2-Methyl-1-butanol (IUPAC name, also called active amyl alcohol) is an organic chemical compound.
It is one of the components of the aroma of Tuber melanosporum, the black truffle.
It is used as a solvent and an intermediate in the manufacture of other chemicals. 2-Methyl-1-butanol is a component of many mixtures of amyl alcohols sold industrially.
2-Methyl-1-butanol can be derived from fusel oil (because it occurs naturally in fruits such as grapes) or manufactured by either the oxo process or via the halogenation of pentane.