Carboxymethyl chitosan has several applications in various fields:
1. **Pharmaceuticals**: It's used in drug delivery systems, enhancing the solubility and bioavailability of poorly soluble drugs. It also has potential in wound healing due to its biocompatibility.
2. **Food Industry**: Carboxymethyl chitosan acts as a food preservative and can be used to create edible coatings for fruits and vegetables, helping to extend their shelf life.
3. **Agriculture**: It serves as a biostimulant and can promote plant growth, improve nutrient uptake, and enhance resistance to diseases.
4. **Cosmetics**: Its moisturizing properties make it suitable for use in skincare products, helping to hydrate and improve skin texture.
5. **Environmental Applications**: It can be used in water treatment to remove heavy metals and pollutants due to its adsorptive properties.