A process for preparing the crystalline modification II of the anhydrate of boscalid is provided, the process comprising providing a solution of boscalid in an organic solvent system, heating the solution to an elevated temperature, and precipitating solid boscalid from the solution, the elevated temperature being sufficient to preferentially form the crystalline modification II of the anhydrate of boscalid.提供了製備白克列無水物的結晶變體II之方法,該方法包括提供在有機溶劑系統中的白克列溶液,將該溶液加熱到升高的溫度,並從該溶液中沈澱成固體白克列,其中該升高的溫度足以優先形成白克列無水物的結晶變體II。
