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

The flower pigment of Calliandria suninamensis is used folklorically as a colorant and a dye. The crude powdered sample and methanolic extract of the plant were subjected to phytochemical, proximate analysis and antioxidant activities. Parameters like moisture content, ash values and extractive values were determined. The methanolic extract was evaluated for its antioxidant/free radical scavenging activities using standard 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.