3767193 -OEChem-02060822572D 0 0 0 0 0 0 0 0 0999 V2000 M END > 3767193 > 2 > ChemIDplus > 072845319 > 2-Naphthalenesulfonic acid, 7,7'-(carbonyldiimino)bis(4-hydroxy-3-((4-sulfo-1-naphthalenyl)azo)-, tetrasodium salt 72845-31-9 > 72845-31-9 > 072845319 > http://chem.sis.nlm.nih.gov/chemidplus/ > http://chem.sis.nlm.nih.gov/chemidplus/direct.jsp?result=advanced®no=072845319 $$$$