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The content of phenolic compounds and antioxidant capacity in three colors of petals cress (Tropaeolum majus L.) was evaluated. Petals colors red cress, orange and yellow were dried at room temperature; then they were conditioned for extracting its bioactive components, which were quantified showing significant difference (p<0.05) between colors. The highest concentration of total phenols is in the orange color, followed by red and yellow (917.05; 799.35 and 442.02 mg AGE/g sample). For quantification of total flavonoids, the highest content is in the red, followed by orange and yellow (2.184; 1.185 and 0.867 mg QE /g sample). As for the total tannins, the highest content is in the red followed by orange and yellow (342.92; 333.77 and 291.53 mg ATE/g sample). With respect to the antioxidant capacity by DPPH and ABTS methods, the highest content is in the orange color, followed Recibido el 12-10-2015 Aprobado el 04-11-2015 Ketty Arellano Lino, Jaqueline Herrera Rodríguez, Miguel Quispe Solano, Clara Espinoza Silva... 320 Rev Soc Quím Perú. 81(4) 2015 by red and yellow (3928.226; 3286.163 and 2500.887 μM TE/g sample), (622.92; 608.15 and 587.01 μM TE/g sample).

EVALUACIÓN DE LOS COMPUESTOS FENÓLICOS Y CAPACIDAD ANTIOXIDANTE DE TRES COLORES DE PÉTALOS DE MASTUERZO (Tropaeolum majus L.)