Modafinil polymorphic forms

1. A polymorphic form of modafinil, called CRL 40476 form III, that produces a powder X-ray diffraction pattern comprising interplanar d-spacings of 9.87, 6.25, 5.09, 4.93, 4.36, 4.21 (Å).

2. A polymorphic form of modafinil, of claim 1 that produces the powder X-ray diffraction pattern with interplanar d-spacings of 9.87, 8.74, 8.09, 7.47, 6.25, 5.87, 5.45, 5.09, 5.02, 4.93, 4.49, 4.36, 4.21, 4.08, 3.97, 3.76, 3.64, 3.54, 3.458, 3.358, 3.285, 3.119, 3.039 (Å).

3. A polymorphic form of modafinil, called CRL 40476 form IV, that produces a powder X-ray diffraction pattern comprising interplanar d-spacings of 13.1, 6.57, 3.95 (Å).

4. A polymorphic form of modafinil of claim 3 , that produces the powder X-ray diffraction pattern with interplanar d-spacings of 14.6, 13.1, 8.60, 6.57, 6.30, 5.44, 5.21, 4.85, 4.41, 4.29, 4.14, 4.03, 3.95, 3.87, 3.59, 3.386, 3.284, 3.245, 3.138 (Å).

5. A polymorphic form of modafinil called CRL 40476 form V, that produces a powder X-ray diffraction pattern comprising interplanar d-spacings of 8.44, 5.68, 5.29, 4.64, 4.56, 3.87, 3.80 (Å).

6. A polymorphic form of modafinil of claim 5 that produces the powder X-ray diffraction pattern with interplanar d-spacings of 11.4, 8.44, 7.67, 7.40, 6.65, 6.24, 5.68, 5.29, 4.91, 4.64, 4.56, 4.40, 4.33, 4.07, 4.02, 3.87, 3.80, 3.72, 3.60, 3.424, 3.309 (Å).

7. A polymorphic form of modafinil, called CRL 40476 form VI, that produces a powder X-ray diffraction pattern comprising interplanar d-spacings of 12.1, 8.47, 4.98, 4.23, 4.03 (Å).

8. A polymorphic form of modafinil of claim 7 that produces the powder X-ray diffraction pattern with interplanar d-spacings of 12.1, 8.47, 7.27, 6.05, 5.60, 5.43, 5.09, 4.98, 4.88, 4.45, 4.34, 4.23, 4.03, 4.12, 3.98, 3.77, 3.70, 3.63, 3.412, 3.368, 3.301, 3.324, 3.180, 3.050 (Å).

9. A pharmaceutical composition comprising a polymorphic form of modafinil of claim 1 .

10. A pharmaceutical composition comprising a polymorphic form of modafinil of claim 1 in association with a pharmaceutically acceptable carrier.

11. A pharmaceutical composition comprising a polymorphic form of modafinil of claim 3 .

12. A pharmaceutical composition comprising a polymorphic form of modafinil of claim 3 in association with a pharmaceutically acceptable carrier.

13. A pharmaceutical composition comprising a polymorphic form of modafinil of claim 5 .

14. A pharmaceutical composition comprising a polymorphic form of modafinil of claim 5 in association with a pharmaceutically acceptable carrier.

15. A pharmaceutical composition comprising a polymorphic form of modafinil of claim 7 .

16. A pharmaceutical composition comprising a polymorphic form of modafinil of claim 7 in association with a pharmaceutically acceptable carrier.

17. A pharmaceutical composition comprising a polymorphic form of modafinil of claim 1 wherein the delivery system is selected from a tablet, a capsule, a powder, a pill, a lyophilizate a liquid/suspension or gel/suspension or emulsion.

18. A pharmaceutical composition of claim 17 , wherein the delivery system is a tablet, a capsule, a lyophilizate or a liquid/suspension or gel/suspension.

19. A pharmaceutical composition comprising a polymorphic form of modafinil of claim 3 wherein the delivery system is selected from a tablet, a capsule, a powder, a pill, a lyophilizate, a liquid/suspension or gel/suspension or emulsion.

20. A pharmaceutical composition of claim 19 , wherein the delivery system is a tablet, a capsule, a lyophilizate or a liquid/suspension or gel/suspension.

21. A pharmaceutical composition comprising a polymorphic form of modafinil of claim 5 wherein the delivery system is selected from a tablet, a capsule, a powder, a pill, a lyophilizate, a liquid/suspension or gel/suspension or emulsion.

22. A pharmaceutical composition of claim 21 , wherein the delivery system is a tablet, a capsule, a lyophilizate or a liquid/suspension or gel/suspension.

23. A pharmaceutical composition comprising a polymorphic form of modafinil of claim 7 wherein the delivery system is selected from a tablet, a capsule, a powder, a pill, a lyophilizate, a liquid/suspension or gel/suspension or emulsion.

24. A pharmaceutical composition of claim 23 , wherein the delivery system is a tablet, a capsule, a lyophilizate or a liquid/suspension or gel/suspension.

25. A polymorphic form of modafinil, called CRL 40476 form VII, that produces a powder X-ray diffraction pattern comprising interplanar d-spacings of 12.7, 8.42, 6.45, 4.23, 3.91 (Å).

26. A polymorphic form of modafinil of claim 25 that produces the powder X-ray diffraction pattern with interplanar d-spacings of 12.7, 8.42, 6.45, 6.21, 5.12, 4.75, 4.47, 4.41, 4.33, 4.23, 4.09, 3.91 (Å).

27. A method for preparing CRL 40476 form VII with high purity comprising:

i) dissolving modafinil in acetone;

ii) crystallizing modafinil from the solvent, by adding a volume of water in the range of 50/50 to 90/10 (v/v) based on the acetone solution without stirring; and

iii) separating the solvent to obtain CRL 40476 form VII.

28. A pharmaceutical composition comprising a polymorphic form of modafinil of claim 25 .

29. A pharmaceutical composition comprising a polymorphic form of modafinil of claim 25 in association with a pharmaceutically acceptable carrier.