| 摘要 |
Colistin sulfate granules improved in the stability of potency in feed and exhibiting high solubility can be provided without using expensive carriers or special facilities. Specifically, said colistin sulfate granules substantially comprise colistin sulfate and have a particle diameters of 150 to 1,500 mu m, a specific surface area of 40 to 500 cm<2>/g, a wetting time of 5 minutes or less and a moisture content of 10 % or less. |
