NEW CRYSTALLINE FORM OF CLOPERASTINE HYDROCHLORIDE

The present invention provides a compound of new crystalline form I and form II of 1-[2-[(4-chlorophenyl)phenylmethoxy]ethyl]piperidinium monohydrochloride. The compound of form I has an X-ray diffraction pattern expressed in terms of 2-theta angles that comprises the following peaks: 15.5, 15.9, 17.6, 18.3, 18.8, 19.8, 20.2, 20.8, 21.2, 21.9, 22.9, 24.8, 25.7, 27.7, 28.0, and 30.6 degrees. In addition, the compound of form II has an X-ray diffraction pattern expressed in terms of 2-theta angles that comprises the following peaks: 14.8, 16.7, 17.3, 18.0, 18.2, 19.8, 20.5, 21.1, 22.8, 23.7, 25.0, 25.2, 25.4, 26.4, 27.8, 28.3, 29.0, 29.9, and 31.6 degrees.