LL-37 is a cationic antimicrobial peptide belonging to the cathelicidin family, widely studied in innate immunity and host-defense research. It is supplied as a high-purity white lyophilized powder (>=99% HPLC) in sealed vials for laboratory use. LL-37 is investigated for its antimicrobial, immunomodulatory and wound-healing properties, and is commonly applied in cell-culture, infection and inflammation research. The stable freeze-dried format supports convenient reconstitution and reproducible dosing. As a host-defense peptide, it does not have a single formally assigned CAS number. Strict quality control is maintained across batches to ensure reliable experimental outcomes. Every batch undergoes strict quality control, and a Certificate of Analysis (COA) is available for specific batches upon request to support reproducible laboratory work. For storage, keep the unopened reagent sealed at 2-8 degree C and protected from light and moisture; for long-term storage, store at -20 degree C and avoid repeated freeze-thaw cycles. We support both small trial orders and large-volume bulk orders. OEM and private-label packaging services are available for research projects, and secure neutral packing is used for all shipments with worldwide delivery to the USA, Europe, Canada, Australia, the UK and many other regions. Please note that this product is intended for laboratory research use only and is not for human or veterinary application.