Poly-L-aspartic acid is widely used as a biodegradable and environmentally friendly alternative to traditional polymers in various industries. In water treatment, it acts as an effective scale inhibitor, preventing the formation of mineral deposits in pipelines and industrial equipment. Its chelating properties make it useful in detergents and cleaning agents, where it enhances the removal of metal ions and improves cleaning efficiency. In agriculture, it is applied as a fertilizer additive to improve nutrient uptake by plants and reduce soil pollution. In cosmetics, it serves as a moisturizer and skin conditioner, helping to make the skin smooth and hydrated. Additionally, it is utilized in biomedical applications, such as drug delivery systems, due to its biocompatibility and ability to form stable complexes with therapeutic agents. Its versatility and eco-friendly nature make it a valuable material in sustainable industrial practices.