Can benzoic acid be used as a food preservative? Why?

Yes, because benzoic acid has strong reducing properties, but for safety, sodium benzoate is generally added.

Here's just what I've learned.

Sodium benzoate can be used as a preservative, mainly because of its effect on inhibiting the growth of microorganisms. Specifically, sodium benzoate can act as an antiseptic in the following ways:

1.Lowers pH: Sodium benzoate is an organic acid that is able to release H+ ions in aqueous solutions, thereby reducing the pH of aqueous solutions.

In the process of growth and reproduction, microorganisms need a pH value suitable for their growth, and too low or too high pH will inhibit the growth of microorganisms, so as to achieve the purpose of preservative.

2.Inhibition of microbial metabolism: Sodium benzophenolate can inhibit the metabolic pathway of microbial formalic acid, reduce the accumulation of acidified metabolites, thereby inhibiting the growth and reproduction of microorganisms.

3.Damage to cell membranes: Sodium benzoate can damage the cell membrane and cell wall of microorganisms, thereby inhibiting the growth and reproduction of microorganisms.

These mechanisms make sodium benzoate an effective preservative, widely used in food, cosmetics and medicine.

Sodium benzoate is a strong alkali differential nucleate weak salt, its protective effect is based on the benzoic acid produced by its hydrolysis, benzoic acid is lipophilic, easy to pass through the cell membrane of Liang Qingsen, enter the cell, interfere with the permeability of the cell membrane of microorganisms such as molds and bacteria, hinder the absorption of amino acids by the cell membrane, enter the oak mu benzoic acid molecule in the cell, acidify the alkali storage in the cell, inhibit the activity of the respiratory enzyme system in the microbial cell, and thus play an antiseptic role.

Be.

Sodium benzoate is also an important acid-based food preservative. Converted to an effective form of benzoic acid when used. For the scope of use and dosage, please refer to benzoic acid.

In addition, it can also be used as a preservative for feed. This product is used as a food additive (preservative), a fungicide in the pharmaceutical industry, a mordant in the dye industry, a plasticizer in the plastics industry, and is also used as a spice.

Sodium formate is a preservative used for internal administration of liquid medicine, which has the effect of preventing deterioration and acidity, and prolonging the shelf life of vertical source socks.

Sodium benzoate (chemical formula: C6H5CO2Na) is a sodium salt of benzoic rancidity. Sodium benzoate is a commonly used food preservative for covering, which has the effect of preventing deterioration and acidity and prolonging the shelf life.

Answer]: B benzoic acid Liang is an acid-based preservative, mainly used for carbonated drinks, low-salt pickles, sauces, preserves, wine, fruit wine, gummy, soy sauce, vinegar, fruit juice drinks and other foods with low protein content. It is generally believed that the toxicity of benzoic acid is relatively low because its metabolic process is involved in metabolic pathways in the body.

Therefore, item B is chosen.

Since the reform and opening up, China's long-standing vinegar factories and soy sauce factories have started joint ventures with foreigners, and preservatives have been put into almost all soy sauce and vinegar. In fact, the vinegar itself has the effect of disinfection and sterilization, when SARS was in Beijing, the author put a vinegar bottle with an open lid at home, and when I had time to think about it, I inhaled vinegar, neither wore a mask, nor did I need to spray disinfectant, nothing happened, and I rarely had a cold. Soy sauce without preservatives will "grow hair" in summer, which is actually some microorganisms, and there is almost no harm after heating at high temperatures, at least much less than sodium benzoate preservatives.

At present, China's food manufacturers (including joint ventures and foreign-funded enterprises) add preservatives in vinegar, soy sauce, and various beverages, pickles, cooked meat and other foods, mainly sodium benzoate and potassium sorbate, and some foods only add one of the preservatives (for example, Coca-Cola company's Sprite adds sodium benzoate), and some foods add both preservatives.

