Patent ID: 8044240

Claim:
A crystalline polymorph of N-(S)-(3,4-difluoro-2-(2-fluoro-4-iodophenylamino)-6-methoxyphenyl)-1-(2,3-dihydroxypropyl)cyclopropane-1-sulfonamide having at least one of the following properties: (a) a powder x-ray diffraction pattern substantially the same as the powder x-ray diffraction pattern shown in FIG. 1 for said crystalline polymorph (b) a differential scanning calorimetry pattern substantially the same as the a differential scanning calorimetry pattern shown in FIG. 2 for said crystalline polymorph or (c) a melting point onset as determined by differential scanning calorimetry at about 143° C. for said crystalline polymorph.