Process for Preparing a Pure Polymorphic Form of 3-Pyridyl-1-Hydroxyethylidine-1, 1-Bisphosphonic Acid Sodium Salt
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Aug 21, 2006
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Nov 9, 2004
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Abstract
This process in general relates to the novel process for preparing polymorphic forms of 3-pyridyl-1-hydroxyethylidine-1,1-bisphosphonic acid sodium salt (Risedronate Sodium) in particular risedronate Form A and B employing a solvent system in an appropriate ratio. An improved process for preparation of risedronic acid is also disclosed in the present invention.
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