苯甲酸钠的抗菌有效性依赖于食品的pH值，其杀菌抑菌效力随酸度的增大而增强，在碱性条件下则失去杀菌抑菌作用，其防腐的适pH值为2.5-4.0。下面氢氧化钾厂家来讲讲其常见食品防腐剂苯甲酸钠的应用事项。

The antibacterial effectiveness of sodium benzoate depends on the pH value of the food, and its bactericidal and antibacterial efficacy increases with the increase of acidity. Under alkaline conditions, it loses its bactericidal and antibacterial effect, and its optimal pH value for anti-corrosion is 2.5-4.0. Below, potassium hydroxide manufacturers will explain the application of their common food preservative sodium benzoate.

主要用作食品防腐剂，也用于制药物、染料等。苯甲酸类防腐剂是以其未离解的分子发生作用的，未离解的苯甲酸亲油性强，易通过细胞膜，进入细胞内，干扰霉菌和细菌等微生物细胞膜的通透性，阻碍细胞膜对氨基酸的吸收，进入细胞内的苯甲酸分子，酸化细胞内的储碱，抑制微生物细胞内的呼吸酶系的活性，从而起到防腐作用。

Mainly used as a food preservative, but also in the production of drugs, dyes, etc. Benzoic acid type preservatives act on their undissociated molecules. Undissociated benzoic acid has strong lipophilicity and is easy to pass through the cell membrane, enter the cell, interfere with the permeability of microbial cell membranes such as molds and bacteria, hinder the absorption of amino acids by the cell membrane, and the benzoic acid molecules entering the cell acidify the alkali storage inside the cell, inhibit the activity of respiratory enzymes inside the microbial cell, thus playing a preservative role.

苯甲酸是一种广谱抗微生物试剂，对酵母菌、霉菌、部分细菌作用效果很好，在允许大使用范围内，在pH值4.5以下，对各种菌都有抑制作用。

Benzoic acid is a broad-spectrum antimicrobial reagent that has good effects on yeast, mold, and some bacteria. Within the allowable range of use, it has inhibitory effects on various bacteria at pH values below 4.5.

苯甲酸和苯甲酸钠作为防腐剂在食品加工保藏中被广泛使用，而在一些国家的部分食品中限量使用。由于在食品中，苯甲酸可以在游离状态下发挥作用，所以在强酸食品中效果较好。

Benzoic acid and sodium benzoate are widely used as preservatives in food processing and preservation, and are limited in certain foods in some countries. Due to the fact that benzoic acid can act in a free state in food, it has a better effect in strong acidic foods.

苯甲酸一般在碳酸饮料、酱油、酱类、蜜饯和果蔬饮料等使用，苯甲酸在酱油、饮料中可与对-羟基苯甲酸酯类一起使用而增效。苯甲酸和苯甲酸钠常用于保藏高酸性水果、果酱、饮料糖浆以及其他酸性食品，可以低温杀菌合用，起到协同作用。

Benzoic acid is generally used in carbonated beverages, soy sauce, sauces, preserves, and fruit and vegetable beverages. Benzoic acid can be used together with p-hydroxybenzoate esters in soy sauce and beverages to enhance efficiency. Benzoic acid and sodium benzoate are commonly used to preserve highly acidic fruits, jams, beverage syrups, and other acidic foods. They can be used together for low-temperature sterilization and have a synergistic effect.

苯甲酸和苯甲酸钠一般只限于蛋白质含量较高的食品。苯甲酸钠对微生物的作用于苯甲酸相同，可由于是钠盐，若要取得与苯甲酸相同的杀菌效果，所需添加量是苯甲酸的1.2倍。

Benzoic acid and sodium benzoate are generally limited to foods with high protein content. Sodium benzoate has the same effect on microorganisms as benzoic acid, but since it is a sodium salt, the required amount to achieve the same bactericidal effect as benzoic acid is 1.2 times that of benzoic acid.

苯甲酸钠的急性毒性较小，动物最大无作用计量（MNL）为500mg/kg体重。但其在人体肠道的酸环境下可转化为毒性较强的苯甲酸。小鼠摄入苯甲酸及其钠盐，会导致体重下降、腹泻、出血、瘫痪甚至死亡。苯甲酸的毒性是通过改变细胞膜的通透性，抑制细胞膜对氨基酸的吸收，并透过细胞膜抑制脂肪酶等酶的活性，使ATP合成受阻实现的。

The acute toxicity of sodium benzoate is relatively small, and the maximum effective dose (MNL) for animals is 500mg/kg body weight. But it can be converted into highly toxic benzoic acid in the acidic environment of the human intestine. Mice consuming benzoic acid and its sodium salts can lead to weight loss, diarrhea, bleeding, paralysis, and even death. The toxicity of benzoic acid is achieved by altering the permeability of the cell membrane, inhibiting the absorption of amino acids by the cell membrane, and inhibiting the activity of enzymes such as lipase through the cell membrane, thereby hindering ATP synthesis.

添加食品防腐剂的目的是为了改善食品品质、延长保存期、方便加工和保全营养成分。只要按照国家规定的品种范围和使用量进行添加苯甲酸和苯甲酸钠，都是允许的，也是安全的。更多相关内容就来我们网站http://qxu1539600089.my3w.com咨询吧！

The purpose of adding food preservatives is to improve food quality, extend shelf life, facilitate processing, and preserve nutritional components. It is allowed and safe to add benzoic acid and sodium benzoate according to the variety range and usage amount specified by the country. For more related content, come to our website http://qxu1539600089.my3w.com Consult!