Methanol

CAS No. 67-56-1

Formula: CH4O
Basic Info

Methanol, also known as methyl alcohol, wood alcohol, wood naphtha, methyl hydrate, or wood spirits, is a chemical with the formula CH3OH (often abbreviated MeOH). Methanol acquired the name "wood alcohol" because it was once produced chiefly as a byproduct of the destructive distillation of wood. Today, industrial methanol is produced in a catalytic process directly from carbon monoxide, carbon dioxide, and hydrogen.
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 burns in oxygen, including open air, forming carbon dioxide and water:
2 CH3OH + 3 O2 → 2 CO2 + 4 H2O
Methanol ingested in large quantities is metabolized first to formaldehyde and then to formic acid[13] or formate salts, which are poisonous to the central nervous system and may cause 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.

Formula
CH4O
Molecular Weight
32.0419
Exact Mass
32.0262
LogP
-0.3915
PSA
20.23
Synonyms

Wood spirit

Methylic alcohol

Wood spirits

Methyl alcohol

Wood alcohol

Columbian spirits

Methyl hydroxide

Pyroligneous spirit

Carbinol

Hydroxymethane

Methyl hydrate

Methylol

Wood naphtha

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Properties
Appearance & Physical State
Clear, colorless liquid
Density
0.7918 g/cm3
Boiling Point
64.7 ºC
Melting Point
-98 ºC
Flash Point
12 ºC
Refractive Index
1.328-1.330
Stability
May decompose on exposure to moist air or water.
Storage Condition
Store at RT.
Vapor Pressure
97.66mmHg (13.02 kPa, 20 °C)
Safety Info
RTECS
PC1400000
Safety Statements
S16-S36/37-S45-S7
WGK Germany
1
Risk Statements
R11; R23/24/25; R39/23/24/25
HS Code
2905110000
RIDADR
UN 1230
Hazard Class
3
Packing Group
II
Caution Statement
P210; P280; P302 + P352 + P312; P304 + P340 + P312; P370 + P378; P403 + P235
Hazard Codes
Spectrum
NMR Spectrum 1H NMR : 90 MHz in CDCl3
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IR Spectrum IR : liquid film
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Mass Spectrum Mass
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Raman Spectrum Raman : 4880 A,200 M,liquid
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ESR Spectrum ESR : REDUCTION WITH TICL3 AND H2O2
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PRODUCTS
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SUPPLIERS
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BRANDING
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