butanoic acid

例句：

1. 1.Butanoic acid is a compound that can be used as a food additive.
   丁酸是一种可以用作食品添加剂的化合物。
2. 2.The butanoic acid was used to treat acne.
   丁酸被用来治疗痤疮。
3. 3.Butanoic acid is also used in the production of plastics and other polymers.
   丁酸还用于生产塑料和其他聚合物。