Braun, Aleksander published the artcileQuantitative determination of anionic surfactants by two-phase titration, Category: bromides-buliding-blocks, the publication is Barwniki – Srodki Pomocnicze (1979), 23(1), 16-20, database is CAplus.
The mixed indicators Disulphine Blue VN 150 [129-17-9] and 3,8-diamino-6-phenylphenanthridine methobromide [518-67-2] gave statistically more reliable results in the determination of Na alkylarenesulfonates by acidimetric titration than only 1 indicator, e.g. cetylpyridinium bromide. The historical development of 1- and 2-indicator procedures for surfactant determinations is described. A statistical comparison of the 2 methods is given.
Barwniki – Srodki Pomocnicze published new progress about 518-67-2. 518-67-2 belongs to bromides-buliding-blocks, auxiliary class Other Aromatic Heterocyclic,Salt,Amine,Benzene, name is Dimidium bromide, and the molecular formula is C20H18BrN3, Category: bromides-buliding-blocks.
Referemce:
https://en.wikipedia.org/wiki/Bromide,
bromide – Wiktionary