Carboxymethyl chitosan is a water-soluble derivative of chitosan, valued for its biocompatibility, biodegradability, and antimicrobial properties. It is widely used in the biomedical field for wound healing, promoting tissue regeneration, and in drug delivery systems as a carrier for controlled release of medications, enhancing their stability and efficacy. In cosmetics, it offers moisturizing and skin-soothing effects. In agriculture, it functions as a growth enhancer and provides protection against pathogens. In the food industry, it acts as a viscosity enhancer and preservative to extend product shelf life. Its water-soluble nature also makes it ideal for wastewater treatment to remove heavy metals and organic pollutants.