Term Name:	NSC 56820(2-)
Synonyms:	2-amino-3-methyl-5-({4-[(4-sulfonatophenyl)amino]phenyl}{4-[(4-sulfonatophenyl)iminio]cyclohexa-2,5-dien-1-ylidene}methyl)benzenesulfonate, water blue (acid form)(2-)
Definition:	An arenesulfonate oxoanion that is a dianion resulting from the removal of a proton from all three sulfonic acid groups of NSC 56820 and the protonation of its imino nitrogen. The disodium salt is the biological stain C.I. Acid Blue 22, also known as water blue.
Ontology:	ChEBI [CHEBI:86250]  ( EBI )