1-Butanol, also known as butan-1-ol or n-butanol, is a primary alcohol with the chemical formula C4H9OH and a linear structure. Isomers of 1-butanol are isobutanol, butan-2-ol and tert-butanol. The unmodified term butanol usually refers to the straight chain isomer. 1-Butanol occurs naturally as a minor product of the ethanol fermentation of sugars and other saccharides[6] and is present in many foods and drinks.[7][8] It is also a permitted artificial flavorant in the United States, [9] used in butter, cream, fruit, rum, whiskey, ice cream and ices, candy, baked goods, and cordials.[10] It is also used in a wide range of consumer products.[7] The largest use of 1-butanol is as an industrial intermediate, particularly for the manufacture of butyl acetate (itself an artificial flavorant and industrial solvent). It is a petrochemical derived from propylene. Estimated production figures for 1997 are: United States 784, 000 tonnes; Western Europe 575, 000 tonnes; Japan 225, 000 tonnes.[8]