170020-66-3

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-,tetrasodium salt