For procurement managers and R&D scientists in various industries, understanding the fundamental chemistry and versatile applications of specialized ingredients like Polylysine (CAS: 25104-18-1) is crucial. Polylysine, a homopolymer of the amino acid L-lysine, is a fascinating molecule with a unique set of properties that lend themselves to a wide array of industrial uses. As a leading Polylysine manufacturer in China, we aim to provide clear insights into why this compound is a valuable asset for many businesses.

At its core, Polylysine is a polypeptide chain formed by the linkage of L-lysine residues. The specific linkage in ε-poly-L-lysine (EPL), the most common commercially produced form, involves the alpha-carboxyl group of one lysine and the epsilon-amino group of another. This arrangement results in a polymer with multiple positively charged amino groups along its chain, particularly at neutral pH. This cationic character is fundamental to many of its applications, enabling electrostatic interactions with negatively charged surfaces and molecules.

Key chemical properties that make Polylysine highly desirable include:

  • Broad-Spectrum Antimicrobial Activity: The cationic charges disrupt bacterial cell membranes, leading to leakage and cell death. This broad-spectrum efficacy against Gram-positive and Gram-negative bacteria, as well as fungi and yeasts, makes it a superior preservative.
  • Thermal and pH Stability: Unlike many other biological molecules, Polylysine remains active and stable under relatively harsh conditions. It withstands temperatures up to 121°C for 30 minutes and maintains its antimicrobial power across a pH range of 2 to 9. This resilience is vital for applications involving heat treatment or varying pH environments.
  • Water Solubility: Polylysine is highly soluble in water, facilitating its incorporation into aqueous formulations without significant solubility issues.
  • Biocompatibility and Safety: As a derivative of an essential amino acid, Polylysine is safe for consumption and use. It is metabolized into lysine in the body, providing nutritional value rather than posing toxicity risks. Its recognition as GRAS in the US and its approval in various regions underscore its safety profile.

These properties translate into a wide range of industrial applications. In the food sector, it's a premier natural preservative. In cosmetics and personal care, it acts as a preservative and potential conditioning agent. In pharmaceuticals, it's explored for drug delivery systems and as a preservative for medicinal formulations.

For industrial buyers seeking to source Polylysine, partnering with a reliable manufacturer in China is key. We offer consistent quality and competitive pricing for bulk orders. Understanding these chemical properties will help you effectively integrate Polylysine into your product development, whether you aim to enhance preservation, improve delivery, or meet consumer demand for natural ingredients. Inquire with us today to learn more about purchasing Polylysine and securing a stable supply chain.