10116-15-1 2,7-Naphthalenedisulfonic acid, 5-(acetylamino)-4-hydroxy-3-((2-methoxy-5-((2-(sulfooxy)ethyl)sulfonyl)phenyl)azo)- 5-(Acetylamino)-4-hydroxy-3-((2-methoxy-5-((2-(sulphooxy)ethyl)sulphonyl)phenyl)azo)naphthalene-2,7-disulphonic acid EINECS 233-319-0