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Last Updated: December 12, 2025

Claims for Patent: RE34672

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Summary for Patent: RE34672

Title:	Pharmaceutical composition containing a stable modification of torasemide
Abstract:	The present invention provides a process for the preparation of cystalline torasemide in the pure modification I (monoclinic, space group P21/c, melting point 162 DEG C.) from torasemide of modification II (monoclinic, space group P2/n, melting point 169 DEG C.), wherein a suspension of torasemide of modification II is stirred in water with the addition of a catalytic amount of modification I until the rearrangement is complete. The present invention also provides pharmaceutical compositions containing torasemide of modification I.
Inventor(s):	Fritz Topfmeier, Gustav Lettenbauer
Assignee:	Roche Diagnostics GmbH
Application Number:	US08/043,631
Patent Claims:

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