硬脂酸锌，分子式Zn(C₁₇H₃₅COO)₂。

白色有好闻气味的微细吸湿性粉末。不溶于水、乙醇、乙醚，溶于酸、苯、甲苯和二甲苯。与强酸反应生成硬脂酸与相应的锌盐。加热溶解在有机溶剂中然后冷却，得到胶状物。低毒。

Zinc stearate is a "zinc soap" that is widely used industrially. In this context, soap is used in its formal sense, a metal "salt" of a fatty acid. It is a white solid that repels water. It is insoluble in polar solvents such as alcohol and ether but soluble in aromatic hydrocarbons (e.g., benzene) and chlorinated hydrocarbons when heated. It is the most powerful mold release agent among all metal soaps. It contains no electrolyte and has a hydrophobic effect. Its main application areas are the plastics and rubber industry, where it is used as a releasing agent and lubricant which can be easily incorporated.