Vasopressin (arginine vasopressin, AVP) is a nine-amino-acid cyclic neurohypophyseal hormone that regulates water reabsorption, vascular tone and social behavior through V1a, V1b and V2 receptors. Its multiple receptor actions support wide-ranging studies in renal physiology, cardiovascular regulation and behavioral neuroscience. This product is a white lyophilized powder at >=99% HPLC purity in a sealed vial. Batch-specific quality data and dependable cold-chain delivery are provided. Weighing and packing are performed under controlled conditions to ensure accurate fill and secure sealing. Custom requirements such as specified vial sizes, custom labels and quantity splits can be discussed, and repeat orders are prioritized in our production queue for faster turnaround.