title: Solid state characterization of mometasone furoate anhydrous and monohydrate forms.
abstract: Mometasone furoate is a potent glucocorticoid anti-inflammatory agent. Its anhydrous Form 1 and monohydrate form were characterized by X-ray crystallography, X-ray powder diffraction at ambient and elevated temperature, thermal analysis, FT-IR, and dynamic moisture adsorption. In Form 1, mometasone furoate molecules pack tightly with molecules interlocked in a space group of P2(1)2(1)2(1). The monohydrate form crystallizes in space group P1. The unit cell of the monohydrate contains one water molecule and one mometasone furoate molecule. The water molecules form channels along the a axis and mometasone furoate molecules pack in layers in the same direction. Dehydration was observed between 60 and 100 degrees C by thermogravimetric analysis with a heating rate of 10 degrees C/min. It corresponds to a broad endotherm over the same temperature range in the differential scanning calorimetry with the same heating rate. Variable temperature X-ray powder diffraction reveals that a new anhydrous form (Form 2) was fully produced above 90 degrees C. This crystalline form was converted to Form 1 after being heated above 150 degrees C; and was totally converted to the monohydrate after 1 day at 23 degrees C, 45% RH.
authors.affiliation: Discovery Support and Pharmaceutical Chemistry, Pharmaceutical Development, K-11-2 J-4, Schering-Plough Research Institute, Kenilworth, New Jersey 07090, USA. xiaoming.chen@spcorp.com
authors.forename: Xiaoming Sean
authors.initials: XS
authors.lastname: Chen
authors.forename: Matthew
authors.initials: M
authors.lastname: Carillo
authors.forename: R
authors.initials: R
authors.lastname: Curtis Haltiwanger
authors.forename: Prudence
authors.initials: P
authors.lastname: Bradley
mesh_terms: D000893:Anti-Inflammatory Agents / Q000737:chemistry*; D002152:Calorimetry, Differential Scanning; D003460:Crystallization; D006860:Hydrogen Bonding; D015394:Molecular Structure; D000068656:Mometasone Furoate; D044367:Phase Transition; D011244:Pregnadienediols / Q000737:chemistry*; D017550:Spectroscopy, Fourier Transform Infrared; D013696:Temperature; D014867:Water / Q000737:chemistry; D014961:X-Ray Diffraction
chemical_list: D000893:Anti-Inflammatory Agents; D011244:Pregnadienediols; D000068656:Mometasone Furoate; D014867:Water