Foliar Formulations
Low-molecular-weight COS for evaluation in foliar biostimulant formulations intended to support plant response and nutrient utilization.
Learn moreCSY-COS
Chitosan Oligosaccharide (Agricultural Grade – CSY-COS)
High-Purity, Low-Molecular-Weight Chitosan Oligosaccharide for Agricultural Formulations
Chitosan Oligosaccharide (CSY-COS) is a high-purity, light yellow, water-soluble biopolymer derived from natural chitosan through enzymatic hydrolysis. Designed specifically for agricultural use, it serves as an eco-friendly biostimulant, plant immune enhancer, and natural growth promoter.
With a molecular weight below 1500 Da, this product offers excellent solubility and clarity (100), ensuring fast absorption by plant leaves and roots. It effectively improves seed germination, enhances nutrient uptake, and strengthens resistance to fungal and bacterial infections.
Chitosan Oligosaccharide CSY-COS supports sustainable farming practices by replacing harmful chemical fertilizers and pesticides. It is suitable for use in foliar sprays, drip irrigation, seed treatment, and soil amendment formulations.
MOQ: 25 g sample (Free Shipping) | 1 kg (15% tariff + $60 FedEx shipping) | Bulk packs available. For larger orders, contact (steve@chitosanglobal.com)
Synonyms: CSY-COS,
Chitosan Oligosaccharide,
Chitosan Oligosaccharide Powder,
Agricultural Grade Chitosan Oligosaccharide,
Agricultural COS,
Low-Molecular-Weight Chitosan Oligosaccharide,
Water-Soluble Chitosan Oligosaccharide,
Chitooligosaccharide,
COS Biostimulant,
Plant-Grade Chitosan Oligosaccharide,
Agricultural Biostimulant COS,
Low-Turbidity Chitosan Oligosaccharide
- Product identity
- Chitosan oligosaccharide
- Grade/type
- CSY-Agriculture
- Appearance
- Light yellow powder
- Odor
- Odorless
- Content/purity
- ≥90%
Properties
| Property | Value | Test method | Note |
|---|---|---|---|
| Product identity | Chitosan oligosaccharide | Supplier identification method | Batch-specific COA |
| Grade/type | CSY-Agriculture | Supplier classification | Agricultural grade |
| Appearance | Light yellow powder | Visual inspection | COA result: Pass |
| Odor | Odorless | Organoleptic inspection | COA result: Pass |
| Content/purity | ≥90% | Supplier analytical method | Batch result: 96.25% |
| Average molecular weight | <1500 Da | Supplier molecular-weight method | Batch result: 966 Da |
| Convertible glucosamine | ≥60% | Supplier analytical method | Batch result: 79.86% |
| Monosaccharide | ≤0.5% | Supplier analytical method | Batch result: 0.12% |
| Degree of deacetylation | ≥85% | Supplier DAC method | Batch result: 90.15% |
| Moisture | ≤10.0% | Supplier moisture test | Batch result: 2.59% |
| Particle size | 100 mesh | Sieve analysis | Batch result: 100 mesh |
| Ash content | ≤2.0% | Supplier ash test | Batch result: 0.46% |
| Insoluble matter | ≤0.5% | Supplier insoluble-matter test | Batch result: 0.1% |
| pH | 4.5–7.0 | 1% aqueous solution | Batch result: 5.33 |
| Turbidity | ≤100 | Supplier turbidity method | Batch result: 3.89 |
| Solution absorbance | Supplier reference procedure | 1.5 g COS in 50 mL water, tested at 486 nm | Batch result: 0.186 |
| Lead (Pb) | ≤2 mg/kg | Supplier heavy-metal test | Not detected |
| Arsenic (As) | ≤1 mg/kg | Supplier heavy-metal test | Not detected |
| Mercury (Hg) | ≤1 mg/kg | Supplier heavy-metal test | Not detected |
| Escherichia coli | Negative | Supplier microbiological method | Batch result: Negative |
| Batch number | CSY2025082004 | Batch traceability record | Current COA batch |
| Production date | August 20, 2025 | Supplier COA | Batch-specific |
| Expiration date | August 19, 2027 | Supplier COA | Subject to recommended storage |
| Quality conclusion | Qualified | Supplier quality review | Batch approved |
Packaging & Quality
| Item | Detail |
|---|---|
| Standard pack size | Standard commercial pack: 1 kg |
| Bulk availability | Bulk commercial quantities are available through a custom quotation. |
| Production-lot quantity | The documented manufacturing-lot quantity is 1500 kg. This is not the retail pack size. |
| Packaging | Supplied in sealed, moisture-resistant packaging suitable for powdered agricultural ingredients. |
| Certificate of Analysis | Batch-specific COA available for CSY-COS batch CSY2025082004. |
| Quality status | The documented batch was inspected and classified as qualified. |
| Purity control | Minimum content specification: 90%; documented result: 96.25%. |
| Microbiological control | Escherichia coli result: Negative. |
| Heavy-metal control | Lead, arsenic, and mercury were not detected under the supplier’s analytical procedures. |
| Batch traceability | Production date: August 20, 2025; expiration date: August 19, 2027. |
| Manufacturer | Qingdao Yuda Century Economy and Trade Co., Ltd., Qingdao, China |
| Source verification | Shellfish or sea-source status requires a supplier source declaration and allergen statement. |
Product Overview
Applications
Hydroponic Systems
May be evaluated in hydroponic systems where low turbidity, water compatibility, and controlled insoluble matter are important.
