Both independent molecules in the asymmetric unit of the title compound, C11H10O4, are almost planar (r.m.s.deviations = 0.
011 and 0.033 Å).In both molecules, the hydroxy Suspension Kit group is intramolecularly hydrogen bonded to the Footies ketonic O atom.The independent molecules are stacked alternately along the a axis, with the centroids of their chromene ring separated by distances of 4.
490 (1) and 3.621 (1) Å.