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Methanol

CAS No.: 67-56-1
Synonyms:
Formula: CH4O
Exact Mass: 32.02620
Molecular Weight: 32.04190
PSA: 20.23000
LogP: -0.39150
Description Feedback
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.

Properties Feedback
Appearance & Physical State:Clear, colorless liquid
Density:0.7918 g/cm3
Melting Point:-98 ºC
Boiling Point:64.7 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 Feedback
Symbol:
GHS02

GHS06

GHS08
Sign:Danger
hazard declaration:H225; H301 + H311 + H331; H370
hazard declaration add:
waring notice:P210; P280; P302 + P352 + P312; P304 + P340 + P312; P370 + P378; P403 + P235
RTECS:PC1400000
Hazard Class:3
Safety Statements:S16-S36/37-S45-S7
HS Code:2905110000
Packing Group:II
WGK Germany:1
RIDADR:UN 1230
Risk Statements:R11; R23/24/25; R39/23/24/25
Hazard Codes:F

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