n-Pentane

n-Pentane is an organic compound with the formula C5H12—that is, an alkane with five carbon atoms, and are employed as specialty solvents

The term may refer to any of three structural isomers or to a mixture of them; in the IUPAC nomenclature, however, pentane means exclusively the n-pentane isomer, in which case pentanes refers to a mixture of them; the other two are called isopentane (methylbutane) and neopentane (dimethylpropane). Cyclopentane is not an isomer of pentane because it has only 10 hydrogen atoms, whereas pentane has 12.