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18.119.192.110

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From: Webster's Revised Unabridged Dictionary (1913)

 Di·thi·on·ic a.  Chem. Containing two equivalents of sulphur; as, dithionic acid.
 Dithionic acid Chem., an unstable substance, H2S2O6, known only in its solutions, and in certain well-defined salts.