4,10-7H-Benzo(a)phenazinedisulfonic acid, 9-amino-7-phenyl-5-phenylimino-, (C15-C23)alkylamine salt (1:2) 68155-28-2 Amines, C15-23-sec-alkyl, compds. with 9-amino-7-phenyl-5-(phenylamino)-4,10-disulfobenzo(a)phenazinium hydroxide inner salt (2:1)