1-Naphthol, or α-naphthol, is a fluorescent organic compound with the formula C₁₀H₈O . It is a white solid. It is an isomer of 2-naphthol differing by the location of the hydroxyl group on the naphthalene ring.
1-Naphthol is a hydroxyl-aromatic compound.1-naphthol is a naphthol carrying a hydroxy group at position. Its thermodynamic properties such as heat capacity, sublimation pressure, vapor pressure, enthalpies of combustion, formation and fusion have been estimated. The decomposition of 1-naphthol in aqueous solutions on exposure to gamma radiation has been studied.