euthiochroic

Eu`thi*o*chro"ic, a. Etym: [Gr. (Chem.) Defn: Pertaining to, or denoting, an acid so called. Euthiochroic acid (Chem.), a complex derivative of hydroquinone and sulphonic (thionic) acid. -- so called because it contains sulphur, and forms brilliantly colored (yellow) salts.

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