Patent ID: 6933380
Filing Date: 2005-08-23
Classification: A61K,C08B

Abstract:
1. A low-residual-solvent excipient which has residual solvent of less than 3000 ppm; wherein said low-residual-solvent excipient possesses a water absorbing property which is characterized by the presence of a methoxy alkylcarboxyl (—CH wherein R is a lower alkyl group having 1-4 carbon atoms; wherein A said low-residual solvent excipient being produced by mixing an excipient possessing said water absorbing property with a solvent/water solution which contains no more than 40% by volume of water to form a solvent/water/excipient mixture; filtering said solvent/water/excipient mixture to obtain a water-containing low-residual-solvent excipient; and driving said water-containing low-residual-solvent excipient to obtain said low-residual solvent excipient.