast quantities estimated to be greater than 214,000 tons annually by algae and kelp in the world's temperate oceans, and in lesser amounts on land by terrestrial fungi and bacteria. It is used in organic synthesis as a source of methyl groups.

  1. ^ a b "Front Matter". Nomenclature of Organic Chemistry : IUPAC Recommendations and Preferred Names 2013 (Blue Book). Cambridge: The Royal Society of Chemistry. 2014. p. 657. doi:10.1039/9781849733069-FP001. ISBN 978-0-85404-182-4.
  2. ^ a b c d NIOSH Pocket Guide to Chemical Hazards. "#0420". National Institute for Occupational Safety and Health (NIOSH).
  3. ^ a b Record in the GESTIS Substance Database of the Institute for Occupational Safety and Health
  4. ^ a b "Methyl iodide". Immediately Dangerous to Life or Health Concentrations (IDLH). National Institute for Occupational Safety and Health (NIOSH).
  5. ^ K. R. Redeker; N.-Y. Wang; J. C. Low; A. McMillan; S. C. Tyler & R. J. Cicerone (2000). "Emissions of Methyl Halides and Methane from Rice Paddies". Science. 290 (5493): 966–969. Bibcode:2000Sci...290..966R. doi:10.1126/science.290.5493.966. PMID 11062125. S2CID 2830653.