Description
Chitosan Oligosaccharide: Advanced Agricultural Biostimulants
What is Chitosan Oligosaccharide (COS)?
Chitosan Oligosaccharide (COS) is a high-performance, natural biopolymer derived from sea-source chitin through advanced enzymatic hydrolysis. Unlike standard chitin, these agricultural-grade formulations are engineered with an optimal molecular size below 1500 Da, ensuring rapid absorption by plant leaves and roots. These eco-friendly stimulants enhance crop immunity, support healthier plant metabolism, and improve overall yields.
Key Features of the COS Series
Each derivative is designed for specific agricultural environments, sharing high-purity standards while offering varied clarity levels for specialized systems:
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Ultra-Low Molecular Weight: All grades (NY, CSY, and SY) feature a weight below 1500 Da for superior bioavailability.
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Exceptional Solubility: These products exhibit excellent solubility, allowing them to dissolve quickly for immediate use.
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High Clarity Solutions: Clarity levels range from 100 to 240, providing clearer solutions and lower turbidity than standard types.
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Physical Properties: The products appear as a uniform, light-yellow powder that is odorless, making them suitable for sensitive greenhouse and indoor environments.
Agricultural Benefits & Applications
Chitosan Oligosaccharide serves as a sustainable alternative to chemical growth regulators and pesticides.
Systemic Benefits
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Immune System Activation: Functions as a natural pathogen defense booster, strengthening resistance to fungal and bacterial infections.
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Growth Promotion: Promotes faster root growth, improves chlorophyll formation, and boosts nutrient uptake efficiency.
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Stress Tolerance: Supports sustainable farming by maintaining soil balance and microbial diversity.
Application Versatility
| Method | Target Use Case |
| Foliar Sprays | Rapid immune activation and chlorophyll enhancement. |
| Hydroponic Systems | High-clarity applications requiring no residue or clogging. |
| Drip Irrigation | Direct soil amendment and root development support. |
| Seed Treatments | Improving germination rates and early-stage plant vigor. |
Frequently Asked Questions (FAQ)
1. What is the difference between the NY-COS, CSY-COS, and SY-COS derivatives?
While all three share an optimal molecular size below 1500 Da, they differ primarily in their clarity levels and intended application focus:
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NY-COS: Offers the highest clarity rating of 240, making it ideal for high-value fruits, vegetables, and the most demanding hydroponic systems.
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SY-COS: Features a clarity level of 180 and is specifically balanced for strong immunity activation and disease resistance enhancement.
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CSY-COS: Features a clarity level of 100 and is designed for general agricultural use, focusing on germination and nutrient uptake.
2. How does the molecular weight affect my crops?
Molecular weight below 1500 Da is critical because it allows the chitosan to be absorbed almost instantly by plant cellular structures. Larger molecules in standard chitosan often remain on the surface, whereas NY-COS, CSY-COS, and SY-COS penetrate systemic pathways to trigger defense mechanisms from within.
3. Is this product safe for organic soil conditioners?
Yes. These formulations are eco-safe, biodegradable, and compatible with organic soil conditioners, fertilizers, and pesticides. They help maintain a healthy soil microbiome while replacing harmful chemical enhancers.

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