1. Disturb the enzyme system of microorganisms, destroy their normal metabolism, and restrain the activity of enzyme.
2. Make the protein of microorganisms freezing and denaturation, disturb its existence and breed.
3. Change the cell plasma membrane’s permeability; make the enzymes and metabolic product of the body out and inactivation.
Parabens include Methylparaben, Ethylparaben, PropylParaben, Butyl Paraben, Isopropyl Paraben, and Isobutyl Paraben and so on. Among of them, Methylparaben’s preservative property is the best. In China, the Ethylparaben and Propyl Paraben are the widest use. In Japan, Butyl Paraben is the widest use. The major properties of Parabens is the wide series products and wide bacteriostatic spectrum .The working mechanism is destroy the cell membrane of microorganisms, and change the nature of cell protein, and restrain the activity of respiratory enzyme system and electron transfer enzyme system. Parabens’ antimicrobial activity element is the molecular state action.
America, Europe, Japan, Canada, Korea, Russia and other countries all allow parabens used in food industry. Parabens are widely used in soy sauce, vinegar, pickle, bakery, paste products, beverage, rice wine and fresh-keeping industry.
As the Parabens are hard to dissolve in water, we usually dissolve them in sodium hydroxide (NaOH), acetic acid, alcohol, and then apply them into uses. To achieve the best preservative effects, it is best to mix two or three kinds parabens into use. Ethylparaben is usually used in soy sauce and vinegar, while Propyl Paraben is usually used to retain freshness of fruit, drinks, and vegetables. When used, it can be used in the form of addition, dipping, coating and atomizing, spread it on the surface or make its adsorption in the internal. In the use of the same amount of preservative conditions, the more serious the food contamination, the more bacterial count, the worse preservative effect. Therefore, we should keep a good sanitary condition to reduce the bacterium count. In addition, we also could match it with other sterilization and package to try best to reduce the contamination of food. It is a very important point to prove a good and safety environment.
Know more paraben preservatives
which can used in food, cosmetic.