R-MDMA CRYSTAL FORMS

1 . A composition of a crystalline form salt or polymorph of R-MDMA, wherein said composition is chosen from the group consisting of:

wherein said composition is formed with hydrochloric acid, and said crystalline form is characterized by an x-ray powder diffraction pattern having peaks expressed as 2θ at about 15.8, about 17.5, about 19.7, about 24.8, and about 24.9;

wherein said composition is formed with hydrobromic acid, and said crystalline form is characterized by an x-ray powder diffraction pattern having peaks expressed as 2θ at about 13.9, about 16.3, about 19.8, about 20.5, and about 24.0;

wherein said composition is formed with phosphoric acid, and said crystalline form is characterized by an x-ray powder diffraction pattern having peaks expressed as 2θ at about 13.4, about 14.6, about 17.4, about 18.7, and about 22.1;

wherein said composition is formed with D-tartaric acid, and said crystalline form is characterized by an x-ray powder diffraction pattern having peaks expressed as 2θ at about 6.0, about 12.0, about 13.3, about 17.9, and about 24.1;

wherein said composition is formed with fumaric acid, and said crystalline form is characterized by an x-ray powder diffraction pattern obtained by irradiation with Cu Kα x-rays having peaks expressed as 2θ at about 17.2, about 18.6, about 19.2, about 19.5, and about 21.8;

wherein said composition is formed with oxalic acid, and said crystalline form is characterized by an x-ray powder diffraction pattern obtained by irradiation with Cu Kα x-rays having peaks expressed as 2θ at about 15.2, about 16.4, about 16.8, about 19.3, and about 21.3;

wherein said composition is formed with hydrobromic acid, and said crystalline form is characterized by an x-ray powder diffraction pattern obtained by irradiation with Cu Kα x-rays having peaks expressed as 2θ at about 13.9, about 16.2, about 16.9, about 20.5, and about 24.1;

wherein said composition is formed with phosphoric acid, and said crystalline form is characterized by an x-ray powder diffraction pattern having peaks expressed as 2θ at about 14.5, about 17.4, about 22.0, about 24.7, and about 24.9;

wherein said composition is formed with phosphoric acid, and said crystalline form is characterized by an x-ray powder diffraction pattern having peaks expressed as 2θ at about 12.9, about 13.8, about 17.1, about 26.8, and about 27.8;

wherein said composition is formed with D-tartaric acid, and said crystalline form is characterized by an x-ray powder diffraction pattern having peaks expressed as 2θ at about 5.6, about 11.3, about 15.4, about 17.2, and about 17.8;

wherein said composition is formed with D-tartaric acid, and said crystalline form is characterized by an x-ray powder diffraction pattern having peaks expressed as 2θ at about 5.1, about 16.3, about 19.3, about 20.4, and about 21.8;

wherein said composition is formed with maleic acid, and said crystalline form is characterized by an x-ray powder diffraction pattern having peaks expressed as 2θ at about 14.9, about 18.0, about 25.2, about 25.9, and about 27.9;

wherein said composition is formed with malic acid, and said crystalline form is characterized by an x-ray powder diffraction pattern having peaks expressed as 2θ at about 17.8, about 18.1, about 19.3, about 26.5, and about 27.3;

wherein said composition is formed with napthylene-1,5-disulfonic acid, and said crystalline form is characterized by an x-ray powder diffraction pattern having peaks expressed as 2θ at about 14.6, about 15.2, about 15.8, about 16.8, and about 22.9;

wherein said composition is formed with oxalic acid, and said crystalline form is characterized by an x-ray powder diffraction pattern having peaks expressed as 2θ at about 4.8, about 14.6, about 16.8, about 19.9, and about 21.0;

wherein said composition is formed with sulfuric acid, and said crystalline form is characterized by an x-ray powder diffraction pattern having peaks expressed as 2θ at about 14.9, about 17.8, about 21.0, about 21.2, and about 23.8;

wherein said composition is formed with methanesulfonic acid, and said crystalline form is characterized by an x-ray powder diffraction pattern having peaks expressed as 2θ at about 16.2, about 17.9, about 18.5, about 21.2, and about 26.9; and

wherein said composition is formed with acetic acid, and said crystalline form is characterized by an x-ray powder diffraction pattern having peaks expressed as 2θ at about 17.7, about 18.0, about 18.6, about 19.7, and about 20.3.

2 . The composition of claim 1 , wherein said composition is formed with fumaric acid, and said salt is a hemi-salt.

3 . The composition of claim 1 , wherein said composition is formed with oxalic acid, and said salt is a hemi-salt.

4 . The composition of claim 1 , wherein said composition is formed with napthylene-1,5-disulfonic acid, and said salt is a hemi-salt.