Sodium benzoate is the sodium salt of benzoic acid, and its principle of action is to interfere with the permeability of microbial cell membranes, hinder the adsorption of amino acids, and reduce the activity of enzymes. According to the test of relevant departments, sodium benzoate preservative has the effect of preventing deterioration and acidity, prolonging the shelf life, and excessive dosage will cause harm to the human liver and even cause cancer. It has been reported that a 13-year-old boy in Guangdong Province suffered severe brain atrophy due to long-term consumption of drinks containing sodium benzoate preservatives as water.

This is because sodium benzoate reacts with stomach acid in the body to form benzoic acid. Benzoic acid has a certain toxicity, and long-term consumption will cause chronic benzene poisoning in humans. The main symptoms of chronic benzene poisoning are neurasthenia, such as headache, dizziness, memory loss, insomnia, fatigue, etc.; At the same time, patients will also have leukopenia, and in severe cases, aplastic anemia.

The toxicity of potassium sorbate is much lower than that of sodium benzoate, and the antiseptic effect is also better than that of sodium benzoate. However, due to the low sodium benzoate, many vinegar factories, soy sauce factories, beverage factories and food factories are using a large number of sodium benzoate preservatives, especially those foods with a longer shelf life, the higher the preservative dose of sodium benzoate used, and the greater the harm to the human body. The author saw a kind of edible vinegar with a shelf life of up to 5 years in the supermarket, which is really incredible.

Nowadays, there are more and more people suffering from strange diseases and bad diseases, which are obviously closely related to the sodium benzoate preservatives in commonly used foods. In view of this, the author suggests that everyone should stay away from sodium benzoate as much as possible, avoid or eat less foods containing sodium benzoate as much as possible, and the relevant departments should also enact legislation to prohibit the use of sodium benzoate preservatives in food as soon as possible (some countries have done so).

As a commonly used food preservative, sodium benzoate is mainly due to its strong bactericidal effect. Sodium benzoate can inhibit the growth and reproduction of bacteria, yeasts, molds and other microorganisms in food, thereby extending the shelf life of food. In addition, sodium benzoate can also prevent food from deteriorating and deteriorating, maintain the freshness and taste of food, and ensure the safety and health of consumers.

The antiseptic effect of sodium benzoate is mainly due to its bactericidal effect on microorganisms. In food, microorganisms are one of the main causes of food spoilage. Sodium benzoate can inhibit the metabolism and reproduction of microorganisms by damaging the cell membrane and cell wall of microorganisms, so as to achieve the effect of sterilization.

In addition, sodium benzoate can also hinder metabolites produced by microbial fermentation and spoilage, thereby preventing food spoilage and fermentation. Summoning the Fleet.

In addition to its antiseptic effect, sodium benzoate also has a certain nutritional protective effect. Some vitamins and other nutrients in food are susceptible to microbial contamination and lose their activity and nutritional value. Sodium benzoate can inhibit the growth of microorganisms, thereby protecting the nutrients in the food from being damaged and ensuring the nutritional value of the food.

Of course, sodium benzoate also has some drawbacks and safety issues to be aware of. First of all, excessive use of sodium benzoate can lead to toxicity and other health problems, so dosage and standards should be strictly controlled when using it. Secondly, sodium benzoate may cause adverse reactions in sensitive groups such as allergic people, so the ingredients should be labeled and used with caution in food.

To sum up, the main reason why sodium benzoate is used as a preservative is that it has a strong bactericidal effect, which can effectively extend the shelf life of food and has a nutritional protective effect. Of course, you also need to pay attention to dosage and safety issues when using it. <>

Sodium benzoate (chemical formula: C6H5CO2Na), is a sodium salt of benzoic acid. Sodium benzoate is a very commonly used food preservative, which has the effect of preventing deterioration and acidity, and prolonging the shelf life.

Be.

Sodium benzoate is also an acid-based food preservative that is important for heavy slapping. Converted to an effective form of benzoic acid when used. For the scope of use and dosage, please refer to benzoic acid.

In addition, it can also be used as a preservative for feed. This product is used as a food additive (preservative), a fungicide in the pharmaceutical industry, a mordant in the dye industry, a plasticizer in the plastics industry, and also as a spice for Danhe shirts.

Sodium formate is a preservative used for internal administration of liquid medicine cavity agent, which has the effect of preventing deterioration and acidity, and prolonging the shelf life.