Carboxymethyl chitosan is widely used in the biomedical field due to its biocompatibility and biodegradability. It is commonly applied in wound healing, where it promotes tissue regeneration and reduces infection risks by acting as an antimicrobial agent. In drug delivery systems, it serves as a carrier for controlled release of pharmaceuticals, enhancing therapeutic efficacy. Additionally, it is utilized in tissue engineering to create scaffolds that support cell growth and repair. In the food industry, it acts as a thickener, stabilizer, and antimicrobial agent to improve texture, extend shelf life, and enhance product safety. Its ability to form hydrogels makes it valuable in cosmetics for moisturizing, skin protection, and reducing irritation. In agriculture, it is used as a seed coating and foliar spray to improve plant growth and resistance to diseases.