1-Naphthalenesulfonic acid, 4-amino-5-hydroxy- 4-AMINO-5-HYDROXY-1-NAPHTHALENE SULFONIC ACID 4-Amino-5-hydroxy-1-naphthalenesulfonic acid 83-64-7 Aminonaphtholsulfonic acid S Chicago acid S Kyselina 1-amino-8-naftol-4-sulfonova Kyselina S NSC178276 S Acid WLN: L66J BSWQ EZ GQ