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n-Butanol or n-Butyl Alcohol is a primary alcohol with a 4-carbon structure, manufactured from propylene. Butanol is one of the group of 'fusel alcohols', which have more than two carbon atoms and have significant solubility in water. n-Butanol occurs naturally as a minor product of the fermentation of sugars and carbohydrates, and is present in many foods and beverages. The largest use of n-Butanol is as an industrial intermediate, particularly for the manufacture of butyl acetate, though it is also used in butter, cream, fruit, rum, whiskey, ice cream and ices, candy, baked goods, cordials and a wide range of consumer products.

n-Butanol has three isomers: isobutanol, 2-butanol and tert-butanol

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