Anghel, D. F. published the artcileAnionic surfactant analysis from micellar solutions, Recommanded Product: Dimidium bromide, the publication is Revue Roumaine de Chimie (1978), 23(2), 251-3, database is CAplus.
The content of Na alkylarenesulfonate or petroleum sulfonate in micellar solutions used for petroleum recovery was determined by the 2-phase titration method using methylene blue [61-73-4], bromcresol green [76-60-8], or dimidium bromide [518-67-2]-Disulphine Blue VN [129-17-9] mixture as the indicator. The last 2 indicators gave the most accurate determinations, but the bromcresol green method gave high values when the hydrocarbon of the micellar solution contained fatty acids. The presence of crude oil caused difficulties in end-point determination Nonionic surfactants and alcs. did not interfere.
Revue Roumaine de Chimie 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, Recommanded Product: Dimidium bromide.
Referemce:
https://en.wikipedia.org/wiki/Bromide,
bromide – Wiktionary