Patent ID: 8309610

Claim:
A crystalline form of (1RS,3RS,6RS)-6-dimethylamino-methyl-1-(3-methoxy-phenyl)cyclohexane-1,3-diol hydrochloride selected from the group consisting of: a) crystalline form A which exhibits the 2-theta values 12.9±0.2, 17.5±0.2, 19.0±0.2, 19.3±0.2, 21.0±0.2 and 25.3±0.2 for powder diffraction X-ray lines measured using Cu Kα radiation; b) crystalline form C which exhibits the 2-theta values 14.1±0.2, 17.4±0.2, 19.5±0.2, 20.0±0.2, 23.4±0.2 and 26.6±0.2 for powder diffraction X-ray lines measured using Cu Kα radiation; c) crystalline form D which exhibits the 2-theta values 17.9±0.2, 18.6±0.2, 19.0±0.2, 19.9±0.2 and 25.7±0.2 for powder diffraction X-ray lines measured using Cu Kα radiation; and d) crystalline form E which exhibits the 2-theta values 9.7±0.2, 14.9±0.2, 16.6±0.2, 19.2±0.2, 21.4±0.2 and 27.3±0.2 for powder diffraction X-ray lines measured using Cu Kα radiation.