Zerbe, Jerzy published the artcileA fast manual method for determination of anionic surfactants in water samples, Product Details of C20H18BrN3, the publication is Chemia Analityczna (Warsaw) (2000), 45(4), 595-599, database is CAplus.
Results of investigation on the determination of anionic surfactants (AS) in water samples by means of color reaction based on the reaction of AS with mixed indicator dimidium bromide-disulfine blue and spectrophotometric measurements of the absorbance at 525 nm are presented. In properly selected anal. conditions limits of AS detection in the procedure is 0.07 mg l-1. This enables the use of the method in monitoring or quality control of the natural and drinking water.
Chemia Analityczna (Warsaw) 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 C13H15NO6S, Product Details of C20H18BrN3.
Referemce:
https://en.wikipedia.org/wiki/Bromide,
bromide – Wiktionary