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General |
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| Name | Methanol | |
| Chemical formula | C H3 OH | |
| Formula weight | 32.04 amu | |
| Synonyms | Methyl alcohol, wood alcohol, carbinol. | |
| CAS number | 67-56-1 | |
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Phase behavior |
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| Melting point | 176 K (-97 °C) | |
| Boiling point | 337.8 K (64.7°C) | |
| Triple point | 175.5 K (-97.7°C) ? bar |
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| Critical point | 513 K (240°C) 78.5 bar |
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| ΔvapH | 37.4 kJ/mol | |
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Liquid properties |
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| ΔfH0liquidThe standard enthalpy of formation of a compound is the change of enthalpy that accompanies the formation of 1 mole of that substance from its component elements, at their standard states (the most stable form of the element or compound at 25 degrees Cels | -238.4 kJThe joule (symbol J also called newton metre or coulomb volt is the SI unit of energy and work. The unit is pronounced to rhyme with "tool", and is named in honour of the physicist James Prescott Joule (1818-1889). 1 joule 1 N · 1 m 1 newton · 1 metre 1 k/ molThe mole (symbol: mol) is one of the seven SI base units and is commonly used in chemistry. It measures the amount of substance of a system and is defined as the amount of substance that contains as many elementary entities as there are atoms in exactly 0 | |
| S0liquidIn chemistry, the standard molar entropy is the entropy content of one mole of substance, under conditions of standard temperature and pressure. By comparing the entropies of products and reactants in a chemical reaction, we can determine whether the reac | 127.2 J/mol·K | |
| CpHeat capacity (abbreviated C or just C also called thermal capacity is the ability of matter to store heat. The heat capacity of a certain amount of matter is the quantity of heat (measured in Joules) required to raise its temperature by one kelvin. The S | 79.5 J/mol·K | |
| DensityFor other meanings of density, see density (disambiguation Density (symbol: rho Greek: rho) is a measure of mass per unit of volume. The higher an object's density, the higher its mass per volume. The average density of an object equals its total mass div | 0.7918 ×103 kgThe kilogram (symbol: kg is the SI base unit of mass. A gram is defined as one thousandth of a kilogram. Conversion of units describes equivalent units of mass in other systems. Multiples SI prefixes are used to name multiples and subdivisions of the kilo/ mFor other uses of "metre" and "meter", see Metre (disambiguation). The metre is the basic unit of length in the International System of Units (SI: Systeme International d'Unites). It is defined as the length of the path travelled by light in absolute vacu3 | |
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Gas properties |
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| ΔfH0gas | -201 kJ/mol | |
| S0gas | ? J/mol·K | |
| Cp | 44.06 J/mol·K | |
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Safety | ||
| Acute effects | Poisonous by ingestion or inhalation, may cause respiratory failure, kidney failure, blindness. | |
| Chronic effects | As acute. Skin contact can cause dermatitis. | |
| Flash point | 11°C | |
| Autoignition temperature | 455°C | |
| Explosive limits | 7-36% | |
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More info | ||
| Properties | NIST WebBook | |
| MSDS | Hazardous Chemical Database | |
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SI units were used where possible. Unless otherwise stated, standard conditions were used. Disclaimer and references
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Methanol, also known as methyl alcohol or wood alcohol, is a chemical compound with chemical formula C H3 OH. It is the simplest alcohol, and is a light, volatile, colourless, flammable, poisonous liquid that is used as an antifreeze, solvent, fuel, and as a denaturant for ethyl alcohol. The chemical structure is:
H | H-C-OH | HMethanol burns in air forming carbon dioxide and water:
A methanol flame is almost colorless. Care should be exercised around burning methanol to avoid burning oneself on the almost invisible fire.
Methanol is produced naturally in the anaerobic metabolism of many varieties of bacteria. As a result, there is a small fraction of methanol vapor in the atmosphere. Over the course of several days, atmospheric methanol is oxidized by oxygen and sunlight to carbon dioxide.
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