abstract |
Provided herein is an improved process for preparing highly pure celecoxib polymorphic form III characterized by an X-ray powder diffraction pattern having peaks expressed as 2-theta angle positions at about 5.32, 10.68, 10.97, 13.0, 14.82, 16.07, 17.91, 19.64, 21.49, 22.17, 22.43, 23.44, 25.37, 26.96 and 29.56 ± 0.2 degrees. |