|Other names||Isobutyl alcohol, IBA, |
|Molar mass||74.12 g/mol|
|Density and phase||0.802 g/cm³, liquid|
|Solubility in water||Limited miscibility|
|In ethanol, ether
In acetone, toluene
|Melting point||-108 °C (165 K)|
|Boiling point||108 °C (380 K)|
|Viscosity||3.95 centipoise at 20°C|
|Flash point||28 °C|
|R/S statement||R: 10-20-22-36-37-38|
|Supplementary data page|
Solid, liquid, gas
|Spectral data||UV, IR, NMR, MS|
|Related alcohols||Isopropyl alcohol,|
|Other compounds||acetone, propylene,|
|Except where noted otherwise, data are given for|
materials in their standard state (at 25°C, 100 kPa)
Infobox disclaimer and references
Isobutanol (IUPAC nomenclature: 2-methyl-propan-1-ol; also known as 2-methylpropyl alcohol, among other names) is a colorless, flammable, organic compound with a characteristic smell. Its isomers are 1-butanol, 2-butanol and tert-butanol. It is classified as an alcohol and as such it is widely used as a solvent in chemical reactions, as well as being a useful starting material for organic synthesis.
Isobutanol is produced naturally during the fermentation of carbohydrates. It may also be a by-product of the decay process of organic matter.
The main use of isobutanol is as starting material in the manufacture of isobutyl acetate, which is mostly used in the production of lacquer and similar coatings. Isobutyl acetate is also used in the food industry as flavouring agent.
Isobutanol is also used in the industrial synthesis of derivative esters. Isobutyl esters such as diisobutyl phthalate (DIBP) are used as plasticizer agents in plastics, rubbers and other dispersions.
Other applications of isobutanol include its use as a solvent in paint, varnish removers and inks. Its addition in small amounts into paints reduces their viscosity, improves brush flow, and retards the formation of oil residues (known as blush) on painted surfaces.
Minor uses include its inclusion as gasoline additive for spark-ignition engines where it helps to prevent carburettor icing, polishers and cleaners. It is used as chemical extractant in the production of organic compounds, and as mobile phase in thin layer chromatography.
Isobutanol is a volatile, flammable, liquid that should be stored and used in well-ventilated areas. It is moderately irritating to the skin and greatly irritating to the eyes, mucous membranes and respiratory tract. Exposure to high concentrations of its vapour can cause temporary narcosis.
- Health and Safety Guide for Isobutanol. World Health Organisation, 1987. Last accessed October 5, 2005.