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There are two isomers of 'propanol'. If the isomer is unstated, it is more likely to refer to propan-1-ol.

★ Propan-1-ol (or ''n''-propanol) — CH₃CH₂CH₂OH

★ Propan-2-ol (or isopropyl alcohol, or isopropanol) — (CH₃)₂CHOH
Note that propan'a'l (propionaldehyde), differing in spelling from propanol by a single letter, is a different compound.