Shandong Huashang Chemical Co., Ltd. is a high-tech enterprise focused on industry of fine chemicals research and develop, produce and sale. Shandong Huashang Chemical Co., Ltd. is located in Shan Dong Ji Nan China. we have the ability to provide you high quality products. More than 90 % of our products are exported to developed countries and regions such as north America, Europe, Japan, South Korea and the Middle East.
1. Basic Information
Name: Chitosan
Alias: Poly-β-(1→4)-2-amino-2-deoxy-D-glucose, Deacetylated chitin
CAS No.: 9012-76-4
Repeating Unit Molecular Formula: C6H11O4N1
Molecular Weight: Variable, range from tens of thousands to millions
2. Physical and Chemical Properties
Physical Properties
- Appearance: Off-white to pale beige crystalline powder
- Odor: Odorless, slight characteristic seafood faint smell
- Solubility: Insoluble in water, neutral & alkaline solvents; soluble in dilute organic acids such as acetic acid, lactic acid; insoluble in ethanol, acetone, oils
- Hygroscopicity: Moderately hygroscopic
- Particle property: Porous fine powder with strong adsorption capacity
Chemical Properties
- Molecular Structure: Linear polysaccharide polymer; repeating C6H11O4N1 glucosamine units connected by β-1,4 glycosidic bonds, containing amino groups and hydroxyl groups
- Acid solubility characteristic: Amino groups protonate in dilute acid to form soluble chitosan ammonium salt; precipitates out when pH rises above neutral
- Chelating performance: Amino and hydroxyl groups can chelate heavy metal ions like Pb, Cu, Fe
- Film-forming property: Forms transparent, antibacterial biodegradable film after acid dissolving and drying
- Thermal stability: Stable below 100 °C; above 180 °C thermal degradation, molecular chain breaks
- Photostability: Slightly sensitive to strong UV light; long-term illumination reduces viscosity
- Compatibility: Compatible with weak acid, protein, plant extracts; incompatible with strong alkali, high concentration oxidants, anionic surfactants
3. Main Application Fields
1. Food Additive (Core Application)
- Natural preservative & fresh-keeping coating agent for fruits, vegetables, seafood and meat
- Clarifying agent for wine, vinegar and fruit juice; fat binding auxiliary for functional food
2. Medical & Biomedical Raw Material
- Wound dressing material, hemostatic agent, antibacterial medical membrane
- Carrier for sustained-release oral drugs, microcapsule embedding material
3. Cosmetic Raw Material
- Moisturizer, antibacterial additive for facial mask, lotion, shampoo
- Film-forming agent for hair care to improve hair smoothness
4. Environmental Water Treatment
Heavy metal chelating flocculant for industrial wastewater; sludge dewatering agent
4. Quality Specification Table
| Test Item | Standard Index |
| CAS Number | 9012-76-4 |
| Repeating Unit Formula | C6H11O4N1 |
| Appearance | Off-white fine powder |
| Degree of Deacetylation | Food/Medical Grade ≥85% |
| Viscosity | Low/Medium/High viscosity series optional |
| Water Content (KF) | ≤10.0% |
| Residue on Ignition | ≤1.0% |
| Heavy Metals (Pb) | ≤10 ppm |
| Arsenic (As) | ≤2 ppm |
| Packaging | 25kg PE lined fiber drum |
| Storage Condition | Hermetic cool dry warehouse below 25 °C; isolate alkaline substances and strong oxidants |
| Transportation Requirement | Non-dangerous goods, moisture-proof sealed packaging |
| Shelf Life | 36 months under intact sealed packaging |
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