euthiochroic

euthiochroic is an   Adverb

Definition:

[1] 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.

Synonyms: