Einecs 282-157-7

4-[[4-[(4-amino-1-naphthyl)azo]-1-naphthyl]azo]naphthalene-2,7-disulphonic acid, sodium salt

2,7-Naphthalenedisulfonic acid, 4-[[4-[(4-amino-1-naphthalenyl) azo]-1-naphthalenyl]azo]-, sodium salt