Patent ID: 8658132
Filing Date: 2014-02-25
Classification: A61K,C07B,C07C

Abstract:
1. A method for producing a radioactive diagnostic imaging agent containing a radioactive 18 fluorine-labeled organic compound represented by the following formula (1): which comprises a first step of providing a solution containing the radioactive a second step of adding hydrochloric acid to the solution obtained in the first step in an amount sufficient for the solution to be kept within a pH of 2.0-5.9 in the following third step, and a third step of diluting the solution obtained in the second step in order to adjust the solution to a desired radioactive concentration within a pH of 2.0-5.9, whereby said radioactive diagnostic imaging agent is obtained, wherein in the second step the hydrochloric acid is added in an amount corresponding to 0.4-2.8 mmol per 1 L of the solution in the third step.