4,10-7H-Benzo(a)phenazinedisulfonic acid, 9-phenylamino-7-phenyl-5-phenylimino-, (C15-C23)alkylamine salt (1:2) 68155-29-3 Amines, C15-23-sec-alkyl, compds. with 7-phenyl-5,9-bis(phenylamino)-4,10-disulfobenzo(a)phenazinium hydroxide inner salt (2:1)