Objective: To quantify the secondary metabolites present in the leaves and bark of Calliandra angustifolia using spectrophotometric methods. Methodology: Leaves and bark of C. angustifolia were collected in Quistococha (3°49’7” S, 73°19’53” O) and were certified by the curator of the Amazonian Herbarium at UNAP. The samples were cut and dried at 40 °C for one week. Subsequently, they were ground into a fine powder, which was stored in amber jars. UV/Vis techniques were used for the quantification of total phenols, flavonoids, anthocyanins, and catechins. Alkaloids were analyzed with methanol using a Soxhlet extractor and bromocresol green. Saponins were measured using the Lieberman-Burchard reagent at 528 nm. Results: The bark of C. angustifolia had higher amounts of total phenols (23,900.07 mg/100 g) and flavonoids (19,281 mg/100 g) than the leaves (22,474.45 mg/100 g and 16,...