The preservative used in this product is sodium benzoate.

本产品用的防为苯甲酸钠。

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

该公司表示，它最近已从这种防合转向苯甲酸钠。

Of course, there were plenty of attempts to preserve the sauce, including using the preservative benzoate.

当然， 有多尝试来保存这种酱料，用防苯甲酸。

And when benzoate was finally banned in 1906, the ketchup producers needed to find another solution.

当苯甲酸在1906年最终被禁用后，番茄酱生产商需要找到另一种解决方案。

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