A crystal form of rimsulfuron is provided that exhibits improved solubility and decreased viscosity. Furthermore, a process for its preparation is provided. The novel crystal form is particularly suitable for use in herbicidal compositions and in the control of unwanted plant growth.提供具有改善的溶解度和降低的黏度的晶型的碸嘧磺隆。此外,提供其製備方法。新的晶型特別適用於除草組成物並適用於控制不想要的植物生長。