Two methods for preparing crystallised dintroglycoluril (DINGU) via.recrystallization from nitric acid or nitration of glycoluril in mixed acid of HNO_3-H_2SO_4 were investigated.

• 介绍了用硝酸重结晶及用硝硫混酸硝化甘脲直接制备二硝基甘脲晶体的方法及用二甲基亚砜制备二硝基甘脲晶体的结果。