Term Name:	alizarin blue
Synonyms:	5,6-dihydroxynaphtho[2,3-f]quinoline-7,12-dione, alizarin blue R, C.I. 67410
Definition:	An organic heterotetracyclic compound that is naphtho[2,3-f]quinoline-7,12-dione carrying two additional hydroxy groups at positions 5 and 6. Used as an acid-base indicator. Between pH 0.0 and pH 1.6 it changes from pink to yellow, and between pH 6.0 and pH 7.6 it changes from yellow to green.
Ontology:	ChEBI [CHEBI:87355]  ( EBI )