2,7-Naphthalenedisulfonic acid,6-[[4,6-bis[bis(2-hydroxyethyl)amino]-1,3,5-triazin-2-yl]amino]-4-hydroxy-3-[[6-sulfo-4-[(3-sulfophenyl)azo]-1-naphthalenyl]azo]-, tetrasodium salt
CAS No. 103232-42-4