Normal propyl alco-hol belongs to medium impurity and dissolves in water and alcohol,its boiling point is similar as alcohol.

• 正丙醇属中级杂质；与水、乙醇混溶；沸点较接近乙醇；分离难度较大。应从多方面着手；控制正丙醇含量:1.；使用产正丙醇少的酵母菌种。