§ 721.5279 - 2,7-Naphthalenedisulfonic acid, 4-amino-3-[[4'2-amino-4-[(3-butoxy-2-hydroxypropyl)amino]phebyl]azo]-3,3'-dimethyl[1,1'-biphenyl]-4-yl]azo]-5-hydroxy-6-(phenylazo)-, disodium salt.  


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