Learn moreFertigation and Drip Irrigation
Suitable for experimental fertigation and drip-irrigation formulations, subject to filtration and compatibility testing.
Learn moreSeed Treatment
May be evaluated in seed-treatment and coating formulations intended to support germination and early plant establishment.
Learn moreRoot-Zone Formulations
Suitable for experimental root-zone applications targeting root development and nutrient-use efficiency.
Learn morePlant-Defense Research
May be evaluated as a chitosan-based elicitor in plant-defense and crop-response research. Crop-specific validation is required.
Learn moreGreenhouse Agriculture
Intended for evaluation in greenhouse, hydroponic, and controlled-environment crop systems.
Learn moreSoil-Amendment Formulations
May be evaluated as a functional ingredient in experimental soil and agricultural biological-input formulations.
Learn moreDirections for Use
Add the required quantity gradually to clean water while stirring until evenly dispersed or dissolved. Begin with a small laboratory, greenhouse, or field trial. Determine the final concentration according to crop, growth stage, application method, water quality, and environmental conditions. Before combining with fertilizers, micronutrients, pesticides, or other agricultural inputs, conduct tank-mix, precipitation, filtration, stability, and phytotoxicity testing.
Storage and Handling
Store in the original tightly sealed container in a cool, dry, and well-ventilated location. Protect from moisture, direct sunlight, excessive heat, and contamination. Use clean, dry equipment when dispensing. Keep the package sealed when not in use. Follow the storage conditions stated in the current Safety Data Sheet and batch-specific Certificate of Analysis.
Safety Information
- Signal Word
- Refer to the current product-specific Safety Data Sheet.
- Hazard Classification
- No verified GHS hazard classification is stated in the supplied Certificate of Analysis. Consult the current CSY-COS Safety Data Sheet before handling.
- Hazard Codes
- Refer to the current product-specific SDS for applicable hazard statements and codes.
- Precautionary Statements
- Avoid generating or inhaling airborne powder. Avoid contact with eyes and prolonged contact with skin. Wear suitable protective gloves and safety glasses during handling. Use appropriate respiratory protection when dust may be generated. Wash hands thoroughly after handling. Consult the current product-specific Safety Data Sheet before use.
- Storage Class
- Dry powdered agricultural ingredient; confirm the official storage class from the current product-specific SDS.
Protocols and Articles
CSY-COS Agricultural Grade Chitosan Oligosaccharide
Product specifications, agricultural applications, quality information, packaging, and ordering.
Chitosan in Agriculture
Educational overview of chitosan-based materials in agricultural formulations.
Chitosan for Plant Defense and Crop Protection Systems
Information about chitosan as an elicitor and plant-defense formulation ingredient.
Chitosan for Seed Coating
Information about chitosan-based seed-treatment and coating research.
Frequently Asked Questions
What is CSY-COS?
CSY-COS is an agricultural-grade chitosan oligosaccharide powder with a documented molecular weight below 1500 Da and batch purity of 96.25%.
What is its molecular weight?
The specification is below 1500 Da. The documented batch result is 966 Da.
What is its purity?
The minimum content specification is 90%. The documented batch result is 96.25%.
Is CSY-COS water-soluble?
It is described as water-soluble. The batch contains 0.1% insoluble matter against a maximum specification of 0.5%.
What is its degree of deacetylation?
The minimum specification is 85%. The documented batch result is 90.15%.
What is the pH?
The specified pH range is 4.5–7.0 for a 1% aqueous solution. The batch result is 5.33.
What is the turbidity?
The maximum specification is 100. The documented batch result is 3.89.
Can it be evaluated in hydroponics?
Its low molecular weight and low turbidity support evaluation in hydroponic formulations, subject to compatibility testing.
Can it be used as a foliar spray?
It may be evaluated in foliar formulations. Concentration should be established through crop-specific trials.
Can it be mixed with fertilizers or pesticides?
Compatibility must be confirmed through tank-mix, precipitation, stability, filtration, and phytotoxicity testing.
Were heavy metals detected?
Lead, arsenic, and mercury were not detected under the supplier’s analytical procedures.
Was E. coli detected?
No. The documented Escherichia coli result was negative.
Is CSY-COS shellfish-derived?
The price table states Shellfish, but the COA does not identify the biological source. Supplier documentation is required.
Is CSY-COS food grade?
No food-grade certification is provided. The COA classifies it as Agricultural Grade.
What is the minimum order quantity?
The standard minimum order quantity is one 1 kg pack.
What is the shelf life?
This batch was produced on August 20, 2025 and expires on August 19, 2027.
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