The preservative used in this product is sodium benzoate.

本产品使用的防腐剂酸钠。

The company said it recently shifted away from this preservative combination to one with sodium benzoate.

该公司表示，它最近已从这种防腐剂组合向酸钠。

So they make a salt of benzoic acid by reacting it with sodium hydroxide — aka lye or caustic soda — to make sodium benzoate.

所以他们通过与氢氧化钠——也就是碱性钠——反应生成酸盐。

Sodium benzoate, for example, has been found to react with ascorbic acid — aka Vitamin C — to produce benzene, a hydrocarbon that's known to cause cancer.

例如，研究发现酸钠与抗坏血酸——也就是维生素 C——反应产生，而是一种已知会导致癌症的碳氢化合物。