High density chitosan is a specialty biopolymer widely used in water treatment processes due to its excellent ability to bind with heavy metals and other pollutants, making it effective for purification and filtration. In the medical field, it is utilized in wound healing products and hemostatic materials, as it promotes tissue regeneration, has antimicrobial properties, and supports drug delivery systems with its biocompatibility and controlled release capabilities. In agriculture, high density chitosan acts as a natural biopesticide and growth enhancer, improving crop yield and resistance to diseases. In the food industry, it serves as an edible coating to extend shelf life by providing a protective barrier against moisture and microbial contamination, as well as a thickener and gelling agent to improve texture and stability. Additionally, it is employed in cosmetics as a component in skin and hair care products, enhancing moisture retention and stimulating skin cell repair.