Ethylene glycol monomethyl ether
|Molar mass||76.09 g/mol|
|Melting point||−85 °C (−121 °F; 188 K)|
|Boiling point||124 to 125 °C (255 to 257 °F; 397 to 398 K)|
|Vapor pressure||6 mmHg (20°C)|
|Flash point||39 °C (102 °F; 312 K)|
LD50 (Median lethal dose)
|1480 ppm (mouse, 7 hr)|
|US health exposure limits (NIOSH):|
|TWA 25 ppm (80 mg/m3) [skin]|
|TWA 0.1 ppm (0.3 mg/m3) [skin]|
IDLH (Immediate danger)
Except where noted otherwise, data is given for materials in their standard state (at 25 °C (77 °F), 100 kPa)
|what is: / ?)(|
2-Methoxyethanol, or methyl cellosolve, is an organic compound with formula C
2 that is used mainly as a solvent. It is a clear, colorless liquid with an ether-like odor. It is in a class of solvents known as glycol ethers which are notable for their ability to dissolve a variety of different types of chemical compounds and for their miscibility with water and other solvents. It can be formed by the nucleophilic attack of methanol on protonated oxirane followed by proton transfer:
3OH → C
2 + H+
2-Methoxyethanol is used as a solvent for many different purposes such as varnishes, dyes, and resins. It is also used as an additive in airplane deicing solutions. In organometallic chemistry it is commonly used for the synthesis of Vaska's complex and related compounds such as ruthenium hydridechlorocarbonyl tristriphenylphosphine. During these reactions the alcohol acts as a source of hydride and carbon monoxide.
The methoxyethanol is converted by alcohol dehydrogenase into methoxyacetic acid which is the substance which causes the harmful effects. Both ethanol and acetate have a protecting effect. The methoxyacetate can enter the Krebs cycle where it forms methoxycitrate.
- "NIOSH Pocket Guide to Chemical Hazards #0401". National Institute for Occupational Safety and Health (NIOSH).
- "Methyl cellosolve". Immediately Dangerous to Life and Health. National Institute for Occupational Safety and Health (NIOSH).
- Occupational exposure guidelines
- F. Welsch, Toxicology Letters, 2005, volume 156, pages 13-28