Polymorphic forms of ladostigil tartrate

A crystalline ladostigil tartrate characterized by an x-ray diffraction pattern selected from the group consisting of:

• a) an x-ray diffraction pattern having peaks at 4.3, 5.6, 11.2, 13.0, 16.8, and 19.9±0.2 degrees two theta;
• b) an x-ray diffraction pattern having peaks at 5.8, 10.8, 13.3, 17.4, 23.6±0.2 degrees two theta;
• c) by an x-ray diffraction pattern having peaks at 4.9, 8.7, 12.0, 13.6, and 18.9±0.2 degrees two theta;
• d) an x-ray diffraction pattern having peaks at 3.3, 6.4, 13.0, 13.3, and 19.6±0.2 degrees two theta;
• e) an x-ray diffraction pattern with peaks at 4.4, 8.5, 10.5, 15.6 and 17.7±0.2 degrees two theta;
• f) an x-ray diffraction pattern with peaks at 6.5, 12.0, 13.0, 13.3 and 18.6±0.2 degrees two theta;
• g) by an x-ray diffraction pattern having peaks at 6.3, 12.2, 12.7 and 24.7±0.2 degrees two theta;
• h) an x-ray diffraction pattern having peaks at 3.5, 6.5, 12.8, 19.3, and 21.1±0.2 degrees two theta;
• i) an x-ray diffraction pattern having peaks at 6.4, 12.1, 12.8, and 14.6±0.2 0.2 degrees two theta;
• and
• j) an x-ray diffraction pattern having peaks at 4.5, 8.9, 11.4, 14.6, and 18.4±0.2 degrees two theta.