Benzoic acid, also known as benzoic acid, is an aromatic acid that has antibacterial activity when not dissociated. Sodium benzoate is a sodium salt of benzoate, which has no odor or a slightly soothing aroma. It can be partially converted into active benzoic acid in acidic substances, and its anti-corrosion mechanism is the same as benzoic acid. Due to its greater solubility in water and stability in air, sodium benzoate has a stronger inhibitory effect on yeast and bacteria, making it more commonly used than benzoic acid. Benzoic acid and sodium benzoate are widely used as food preservatives and are also one of the commonly used preservatives for oral liquid medicine. Studies have shown that benzoic acid and sodium benzoate are often abused by unscrupulous manufacturers in food and medicine due to their low cost. Therefore, excessive intake of benzoic acid and sodium benzoate during consumption is inevitable, which can be harmful to the human liver and even carcinogenic. At present, ...