Term Name:	Ponceau S (acid form)
Synonyms:	3-hydroxy-4-({2-sulfo-4-[(4-sulfophenyl)diazenyl]phenyl}diazenyl)naphthalene-2,7-disulfonic acid, Ponceau S free acid
Definition:	An arenesulfonic acid that is 3-hydroxynaphthalene-2,7-disulfonic acid carrying a {2-sulfo-4-[(4-sulfophenyl)diazenyl]phenyl}diazenyl group at position 4. The tetrasodium salt is the biological stain 'Ponceau S'.
Ontology:	ChEBI [CHEBI:90322] ( EBI )

Relationships

is a type of:	arenesulfonic acid azobenzenes bis(azo) compound naphthols
has_role:	fluorochrome histological dye
inverse is_conjugate_base_of:	Ponceau S(4-)
is_conjugate_acid_of:	Ponceau S(4-)