Chitosan & Chitosan Oligosaccharide
Water-soluble chitosan oligosaccharide (COS) with DP2–10 content ≥ 80% — a natural plant biostimulant produced by enzymatic degradation, available in powder grades (85%–98%) and liquid formulations.
What is COS
A signal molecule from the sea
Why COS
Four properties that matter in the field
Natural & Biodegradable
Sourced from marine crustacean shells.
High Bioactivity
DP2–10 oligomers ≥ 80%, the bioactive range for crop uptake; monosaccharide content < 0.5% (PG3/PG4).
Excellent Compatibility
Stable and applicable across pH 2–14; suitable for blending with most fertilizers and foliar programs.
Low Use Rate
Typical foliar rate 10–25 g/ha for powder.
How it works
Mode of action
Plant defense elicitor
Activates natural innate immunity (PTI), helping plants better withstand biotic stress.
Abiotic stress response
Supports crop performance under cold, heat and drought stress conditions.
Root & germination
Supports root development, germination potential and seedling establishment.
Fertilizer synergist
Improves nutrient use efficiency when blended into foliar, drip and compound fertilizers.
Soil & residue
Supports a beneficial soil microbial environment and induces plant P450 enzyme activity involved in the natural degradation of chemical residues.
Product Portfolio
Powder grades & liquid formulations
| Form | Grade | Assay | Positioning |
|---|---|---|---|
| Powder | Food grade | 95%–98% | Food & nutraceutical applications (MW 300–1,500 Da) |
| Pharmaceutical grade | 95%–98% | MW < 1,000 Da, on request | |
| Agricultural grade (PG3 / PG4 / PG5) | 85%–94% | Ag biostimulant & blending — see specification table | |
| Liquid | LY1 – LY4 | 5%–18% | Liquid formulations for foliar / fertigation programs |
Specification — Powder
Agricultural grades PG3 · PG4 · PG5
| Item | PG3 (Premium Ag) | PG4 (Standard Ag) | PG5 (Economy Ag) |
|---|---|---|---|
| Appearance | Yellow-brown powder | Yellow-brown powder | Yellow-brown powder |
| Assay (content) | 92%–94% | 90%–92% | 85%–90% |
| Molecular weight (Da) | 1,000–3,000 | 1,000–3,000 | 1,000–3,000 |
| DP2–10 content | ≥ 80% | ≥ 80% | ≥ 80% |
| Monosaccharide content | < 0.5% | < 0.5% | — |
| Water solubility | 98%–100% | 97%–100% | 97%–100% |
| