·
Linear Formula CH3OH
·
Molecular Weight 32.04
·
Beilstein Registry
Number 1098229
Detailed d
Methanol is the simplest alcohol, being only a methyl group linked to a hydroxyl group. It is a
light, volatile, colorless, flammable liquid with a
distinctive odor very similar to that of ethanol (drinking alcohol).[11] However, unlike
ethanol, methanol is highly toxic and unfit for consumption. At room
temperature, it is a polar liquid, and is used as an antifreeze, solvent, fuel, and as a denaturant for ethanol. It is also used
for producing biodiesel via transesterification reaction.
Methanol is produced naturally in the anaerobic metabolism of many varieties of
bacteria, and is commonly present in small amounts in the environment. As a
result, the atmosphere contains a small amount of methanol vapor. But in only a
few days, atmospheric methanol is oxidized by sunlight to
produce carbon dioxide and water.
Methanol is also found in abundant quantities in
star forming regions of space, and is used in astronomy as a marker for such
regions. It is detected through its spectral emission lines.[12]
Methanol when drunk is metabolized first to formaldehyde and then to formic acid or formate salts.[13] These are poisonous
to the central nervous system and may result in blindness, coma, and death.
Because of these toxic properties, methanol is frequently used as a denaturant
additive for ethanol manufactured for industrial uses. This addition of
methanol exempts industrial ethanol (commonly known as "denatured alcohol" or
"methylated spirit") from liquor excise taxation in the US and some
other countries.
Applications
Methanol is used primarily as a feedstock for the manufacture
of chemicals, and as a fuel for specialized vehicles. As mentioned
above, it is a common de-naturing agent. As a common laboratory solvent, is
especially useful for HPLC, UV/VIS spectroscopy, and LCMS due to its low UV cutoff.
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