Synonyms: 1,5-Naphthalenedisulfonicacid, 2(or 3)-[[8-amino-7-[[5-[[4-[4-[2-[[4-[[3-[[1-amino-7-[[1,5(or4,8)-disulfo-2-naphthalenyl]azo]-8-hydroxy-3,6-disulfo-2-naphthalenyl]azo]-4-sulfophenyl]amino]-6-chloro-1,3,5-triazin-2-yl]amino]ethyl]-1-piperazinyl]-6-chloro-1,3,5-triazin-2-yl]amino]-2-sulfophenyl]azo]-1-hydroxy-3,6-disulfo-2-naphthalenyl]azo]-,sodium salt (9CI)