Magainin I is supplied as white lyophilized powder with molecular formula C114H180N30O29S and molecular weight 2409.8. Magainin I is a 23-residue antimicrobial peptide first identified in the skin of Xenopus laevis, and it is widely treated as the lower-activity reference member of the magainin pair. Research teams use it alongside Magainin II to quantify how a single amino acid substitution alters membrane binding affinity and bactericidal kinetics. Applications include minimum inhibitory concentration determination, membrane permeability assays with fluorescent dyes and comparative studies of peptide-induced toroidal pore formation. It is also used in teaching laboratories and method-development work where a well-characterized, moderately potent peptide is preferable to a highly active compound. For maximum stability, keep the vial at minus 20 degrees Celsius and limit the number of times it is brought to room temperature. Condensation is the main risk in humid climates, so allow sealed vials to warm fully before breaking the seal. Reconstituted stock solutions should be kept at 2 to 8 degrees Celsius only for short-term use within the same working day, and at minus 80 degrees Celsius for longer intervals, always as single-use aliquots. Purity is determined by integration of the main peak in reverse-phase HPLC chromatograms, and identity is confirmed by mass spectrometry before release. Water content is kept within the range specified for lyophilized peptide powders to limit hydrolytic degradation during storage. Where a research protocol requires it, we can supply the chromatogram, the mass spectrum and the calculated peptide content for the corresponding lot, so that the material can be entered into a laboratory quality system with full traceability. Delivery is arranged through tracked courier services covering most research destinations. Standard transit uses ambient conditions, which is appropriate for lyophilized peptide powders; ice packs are available for customers who prefer additional thermal protection. Consolidated dispatch is offered so that a laboratory ordering a panel of peptides receives one parcel rather than several, which reduces both freight cost and administrative workload. Vials are packed under controlled humidity, sealed, and then cushioned inside a rigid outer carton. Available formats include 1 mg, 5 mg, 10 mg and 50 mg, with custom fill masses for projects that require a specific quantity per experiment. Labels record the lot number and the analytical release date. We can also supply kits in which several related peptides are packed as a matched set, which is convenient for comparative structure-activity studies run within a single laboratory. Quotations, custom fill masses and logistics questions are handled by Aurora, reachable on WhatsApp at +852 4423 6619 or by email at 18963519387@163.com. A short message listing the product name, quantity and destination is sufficient for us to confirm stock, price and the expected delivery schedule, and to advise on packing if the material must travel to a humid or remote location. YIWU SHUNXIAN TRADING CO., LTD. serves the global research community as a supplier of high-purity peptides and laboratory consumables, with a operating model built around consistency, documentation and reliable delivery. Qualified raw materials are sourced against defined specifications, processed through purification and lyophilization, and released only after analytical confirmation of purity and identity. We support research teams in academic institutions, contract laboratories and biotechnology companies, and we understand that the practical requirements of these groups differ: some need small exploratory quantities, others require repeated bulk supply against a fixed specification. Our logistics arrangements are designed to accommodate both, and our communication is direct, technical and oriented towards solving the actual problem a laboratory faces.