ε-Polylysine hydrochloride is a natural microbial metabolic product formed by lysine residues, an essential amino acid for humans, connected through specific chemical bonds. It can be completely digested and absorbed by the human body without any toxic side effects, making it a highly safe option when used as a food additive. In 2014, the National Health and Family Planning Commission approved ε-Polylysine as a new food additive, further confirming its safety.
ε-Polylysine hydrochloride has significant inhibitory and bactericidal effects on Gram-positive bacteria, Gram-negative bacteria, fungi, and some heat-resistant spore-forming bacteria. Notably, it also effectively inhibits Gram-negative bacteria, such as Escherichia coli and Salmonella, which are not easily controlled by other natural preservatives. Its high antibacterial efficiency allows it to be effective even at low concentrations, reducing usage and lowering costs.
ε-Polylysine hydrochloride does not decompose at high temperatures (remaining stable even after being heated at 120°C for 120 minutes), making it suitable for sterilization processes with raw materials without losing activity due to heating. Its antibacterial activity is not affected by pH levels, maintaining good antibacterial effects in neutral and mildly acidic environments.
ε-Polylysine hydrochloride is easily soluble in water, allowing it to quickly and evenly disperse in food, enhancing preservative effects.
It can be used for the preservation of fruits, vegetables, beans, edible fungi, rice and rice products, wheat flour and its products, miscellaneous grain products, meat and meat products, seasonings, beverages, and various other foods. It can also be used in combination with other preservatives (such as alcohol, organic acids, glycerides) to further enhance its preservative effects.
As a biological preservative, ε-Polylysine hydrochloride has high safety, a broad antibacterial spectrum, good stability, good solubility, and wide applications. These advantages provide ε-Polylysine hydrochloride with broad application prospects in the field of food preservation.