tetrasodium 3-[[8-[(4-amino-6-chloro-1,3,5-triazin-2-yl)amino]-1-hydroxy-3,6-disulphonato-2-naphthyl]azo]-4-hydroxynaphthalene-1,5-disulphonate

3-[[8-[(4-Amino-6-chloro-1,3,5-triazin-2-yl)amino]-1-hydroxy-3,6-disulfonaphthalen-2-yl]azo]-4-hydroxy-1,5-naphthalenedisulfonic acid tetrasodium salt