Synonyms: 2,2’-(1,2-ethenediyl)bis[5-[(4-amino-1-naphthalenyl)azo]-benzenesulfonicaci;4,4'-BIS(4-AMINO-1-NAPHTHYLAZO)-2,2'-STILBENEDISULFONIC ACID;4,4'-BIS(4-AMINO-1-NAPHTHYLAZO)-2,2'-STILBENESULFONIC ACID;BANASS;HESSIAN BORDEAUX;4,4'-bis[(4-amino-1-naphthyl)azo]stilbene-2,2'-disulphonic acid;Benzenesulfonic acid, 2,2'-(1,2-ethenediyl)bis[ 5-[(4-amino-1-naphthalenyl)azo]-;4,4'-Bis(4-amino-1-naphthylazo)-2,2'-stilbenesulfonic Acid [Indicator for Organic Acid Anhydrides by morpholine method]