70209-88-0

BENZOIC ACID 5-[[4-[[6-[[2-[(2-CARBOXYPHENYL)AZO]-1,3-DIOXOBUTYL]AMINO]-2-HYDROXY-4-SULFO-1-NAPHTHALENYL]AZO]-3-METHOXY-7-SULFO-1-NAPHTHALENYL]AZO]-2-HYDROXY-,TETRASODIUM SALT