2,7-Naphthalenedisulfonicacid, 5-amino-3-[(2-arsonophenyl)azo]-4-hydroxy- (9CI);2,7-Naphthalenedisulfonic acid, 5-amino-3-[(o-arsonophenyl)azo]-4-hydroxy-(8CI); Benzenearsonic acid, o-[(8-amino-1-hydroxy-3,6-disulfo-2-naphthyl)azo]-(7CI); Arsenazo H
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