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Names | |||
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Preferred IUPAC name
Bromomethane[1] | |||
Identifiers | |||
3D model (JSmol)
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1209223 | |||
ChEBI | |||
ChEMBL | |||
ChemSpider | |||
ECHA InfoCard | 100.000.740 | ||
EC Number |
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916 | |||
KEGG | |||
MeSH | methyl+bromide | ||
PubChem CID
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RTECS number |
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UNII | |||
UN number | 1062 | ||
CompTox Dashboard (EPA)
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Properties | |||
CH3Br | |||
Molar mass | 94.939 g·mol−1 | ||
Appearance | Colorless gas[2] | ||
Odor | Chloroform-like | ||
Density | 3.97 kg/m3 (gas, 0 °C)[2] 1.72 g/mL (liquid, 4 °C)[2] | ||
Melting point | −93.66 °C (−136.59 °F; 179.49 K)[2] | ||
Boiling point | 4.0 °C (39.2 °F; 277.1 K)[2] | ||
17.5 gL−1[2] | |||
log P | 1.3 | ||
Vapor pressure | 190 kPa (at 20 °C, 68 °F) | ||
−42.8·10−6 cm3·mol−1 | |||
Thermochemistry | |||
Std enthalpy of
formation (ΔfH⦵298) |
−35.1 – −33.5 kJ·mol−1 | ||
Hazards | |||
GHS labelling: | |||
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Danger | |||
H301, H315, H319, H331, H335, H341, H373, H400, H420 | |||
P201, P202, P260, P261, P264, P270, P271, P273, P280, P281, P301+P310, P302+P352, P304+P340, P305+P351+P338, P308+P313, P311, P312, P314, P321, P330, P332+P313, P337+P313, P362, P391, P403+P233, P405, P501, P502 | |||
NFPA 704 (fire diamond) | |||
Flash point | 194 °C (381 °F; 467 K)[2] | ||
535 °C (995 °F; 808 K)[2] | |||
Explosive limits | 10-16%[3] | ||
Lethal dose or concentration (LD, LC): | |||
LC50 (median concentration)
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LCLo (lowest published)
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300 ppm (guinea pig, 9 hr)[4] | ||
NIOSH (US health exposure limits): | |||
PEL (Permissible)
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C 20 ppm (80 mg/m3) [skin][3] | ||
REL (Recommended)
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Ca[3] | ||
IDLH (Immediate danger)
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Ca [250 ppm][3] | ||
Related compounds | |||
Related alkanes
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Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Bromomethane, commonly known as methyl bromide, is an organobromine compound with formula CH3Br. This colorless, odorless, nonflammable gas is produced both industrially and biologically. It is a recognized ozone-depleting chemical. It was used extensively as a pesticide until being phased out by most countries in the early 2000s.[5] From a chemistry perspective, it is one of the halomethanes.