Also known as benzoic acid, benzoic acid (C7H6O2) is a hydrogen of benzene ring replaced by carboxyl (-cooh) group - formation of the compound. Benzoic acid in general is often used as a drug or preservatives, inhibit the growth of fungi, bacteria, mold, the medicinal) on the skin, usually used to treat tinea skin disease. Used in synthetic fiber, resin, paint, rubber, tobacco industry 

Method of use: 1, the bacteriostatic activity of benzoic acid molecule state, relatively high ion state, so the PH is less than 4, the bacteriostatic activity is high, its minimum bacteriostatic concentration of 0.015% to 0.015%. To reduce the but its solubility in acid solution, it is not only to increase the solution acidity to improve its antibacterial activity. The optimal bacteriostatic benzoic acid PH 2.5 ~ 4.0. 

2, because the solubility of benzoic acid in water is low, so the actual number is just the right amount of sodium bicarbonate or sodium carbonate, with more than 90 ℃ hot water dissolved and make it into after sodium benzoate sodium added to food. If must use benzoic acid, can use a moderate amount of ethanol first dissolve before application. 

3, due to the solubility of benzoic acid in water is lower than sodium benzoate, so the use of sodium benzoate in acidic food, attention should be paid to prevent caused by sodium benzoate into benzoic acid precipitation and reduce its use effect. 

4, 1 g of benzoic acid is equivalent to 1.18 g, sodium benzoate, 1 g sodium benzoate is equivalent to 0.847 g benzoic acid 

5, and benzoic acid in soy sauce, cool and refreshing drinks can be used with on - hydroxy benzoic acid esters and increase efficiency. 

Basic purpose: set incense is usually used as a agent or preservatives. Insurance agent is also used as a fruit drink. Can be used as a cream with the sweet sweet. Can also be used for chocolate, lemon, orange, berries, nuts, candied fruit flavor, is also commonly used in cigarette flavoring. 

Note: for external use only local may have mild stimulation. Oil ointment should not be stored in the temperature too high. 

Environmental hazards: has harm to the environment, the water and air pollution. 

Combustion hazard: the goods combustible, stimulative. 

Dangerous characteristic: open flame, high fever combustible.