Chemical Name: 4,4'-Dianilino-1,1'-binaphthyl-5,5'-disulfonic Acid Dipotassium Salt
Synonym: 4,4'-Bis(phenylamino)-[1,1'-binaphthalene]-5,5'-disulfonic Acid Potassium Salt; 4,4'-Bis(1-anilinonaphthalene-8-sulfonic Acid) Dipotassium Salt; 8-Anilino-1-naphthalenesulfonic Acid Dimer Dipotassium Salt; bis-ANS;
Smile: O=S(C1=CC=CC2=C(C3=C4C=CC=C(S(=O)([O-])=O)C4=C(NC5=CC=CC=C5)C=C3)C=CC(NC6=CC=CC=C6)=C12)([O-])=O.[K+].[K+]