PRODUCT
COS - Chitosan Oligosaccharide
A premium plant biostimulant derived from natural chitin;
Enhances natural crop defense, stimulates growth, and maximizes yields.
Chitosan Oligosaccharide (COS) – High-Purity Plant Biostimulant
MacroAlga Chitosan Oligosaccharide is a premium enzymatic plant biostimulant with 93.4% purity, DP3–7 ≥ 80%, and an average molecular weight of 800 Da. Widely used as a plant vaccine, COS enhances crop immunity, promotes growth, and improves stress tolerance in foliar and soil applications. Trusted by formulators in more than 30 countries.
- 93.4% assay verified by SGS – higher than industry average (88–90%)
- DP3–7 oligosaccharides ≥ 80% for superior bioactivity
- Light yellow powder with excellent solubility and clarity
- Proprietary acetic-process enzyme technology – stable under pH 1–14
- China’s largest COS production capacity: 500 tons/year
Technical Specifications of Chitosan Oligosaccharide
| Parameter | Specification |
|---|---|
| Appearance | Light Yellow Powder |
| Odor | Slight acetic acid odor |
| Chitosan Oligosaccharide Content, % | 93.4 |
| DP3–7 Oligosaccharide Content, % | 81.2 |
| Degree of Deacetylation, % | 90.2 |
| Molecular Weight, Da | 800 |
| Moisture, % | 5.8 |
| Ash Content, % | 1.2 |
| pH Value (1% solution) | 5.6 |
| Insoluble Matter, % | ≤ 0.01 |
Advantages of MacroAlga Enzymatic Chitosan Oligosaccharide
- Acetic Acid Process: Produces the smallest anion with mild acidity and full volatility—ideal for high-grade COS formulations.
- Higher Purity: 93.4% assay (SGS tested), outperforming the industry average of 88–90%.
- Optimal DP Range: DP3–7 ≥ 80% ensures maximum plant elicitor activity.
- Low Molecular Weight: ~800 Da enables rapid absorption through leaf cuticles and root systems.
- Wide pH Stability: Stable across pH 1–14, compatible with most agrochemical tank mixes.
Key Benefits & Applications
- Boost Plant Immunity: Induces systemic acquired resistance (SAR).
- Promote Growth: Stimulates root development and nutrient uptake.
- Improve Stress Tolerance: Mitigates abiotic stress from drought, salinity, and extreme temperatures.
- Enhance Soil Health: Supports beneficial microbial activity in the rhizosphere.
Recommended Dosage
- Soil / Root Application: 400–500 g/ha
- Foliar Spray: Dilute 20,000–30,000 times
About MacroAlga – Leading Biostimulant Manufacturer in China
Qingdao MacroAlga Co., Ltd. is a technology commercialization enterprise founded by the Qingdao Institute of Bioenergy and Bioprocess Technology (CAS). We specialize in enzymatic biostimulant raw materials and hold core patents in oligosaccharide degradation and enzyme production.
Our products are exported to over 30 countries across North America, Europe, Latin America, Asia, and Africa.
- Enzymatic Seaweed Extract – 10,000 tons/year
- Alginate Oligosaccharide Powder – 300 tons/year
- Chitosan Oligosaccharide Powder – 500 tons/year
- Protein Hydrolysate (Chicken-derived Peptide) – 1,000 tons/year
