The excess bromination method or Koppeschaar's method has been used for the analysis of a number of phenols and aromatic amines. A general analytical procedure for this method has been worked out which is applicable, with few modifications, to a great many compounds. Greater care was taken in the purification of the substances to be analyzed than in most of the previous work, thus making possible a more accurate interpretation of the value of the method. Good results were obtained for phenol, o-, m-, and pnitrophenols, 2,4-dinitrophenol, p-chlorophenol, salicylic acid, m-hydroxybenzoic acid, methylsalicylate, acetyls alley lie acid, phenylsalicylate, m- and o-cresols, resorcinol, b-naphthol, thymol, aniline, p-chloroaniline, o- and m-nitroanilines, acetanilide, sulfanilic acid, metanilic acid, anthranilic acid, m-aminobenzoic acid, and o-, m-, and p-toluidines. In all cases with the exception of phenol, p-nitrophenol, o-, m-, and p-cresols, resorcinol, p-nitroaniline, and the toluidines, better results have been obtained than in any previous published work. The method has been extended to include p-chlorophenol, methylsalicylate, phenylsalicylate, acetylsalicylic acid, and pchloroaniline. The excess method, as compared with the direct titration method, is to be preferred when applicable. The direct method is tedious and desirable only when the excess method cannot be used. © 1928, American Chemical Society. All rights reserved.