Abstract: A method of purifying dinitroaniline of the general formula: ##STR1## in which: R is linear or branched C.sub.1 -C.sub.6 alkyl, C.sub.4 -C.sub.6 cycloalkyl, C.sub.1 -C.sub.4 monohaloalkyl or C.sub.1 -C.sub.4 alkoxy(C.sub.2 -C.sub.4)alkyl,Y is C.sub.1 -C.sub.4 alkyl, halogen or CF.sub.3, andX is hydrogen, halogen, C.sub.1 -C.sub.4 alkyl, C.sub.1 -C.sub.4 alkoxy, C.sub.1 -C.sub.4 monohaloalkyl, or C.sub.1 -C.sub.4 alkoxy(C.sub.1 -C.sub.4)alkyl, by N-denitration of the impurities of N-2,6-dinitroaniline contained therein, in the presence of a base selected from alkali-metal hydroxides, alkali-metal carbonates and ammonium hydroxide, at neutral or basic pH, comprising the treatment, with stirring, of the dinitroaniline to be purified, with an alcoholic organic solvent.