1. - The parecoxib Sodium in a Crystalline form that is substantially anhydrous and substantially no solvatada.2. - parecoxib Sodium of claim 1 is at least in form is characterized by a pattern of x-ray diffraction Powder which has at least two values 2? Selected from the group consisting of 5.6, 9.6, and 14.5 11.0 + 0.2 grados.3.- The parecoxib Sodium of claim 1 is at least form is characterized by a pattern of x-ray diffraction Powder substantially agree with the figure 1.4 the parecoxib Sodium of claim 1 is at least in form is characterized by a Spectrum of R Fourier Transform Infrared substantially agree with the figure 2.5.- The parecoxib Sodium of claim 1 that is shaped to be characterized at least by a differential Scanning Calorimetry thermogram substantially according to figure 3.
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