Ipidacrine hydrochloride is pharmaceutically active compound that forms variety of crystalline modifications which differs by solvent type and content in crystalline structure. These crystalline forms analyzed by powder x-ray diffraction, differential thermal analysis, thermogravimetry and Karl Fisher titration.

Obtained crystalline forms include two monohydrates, two hemihydrates, two anhydrous forms, two non-stoichiometric hydrates and mixed solvates with octanol and water and methanol and water, solvate with chloroform and dimethylformamide.