Caerulein is supplied as white lyophilized powder with molecular formula C58H73N13O21S2 and molecular weight 1352.42. Caerulein is a sulfated decapeptide originally obtained from frog skin and structurally related to cholecystokinin. It is a standard pharmacological tool for stimulating pancreatic enzyme secretion in isolated acinar cells and in perfused organ preparations. Gastrointestinal researchers use it to induce gallbladder contraction, alter gut motility and model acute pancreatitis in rodents. Because it acts through CCK receptors, it is also employed in receptor pharmacology experiments comparing CCK1 and CCK2 selectivity. Dosing and infusion protocols vary widely between laboratories, so preliminary range-finding experiments are recommended. Standard pack sizes are 5 mg, 10 mg, 25 mg and 50 mg per vial, with larger quantities available on request. Vials are amber glass with butyl rubber stoppers and aluminum crimp seals, labelled with product name, lot number, CAS number, net mass and storage condition. Outer cartons use molded cushioning to protect the cake during transit, and orders containing several peptides are packed so that vials remain physically separated and cannot abrade one another. YIWU SHUNXIAN TRADING CO., LTD. stands as a beacon of precision and reliability in the realm of high-purity research-grade peptides and essential laboratory consumables. As a professional supplier, we are meticulously dedicated to empowering global research teams in their groundbreaking biochemical and life-science studies. With unwavering commitment, we bridge the gap between meticulously qualified peptide raw-material resources, each batch rigorously tested for purity and consistency, and a robust network of stable international logistics services, ensuring that cutting-edge research materials reach laboratories worldwide with the utmost efficiency and care. Our offerings provide researchers and industry partners with a dependable, trustworthy source, fostering an environment where innovation thrives, experiments yield accurate results, and laboratory development projects progress seamlessly, supported by the highest standards of quality and service. Conformity assessment relies on reverse-phase HPLC at 214 nm, supported by electrospray mass spectrometry for identity confirmation. Each lot is released only when the chromatographic purity reaches 99 percent or above, and residual trifluoroacetate, water content and endotoxin levels are recorded on the batch record. Analytical chromatograms and mass spectra are archived so that a research group can request the corresponding data for a specific lot number when a reviewer or internal audit requires supporting information. For quotations, packing options, lot documentation or delivery scheduling, contact Aurora on WhatsApp at +852 4423 6619, or write to 18963519387@163.com with the product name, required quantity and destination country. Including the intended application and any buffer or solubility constraints helps us recommend the most suitable pack size and confirm the practical transit window for your location. Where a study extends beyond a single working session, plan the storage format before reconstituting. Divide the contents into aliquots sized for one experiment, freeze them rapidly, and label each tube with the peptide name, concentration, buffer and date. Keep the stock vial sealed and cold between weighing sessions. This approach limits the number of thaw events, which is the most common cause of gradual potency loss in peptide research. Dispatch is normally within one to two business days after order confirmation, using tracked international courier services. Lyophilized peptides travel well at ambient temperature for typical transit periods, and gel packs are added when a destination or season makes temperature excursion a concern. Tracking details are provided at dispatch, and consolidated shipping is available when a laboratory orders several products at the same time.