苯甲酸及其钠盐是较早法定的防腐剂,应用于食品、化妆品和医药等方面。长期应用发现在某些制剂中效果较差,特别是苯甲酸钠,有人认为其防腐作用是值得讨论的,曾有不少药厂和药房使用苯甲酸钠作防腐剂发生过问题,因而建议不用来代替苯甲酸。 Benzoic acid and its sodium salt are the older statutory preservatives used in food, cosmetics and pharmaceuticals. Long-term application found in some formulations less effective, especially sodium benzoate, some people think that its antiseptic action is worth discussing, there have been many pharmaceutical companies and pharmacies using sodium benzoate as a preservative had problems, it is recommended not to replace benzoic acid.