Arginine-HCl solution is widely used in the pharmaceutical industry as an excipient in drug formulations. It helps stabilize proteins and peptides, enhancing their solubility and bioavailability in injectable medications. In cell culture applications, it serves as a nutrient source, promoting cell growth and protein synthesis. Additionally, it is utilized in the production of nutritional supplements to support immune function and improve exercise performance. In biochemical research, it acts as a buffer agent, maintaining pH stability in various experimental setups. Its role in wound healing products is also notable, as it aids in tissue repair and regeneration.