Bromomethane
Organobromine chemical compound / From Wikipedia, the free encyclopedia
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.
Quick Facts Names, Identifiers ...
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Names | |||
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Preferred IUPAC name
Bromomethane[1] | |||
Identifiers | |||
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3D model (JSmol) |
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1209223 | |||
ChEBI | |||
ChEMBL | |||
ChemSpider |
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ECHA InfoCard | 100.000.740 | ||
EC Number |
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916 | |||
KEGG |
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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: | |||
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) |
300 ppm (guinea pig, 9 hr)[4] | ||
NIOSH (US health exposure limits): | |||
PEL (Permissible) |
C 20 ppm (80 mg/m3) [skin][3] | ||
REL (Recommended) |
Ca[3] | ||
IDLH (Immediate danger) |
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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