2,7-Naphthalenedisulfonic acid, 3,3'-(azoxybis((2-methoxy-4,1-phenylene)azo))bis(4,5-dihydroxy-, lithium sodium salt 3,3'-(Azoxybis((2-methoxy-p-phenylene)azo))bis(4,5-dihydroxynaphthalene-2,7-disulphonic) acid, lithium sodium salt 85136-25-0 EINECS 285-749-3