7-Naphthalenedisulfonic acid, 3,3-[[4,4-diarsono(1,1-biphenyl)-3,3-diyl]bis(azo)] bis(4,5-di2

7-Naphthalenedisulfonic acid, 3,3-[[4,4-diarsono(1,1-biphenyl)-3,3-diyl]bis(azo)] bis(4,5-di2 · CAS 3861-75-4