2,7-Naphthalenedisulfonicacid, 4,5,5'-trihydroxy-3,4'-azobis[[6-(2-arsonophenyl)azo]- (9CI);2,7-Naphthalenedisulfonic acid,4,5,5'-trihydroxy-3,4'-azobis[[6-(o-arsonophenyl)azo]- (8CI); Arsenazo IV
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