Is a
Patent attributes
Current Assignee
Patent Jurisdiction
Patent Number
Patent Inventor Names
Takanori Ushio0
Hidenori Miura0
Keiko Nagai0
Date of Patent
November 21, 2006
0Patent Application Number
102976010
Date Filed
April 16, 2002
0Patent Primary Examiner
Patent abstract
Provided are a suplatast tosilate crystal showing characteristic peaks in powder X-ray diffraction diffraction angles (20±0.1°) of 5.6°, 9.0°, 11.0°, 15.3°, 16.5°, 17.2°, 17.9°, 19.2°, 19.9°, and 21.5°; and a preparation process of the crystal. Owing to merits such as fluctuation-free optically active substance ratio, low hygroscopicity and high storage stability, the suplatast tosilate crystal of the present invention can be mass-produced easily and, at the same time, is advantageous in drug preparation quality management. It is thus excellent as raw material for pharmaceuticals.
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