N,N-DIMETHYLTRYPTAMINE SALTS AND CRYSTALLINE SALT FORMS

1 . A N,N-dimethyltryptamine (DMT) oxalate crystalline Form A.

2 . The DMT oxalate crystalline Form A of claim 1 , wherein the crystalline Form A is characterized by an X-ray powder diffraction (XRPD) pattern having peaks at 19.26±0.2, 22.03±0.2, and 27.51±0.2° 2θ.

3 . The DMT oxalate crystalline Form A of claim 2 , wherein the crystalline Form A is further characterized by at least one peak selected from 14.63±0.2, 17.60±0.2, 20.32±0.2, 23.57±0.2, 24.34±0.2, and 25.78±0.2° 2θ.

4 . The DMT oxalate crystalline Form A of claim 2 , wherein the crystalline Form A is further characterized by at least one peak selected from 5.86±0.2, 11.77±0.2, 14.41±0.2, 14.63±0.2, 15.85±0.2, 16.06±0.2, 16.93±0.2, 17.29±0.2, 17.60±0.2, 17.70±0.2, 17.95±0.2, 18.10±0.2, 19.65±0.2, 20.00±0.2, 20.32±0.2, 21.21±0.2, 22.40±0.2, 22.71±0.2, 22.92±0.2, 23.57±0.2, 24.34±0.2, 25.78±0.2, 26.45±0.2, 26.65±0.2, 26.97±0.2, 27.77±0.2, 28.76±0.2, 29.09±0.2, 31.12±0.2, 31.57±0.2, 32.54±0.2, 32.81±0.2, 33.12±0.2, 33.22±0.2, 33.67±0.2, 34.24±0.2, and 34.58° 2θ.

5 . The DMT oxalate crystalline Form A of claim 1 , wherein the crystalline Form A provides an XRPD pattern substantially in accordance with FIG. 5 .

6 . The DMT oxalate crystalline Form A of claim 1 , wherein the crystalline Form A exhibits a TGA thermograph substantially in accordance with FIG. 7 .

7 . The DMT oxalate crystalline Form A of claim 1 , wherein the crystalline Form A exhibits a DSC thermograph substantially in accordance with FIG. 7 .

8 . The DMT oxalate crystalline Form A of claim 1 , wherein the crystalline Form A has a melting point of about 135.2° C. when measured under ambient conditions.

9 . A N,N-dimethyltryptamine (DMT) fumarate crystalline Form A, DMT malate crystalline Form A, or DMT sulfate crystalline Form A.