Isobutanol

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Structural formula of isobutanol

Isobutanol, also known as 2-methyl-1-propanol, is a primary alcohol with the chemical formula (CH_)_CHCH_OH. It is one of the four isomers of butanol, the others being n-butanol, sec-butanol, and tert-butanol. Isobutanol is a colorless, flammable liquid with a characteristic odor and is used in a variety of industrial applications.

Chemical Properties

Isobutanol is a branched-chain alcohol and is classified as a primary alcohol due to the presence of the hydroxyl group (-OH) attached to a primary carbon atom. It has a boiling point of approximately 108 °C and a melting point of -108 °C. Isobutanol is moderately soluble in water and miscible with most organic solvents.

Production

Isobutanol can be produced through several methods, including the fermentation of carbohydrates by certain strains of bacteria and yeast. Industrially, it is often produced by the hydroformylation of propylene to form isobutyraldehyde, which is then hydrogenated to yield isobutanol.

Applications

Isobutanol is used as a solvent in the production of varnishes, coatings, and inks. It is also employed as a chemical intermediate in the synthesis of various esters, which are used in the manufacture of plasticizers, flavors, and fragrances. Additionally, isobutanol is used as a fuel additive to improve the octane rating of gasoline.

Safety and Environmental Impact

Isobutanol is classified as a flammable liquid and should be handled with care to prevent fire and explosion hazards. It can cause irritation to the skin, eyes, and respiratory tract upon exposure. In the environment, isobutanol is readily biodegradable and has a low potential for bioaccumulation.

Related Pages

• Butanol
• Alcohol (chemistry)
• Solvent
• Fuel additive