FT-IR study on interactions between medroxyprogesterone acetate and solvent in CHCl3/cyclo-C6H12 and CCl4/cyclo-C6H12 binary solvent systems

► The interactions of MPA with CHCl3 and CCl4 have been studied by FT-IR. ► The MPA-CHCl3 and MPA-CCl4 complexes are formed by H-bonding interactions. ► The stoichiometries of MPA-CHCl3 and MPA-CCl4 complexes are 1:3 and 1:1, respectively.