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The present investigation deals with a simple preparation of new formulation of tin–sucralfate freeze-dried kit (F.D.K.), to be directly labeled with 99mTc at optimal pH value of 7.0. The lyophilized form containing 100 mg sucralfate and 11.3 mg dihydrated stannous chloride. Other optimal pH values of the preparation were found to be from 4.0 to 11.0. The range of sucralfate amount studied (50–500 mg)...