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The title compound crystallizes in monoclinic (space group P21/c) and triclinic (space group Pī) forms from N,N-di­methyl­formamide and isopropyl alcohol solutions, respectively. The planar structures of the mol­ecules in both crystals are essentially the same as each other, with maximum deviations of 0.0969 (11) and 0.209 (4) Å for the monoclinic and triclinic forms, respectively, from the mean planes of all non-H atoms., The title compound, C13H8O3, crystallizes in two polymorphs, namely the monoclinic (space group P21/c) and triclinic (space group Pī) forms, obtained from N,N-di­methyl­formamide and isopropyl alcohol solutions, respectively. The mol­ecular structures and conformations in the two forms are essentially the same as each other. The naphtho­quinone ring systems are essentially planar with r.m.s. deviations of 0.015 and 0.029 Å for the monoclinic and triclinic forms, respectively. The O-propargyl groups are coplanar with the naphtho­quinone units with r.m.s deviations ranging from 0.04 to 0.09 Å. In the monoclinic crystal, mol­ecules are linked via pairs of C—H⋯O hydrogen bonds, forming a tape structure running along [120]. The tapes are further linked by a C—H⋯π inter­action into a layer parallel to the ab plane. Adjacent layers are linked by another C—H⋯π inter­action. In the triclinic crystal, mol­ecules are linked via C—H⋯O and π–π inter­actions, forming a layer parallel to the ab plane. Adjacent layers are linked by a C—H⋯π inter­action.