[en] Extraction of indium from H₂SO₄ and KBr solution in the form of bromoindate brilliant green diminishes in the presence of relatively large amounts of such metals being extracted as Fe(3), Tl(3), Zn, Hg(2) and Cd. Gallium has no effect on the extraction of indium. With the use of radioactive isotope sup114m in the influence of the medium acidity, of the concentration of metals and of the nature of organic solvent on the extent of indium extraction inhibition in the presence of macroelements has been studied. The character and extent of inhibition of indium extraction depend on the nature of the macroelement: the better the macroelement can be extracted in the form of an ion association, the stronger it inhibits the extraction of indium. Inhibition of the extraction is explained by dissociation of the ion associations extracted in the organic phase and, as a consequence of this dissociation, by the action of the common ion, vix., the dye cation