The unique electronic and crystal structure of intermetallic compounds allows their use for heavy metal removal. Here, we report the synthesis of FeSb2 particles via a green and cost-effective co-precipitation method and their utilization for the efficient removal of highly toxic hexavalent chromium from aqueous solutions. The structure and morphology of FeSb2 particles were confirmed by X-ray diffraction (XRD) and scanning electron microscope (SEM), respectively. Batch adsorption experiments were carried out in Cr (VI) solutions of various concentrations (2-10 mg L-1). Cr (VI) removal by FeSb2 particles was found to follow pseudo-second-order kinetic and Langmuir isotherm models with a maximum adsorption capacity (qm) of 7.79 mg g-1. This study paves the way for other intermetallic compounds for various other wastewater treatments.