硬脂酸钠，分子式C₁₇H₃₅COONa。

白色细微粉末或块状固体，有滑腻感，有脂肪味，在空气中有吸水性。微溶于冷水，溶于热水或醇溶液，水溶液因水解而呈碱性。

Sodium stearate is the sodium salt of stearic acid. This white solid is the most common soap. It is found in many types of solid deodorants, rubbers, latex paints, and inks. It is also a component of some food additives and food flavorings.