氰氨化钙，别名石灰氮，微溶于水，呈强碱性；纯品为白色，一般有碳素等杂质，为灰黑色粉末；含氮20%左右。

工业上用氰氨法制得；以石灰和焦碳为原料，混合后置电弧炉中在2000－2200℃高温下生成碳化钙，经过冷却、磨细再置电阻炉中，与氮气在1000℃左右作用而得；遇水时形成氨基氰。

能使植物叶子脱落，可制成脱叶剂和除草剂；亦可作为肥料，适用于酸性土壤，目前已很少使用。

Calcium cyanamide is the inorganic compound with the formula CaCN₂. This calcium derivative of cyanamide (CN₂) is used as fertilizer, first synthesized in 1898 by Adolph Frank and Nikodem Caro (Frank-Caro process). It is commercially known as nitrolime.