Crystalline forms for 5-amino-2, 3-dihydrophthalazine-1, 4-dione sodium salt, pharmaceutical preparations containing the same and method for the production of said forms

摘要

The invention relates to the provision of two novel crystalline forms I and II for 5-amino-2,3-dihydrophthalazine-1,4-dione sodium salt. Surprisingly, it was discovered that form I and form II have differing immunological effects. This advantageous property is useful for immunospecific applications. In addition, both forms have advantageous physicochemical properties, which are useful in the production, further processing and/or use of a pharmaceutical preparation of form I or form II or a mixture of both.

主权项

1. A crystalline polymorph form of a 5-amino-2,3-dihydrophthalazine-1,4-dione alkali salt, wherein said crystalline polymorph form is either form I or form II which are characterized by the following crystallography values determined by means of x-ray powder diagrams:
form I:
d values: 13.5; 6.9; 5.2; 4.6; 3.9; 3.5; 3.4; 3.3; 3.1; 3.0 and/or2-theta values: 6.5; 12.7; 16.9; 19.3; 22.8; 25.8; 26.6; 27.2; 28.7; 30.3 and form II:
d values: 12.9; 7.9; 7.1; 6.5; 5.3; 4.0; 3.7; 3.6; 3.3; 3.2 and/or2-theta values: 6.8; 11.2; 12.5; 13.7; 16.7; 22.4; 24.3; 24.9; 27.2; 27.8.