Carboxymethyl Chitosan CAS 83512-85-0
Carboxymethyl Chitosan (CMCS, CAS 83512-85-0) is water-soluble amphoteric polysaccharide derived from natural chitosan. It overcomes the poor water solubility of native chitosan. It has good biocompatibility, biodegradability, moisturizing, film-forming, antibacterial and metal chelating properties. Widely applied in cosmetics, wound care, food preservation, agriculture and wastewater treatment. Custom substitution degree & viscosity available.
Viscosity: Customizable low / medium / high viscosity specifications
Solubility: Water-soluble in a wide pH range
Biological properties: Biocompatible & Biodegradable
| Items | Specification |
| Appearance | Powder |
| Drying loss | ≤ 10 - 15% |
| Heavy metals | ≤ 10 ppm |
| pH (1% aqueous solution) | 6.0 – 8.5 |
1. Cosmetics & Personal Care
- Carboxymethyl chitosan has excellent moisturizing and water retention properties, forming a thin and breathable protective film;
- It repairs the barrier, soothes redness, and is suitable for sensitive skin and post-medical treatment products;
- It has antioxidant properties and broad-spectrum antibacterial effects, used in essences, masks, repair lotions, and oral care products.
2. Medicine / Wound Dressings (Medical Materials Customers)
- Promotes epithelial cell growth, accelerates wound healing; stops bleeding, reduces scar formation;
- Carboxymethyl chitosan has antibacterial and anti-infection properties, can be made into hydrogels, medical dressings, and drug sustained-release carriers.
3. Food Preservation & Agriculture
- Edible film-forming preservative agent for food, coating the surface of fruits and vegetables to extend shelf life;
- Inhibits bacteria in plants, chelates heavy metals in the soil, used in foliar fertilizers and soil remediation.
4. Environmental Water Treatment
- Heavy metal chelating and capturing agent, adsorbs heavy metal ions in wastewater;
- Organic flocculant, used for wastewater decolorization and suspended matter sedimentation.
1. Excellent water solubility: Regular chitosan can only dissolve in dilute acids; CMCS can dissolve in both neutral and weakly alkaline conditions, significantly reducing the threshold for formula usage and making it easier for customers to adjust the formula.
2. Natural origin + biodegradable: Modified from shrimp and crab shells, it is green and sustainable, in line with the trends of environmentally friendly and biodegradable materials in Europe and America.
3. Amphoteric ion structure, multi-functional integration: Carboxymethyl chitosan simultaneously contains amino groups and carboxyl groups, possessing multiple functions such as chelating heavy metals, inhibiting bacteria, forming films, moisturizing, and flocculation, making it versatile in one substance.
4. Good biocompatibility, low irritation, suitable for applications in medicine, cosmetics, and food contact scenarios.
5. Customizable specifications: Carboxymethyl chitosan can be adjusted in substitution degree, molecular weight, and viscosity according to customer requirements; it supports small-scale samples to large-scale batch production.
• Standard Packing: 25 kg/bag; 25 kg/drum
• MOQ: to be confirmed by grade and destination
• Lead Time: to be confirmed by order quantity and production schedule
• Shipping: sea / air / express options available
• Store in a cool, dry, and well-ventilated place.
• Keep container tightly closed and protected from moisture.
• Avoid direct sunlight, heat, and open flame.
• Follow SDS guidance for incompatible materials.
