Patent ID: 8394963

Claim:
A process for preparing Form A of (S)-5-methoxy-2-[[(4-methoxy -3,5-dimethyl-2-pyridinyl)-methyl]sulfinyl]-1H-benzimidazole magnesium dihydrate comprising crystallizing or recrystallizing crude (S)-5-methoxy-2-[[(4-methoxy -3,5-dimethyl-2-pyridinyl)-methyl]sulfinyl]-1H-benzimidazole magnesium dihydrate in the presence of ethyl acetate, wherein Form A of )-5-methoxy-2-[[(4-methoxy-3,5-dimethyl-2-pyridinyl)-methyl]sulfinyl]-1H-benzimidazole magnesium dihydrate has the XRPD pattern as shown in FIG. 3 .