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Related to dithionic acid: dithionous acid
dithionic acid[¦dī‚thī′än·ik ′as·əd]
H2S2O6 A strong acid formed by the oxidation of sulfurous acid, and known only by its salts and in solution.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.