170020-61-8 (TETRASODIUM SALT) 2,7-Naphthalenedisulfonic acid, 5-[(2,3-dichlorobenzoyl)amino]-3-[[4-[[8-[(2,4-dichlorobenzoyl)amino]-1-hydroxy-3,6-disulfo-2-naphthalenyl]azo]phenyl]azo]-4-hydroxy- AIDS-061016 AIDS061016 FP-21399 (*Tetrasodium salt*)