Phytochemical, proximate, antioxidant and free radical scavenging evaluations of Calliandria surinamensis.

The flower pigment of Calliandria surinamensis is used folklorically as a colorant and a dye. The crude powdered sample and methanolic extract of the plant were subjected to phytochemical, proximate analy- sis and antioxidant activities. Parameters like moisture content, ash values and extractive values were deter- mined. The methanolic extract was evaluated for its antioxidant/ free radical scavenging activities using stan- dard experimental procedures. The result of the study indicated the presence of copious amount of phenolics and anthocyanidins. The antioxidant activity of Calliandria surinamensis showed a significant free radical activity. Its action was comparable to standard antioxidants like gallic acid and tocopherol (vitamin E). The proximate analysis gave 3.40 ± 0.02 g, 4.15 ± 0.01 g, 1.38 ± 0.13 g and 5.20 ± 0.03 g as moisture content, ash value, acid insoluble ash and alcohol extractives, respectively. This study gives scientific justification of the plant as antioxidant and free radical scavenger.