Ibrahim, S. A. published the artcileColorimetric method for the estimation of antazoline, Application of N-Benzyl-N-((4,5-dihydro-1H-imidazol-2-yl)methyl)aniline hydrochloride, the publication is Indian Journal of Pharmacy (1974), 36(3), 73-5, database is CAplus.
A sensitive colorimetric method was developed for the determination of antazoline-HCl (I) [2508-72-7] in the pure state and in pharmaceutical preparations It depends on estimating the color produced when I was treated with nitrite. Thus, a 20 ml aliquot of I solution (stock solution contains 0.5% I-HCl in water) was treated with 4 ml NaNO2 solution (7.5% in concentrated H2SO4) 5 min at room temperature, and the solution was diluted to 50 ml with 15% aqueous AcONa. Absorbance was read within 10 min at 416 nm against a reagent blank. Data were given on the estimation of I by this method in pharmaceutical formulations. No interference was produced by phenylephrine-HCl [61-76-7], ephedrine-HCl [50-98-6], naphazoline-HCl [550-99-2], chlorobutanol [57-15-8], benzalkonium chloride, or polyethylene glycol [25322-68-3].
Indian Journal of Pharmacy published new progress about 2508-72-7. 2508-72-7 belongs to imidazoles-derivatives, auxiliary class Inhibitor,Immunology/Inflammation,Histamine Receptor, name is N-Benzyl-N-((4,5-dihydro-1H-imidazol-2-yl)methyl)aniline hydrochloride, and the molecular formula is C17H20ClN3, Application of N-Benzyl-N-((4,5-dihydro-1H-imidazol-2-yl)methyl)aniline hydrochloride.
Referemce:
https://en.wikipedia.org/wiki/Imidazole,
Imidazole | C3H4N2 – PubChem