... food preservative which is highly efficient, safe, and has no side-effects. Poly-L-lysine (ε-poly-L-lysine, EPL) is ... highly efficient, safe, and has no side-effects. Quality standard; FAO/WHO,1992 Application: ε-Polylysine was generally recognized as a safe ... preservatives, can attain better effect. ITEMSTANDARDDescriptionPale yellow powderε-Polylysine Purity(ε-PL.HCL)≥95%(ε-PL)≥80%Loss on drying≤ ...