Term Name:	thionine
Synonyms:	3,7-diaminophenothiazin-5-ium chloride, C.I. 52000, Cyanine, Katalysin, Lauth's Violet, Lauthsches violett, Thionin
Definition:	An organic chloride salt composed of 3,7-diaminophenothiazin-5-ium and chloride ions in a 1:1 ratio. A strongly metachromatic dye, useful for the staining of acid mucopolysaccharides. It is also a common nuclear stain and can be used for the demonstration of Nissl substance in nerve cells of the CNS.
Ontology:	ChEBI [CHEBI:52295]  ( EBI )