Stearic acid is useful as an ingredient in making candles, soaps, plastics, dietary supplement, oil pastels and cosmetics, and for softening rubber.

• 硬酯酸是制造蜡烛、肥料、塑胶制品、食品添加剂、油腊和化妆品的成份之一，亦可使用于软化橡胶；