Crystalline or crystallized acid addition salt of losartan and process for purifying losartan

摘要

The present invention provides a crystalline or crystallized acid addition salt of Losartan useful for obtaining highly pure 2-n-butyl-4-chloro-1-ÄÄ2'-(1H-tetrazol-5-yl)Ä1,1'-biphenylÜ-4-ylÜmethy lÜ-1H-imidazole-5-methanol (Losartan), and a purification method of Losartan that includes production of the crystalline or crystallized acid addition salt.