1-Butanol is a four carbon linear hydrocarbon that has a hydroxy group at position 1. 1-Butanol, which is also known as n-butanol or 1-butanol or butyl alcohol (sometimes also called biobutanol when produced biologically), is an alcohol with a 4 carbon structure and the molecular formula of C4H10O. It is primarily used as a solvent, as an intermediate in chemical synthesis, and as a fuel. There are four isomeric structures for butanol. The straight chain isomer with the alcohol at an internal carbon is sec-butanol or 2-butanol. The branched isomer with the alcohol at a terminal carbon is isobutanol, and the branched isomer with the alcohol at the internal carbon is tert-butanol. 1-Butanol is produced in small amounts by gut microbial fermenetation through the butanoate metabolic pathway. N-BUTYL ALCOHOL is a colorless liquid. Used in organic chemical synthesis, plasticizers, detergents, etc.