Synonyms: | 2,7-Naphthalenedisulfonicacid, 4,5-dihydroxy-3-[(2-hydroxy-3,5-dinitrophenyl)azo]-6-[(3-sulfophenyl)azo]-(9CI); 2,7-Naphthalenedisulfonic acid,4,5-dihydroxy-3-[(2-hydroxy-3,5-dinitrophenyl)azo]-6-[(m-sulfophenyl)azo]-(7CI,8CI); 2-(2-Hydroxy-3,5-dinitrophenylazo)-7-(3-sulfophenylazo)-1,8-dihydroxy-3,6-naphthalenedisulfonic acid; Picramine M |