Home Categories Organic Chemistry Bromomethane
A4710831

Bromomethane , 1000μg/mlinMethanol , 74-83-9

Synonym(s):
Methyl bromide

CAS NO.:74-83-9

Empirical Formula: CH3Br

Molecular Weight: 94.94

MDL number: MFCD00000166

EINECS: 200-813-2

Update time: 2022-07-08

PRODUCT Properties

Melting point: −94 °C(lit.)
Boiling point: 4 °C(lit.)
Density  1.7 g/cm3
vapor density  3.3 (20 °C, vs air)
vapor pressure  1420 mm Hg ( 20 °C)
refractive index  1.4432
Flash point: -34 °C
storage temp.  2-8°C
solubility  water: soluble
form  Colorless gas
explosive limit ~16%
Water Solubility  1.522 g/100 mL
Merck  13,6056
Henry's Law Constant 0.72 at 21 °C (Gan and Yates, 1996)
Exposure limits NIOSH REL: IDLH 250 ppm; OSHA PEL: C 20 ppm; ACGIH TLV: TWA 5 ppm.
Dielectric constant 9.8(0℃)
Stability: Stable. Incompatible with oxidizing agents, strong acids. This is an ozone-depleting chemical, and its use is restricted in many countries.
LogP 1.190
CAS DataBase Reference 74-83-9(CAS DataBase Reference)
IARC 3 (Vol. 41, Sup 7, 71) 1999
NIST Chemistry Reference Methyl bromide(74-83-9)
EPA Substance Registry System Methyl bromide (74-83-9)

Description and Uses

Methyl bromide is a colorless liquid or gas with practically no odor. It is a poisonous gas at room temperature and atmospheric pressure. At high concentrations, it has a chloroform-like odor. Detection of lower concentrations is often facilitated by a warning odorant, chloropicrin, which is added by the manufacturer.
Methyl bromide is flammable only in the range of 10 percent to 16 percent by volume in air. Its physical properties do not meet the definition of a flammable gas as defined by DOT and TC. The onset of thermal decomposition occurs at approximately 752°F (400°C).

Methyl bromide is used as a fumigant forpest control, for degreasing wool, and as a methylating agent. Its use as a refrigerant andin fire extinguishers is restrained because ofits health hazards.

Safety

Symbol(GHS) 
GHS06,GHS08,GHS09,GHS02,GHS07
Signal word  Danger
Hazard statements  H225-H301+H311+H331-H370-H302+H332-H315-H319-H335-H336-H341-H373-H400-H420-H280-H301+H331
Precautionary statements  P210-P280-P302+P352+P312-P304+P340+P312-P370+P378-P403+P235-P261-P273-P281-P305+P351+P338-P301+P310-P311
Hazard Codes  T,N,Xn,F,F+
Risk Statements  23/25-36/37/38-48/20-50-59-68-38-20/22-11-67-66-19-12-39/23/24/25-23/24/25
Safety Statements  15-27-36/39-38-45-59-61-36/37-26-24-16-7
RIDADR  UN 1062 2.3
WGK Germany  3
RTECS  PA4900000
DOT Classification 2.3, Hazard Zone C (Gas poisonous by inhalation)
HazardClass  2.3
HS Code  29033990
Hazardous Substances Data 74-83-9(Hazardous Substances Data)
Toxicity LC for rats in air (6 hrs): 514 ppm (Irish)
IDLA 250 ppm

RELATED PRODUCTS