| abstract |
The present invention relates to the provision of two novel crystalline forms for the 5-amino-2,3-dihydropthalazine-1,4-dione sodium salt. Surprisingly, it has been found that Form I and Form II have different immunological effects. This advantageous property is useful for immuno-specific applications. The two forms also have beneficial physicochemical properties useful in preparing, further processing and / or using pharmaceutical formulations of Form I, Form II or mixtures of the two forms. |