5 . A pharmaceutical composition comprising a crystalline form salt or polymorph of R-MDMA and pharmaceutically acceptable excipients, wherein said crystalline form salt or polymorph of R-MDMA is chosen from the group consisting of:

wherein said crystalline form salt or polymorph of R-MDMA is formed with hydrochloric acid, and said crystalline form is characterized by an x-ray powder diffraction pattern having peaks expressed as 2θ at about 15.8, about 17.5, about 19.7, about 24.8, and about 24.9;

wherein said crystalline form salt or polymorph of R-MDMA is formed with hydrobromic acid, and said crystalline form is characterized by an x-ray powder diffraction pattern having peaks expressed as 2θ at about 13.9, about 16.3, about 19.8, about 20.5, and about 24.0;

wherein said crystalline form salt or polymorph of R-MDMA is formed with phosphoric acid, and said crystalline form is characterized by an x-ray powder diffraction pattern having peaks expressed as 2θ at about 13.4, about 14.6, about 17.4, about 18.7, and about 22.1;

wherein said crystalline form salt or polymorph of R-MDMA is formed with D-tartaric acid, and said crystalline form is characterized by an x-ray powder diffraction pattern having peaks expressed as 2θ at about 6.0, about 12.0, about 13.3, about 17.9, and about 24.1;

wherein said crystalline form salt or polymorph of R-MDMA is formed with fumaric acid, and said crystalline form is characterized by an x-ray powder diffraction pattern obtained by irradiation with Cu Kα x-rays having peaks expressed as 2θ at about 17.2, about 18.6, about 19.2, about 19.5, and about 21.8;

wherein said crystalline form salt or polymorph of R-MDMA is formed with oxalic acid, and said crystalline form is characterized by an x-ray powder diffraction pattern obtained by irradiation with Cu Kα x-rays having peaks expressed as 2θ at about 15.2, about 16.4, about 16.8, about 19.3, and about 21.3;

wherein said crystalline form salt or polymorph of R-MDMA is formed with hydrobromic acid, and said crystalline form is characterized by an x-ray powder diffraction pattern obtained by irradiation with Cu Kα x-rays having peaks expressed as 2θ at about 13.9, about 16.2, about 16.9, about 20.5, and about 24.1;

wherein said crystalline form salt or polymorph of R-MDMA is formed with phosphoric acid, and said crystalline form is characterized by an x-ray powder diffraction pattern having peaks expressed as 2θ at about 14.5, about 17.4, about 22.0, about 24.7, and about 24.9;

wherein said crystalline form salt or polymorph of R-MDMA is formed with phosphoric acid, and said crystalline form is characterized by an x-ray powder diffraction pattern having peaks expressed as 2θ at about 12.9, about 13.8, about 17.1, about 26.8, and about 27.8;

wherein said crystalline form salt or polymorph of R-MDMA is formed with D-tartaric acid, and said crystalline form is characterized by an x-ray powder diffraction pattern having peaks expressed as 2θ at about 5.6, about 11.3, about 15.4, about 17.2, and about 17.8;

wherein said crystalline form salt or polymorph of R-MDMA is formed with D-tartaric acid, and said crystalline form is characterized by an x-ray powder diffraction pattern having peaks expressed as 2θ at about 5.1, about 16.3, about 19.3, about 20.4, and about 21.8;

wherein said crystalline form salt or polymorph of R-MDMA is formed with maleic acid, and said crystalline form is characterized by an x-ray powder diffraction pattern having peaks expressed as 2θ at about 14.9, about 18.0, about 25.2, about 25.9, and about 27.9;

wherein said crystalline form salt or polymorph of R-MDMA is formed with malic acid, and said crystalline form is characterized by an x-ray powder diffraction pattern having peaks expressed as 2θ at about 17.8, about 18.1, about 19.3, about 26.5, and about 27.3;

wherein said crystalline form salt or polymorph of R-MDMA is formed with napthylene-1,5-disulfonic acid, and said crystalline form is characterized by an x-ray powder diffraction pattern having peaks expressed as 2θ at about 14.6, about 15.2, about 15.8, about 16.8, and about 22.9;

wherein said crystalline form salt or polymorph of R-MDMA is formed with oxalic acid, and said crystalline form is characterized by an x-ray powder diffraction pattern having peaks expressed as 2θ at about 4.8, about 14.6, about 16.8, about 19.9, and about 21.0;

wherein said crystalline form salt or polymorph of R-MDMA is formed with sulfuric acid, and said crystalline form is characterized by an x-ray powder diffraction pattern having peaks expressed as 2θ at about 14.9, about 17.8, about 21.0, about 21.2, and about 23.8;

wherein said crystalline form salt or polymorph of R-MDMA is formed with methanesulfonic acid, and said crystalline form is characterized by an x-ray powder diffraction pattern having peaks expressed as 2θ at about 16.2, about 17.9, about 18.5, about 21.2, and about 26.9; and

wherein said crystalline form salt or polymorph of R-MDMA is formed with acetic acid, and said crystalline form is characterized by an x-ray powder diffraction pattern having peaks expressed as 2θ at about 17.7, about 18.0, about 18.6, about 19.7, and about 20.3.

6 . The composition of claim 5 , wherein said crystalline form salt or polymorph of R-MDMA is formed with fumaric acid, and said salt is a hemi-salt.

7 . The composition of claim 5 , wherein said crystalline form salt or polymorph of R-MDMA is formed with oxalic acid, and said salt is a hemi-salt.

8 . The composition of claim 5 , wherein said crystalline form salt or polymorph of R-MDMA is formed with napthylene-1,5-disulfonic acid, and said salt is a hemi-salt.