The paper presents some procedures of the analytical evaluation of a newly prepared substance with beta-adrenolytic activity. The substance was characterised by its melting point, solubility; the experimental partition coefficient, dissociation constant, surface activity were determined. The procedures for identification, purity evaluation and determination of the content of the active principle ( 1 H-NMR, 13 C-NMR, IR, UV spectra, thin-layer chromatography, acidimetric determina- tion in a non-aqueous medium, extraction titration in a heterogeneous medium, extraction-photo- metric determination) were elaborated.

        Key words: N-isopropyl-3-[2-acetyl-4-(propoxycarbonylamino)phenoxy]-2-hydroxypropyl- ammonium chloride – identification – purity detection – content determination