Organic preservatives

Include benzoic acid and its salts, sorbic acid and its salts, p-hydroxybenzoic acid esters. Benzoic acid and its salts, sorbic acid and its salts etc. is undissociated molecules from the antibacterial effect. Ethyl lactate  bo be converted into the corresponding acid after the effective , so that the acid preservatives . They acidic conditions to mold , yeast and bacteria have antibacterial activity of some commonly used in juice, beverage , canned food, sauce , vinegar, food preservative . In addition , propionic acid and its salts generated on the inhibition of the ferrous lactate bacterium Serratia particularly effective , and safe , in recent years has been widely used in breads, pastries and other corrosion . Including sulfur dioxide , sulfite and nitrite . Nitrite can inhibit Clostridium botulinum , to prevent botulism , but it is mainly used as a coloring agent . Sulfite inhibit microbial activity of certain enzymes required , and having an acid preservative properties, but mainly used as a bleaching agent . Fungicides rarely directly added to food .