1831 T. Thomson (ed. 7) II. 110 Pyrokinic acid crystallizes in tufts composed of diverging needles.
1891 H. E. Roscoe & C. Schorlemmer (ed. 2) III. iii. 165 Caventou and Pelletier obtained a crystalline body, which they..named pyroquinic acid. Wöhler, however, gave it the name of hydroquinone, because it is readily formed by the combination of hydrogen and quinone.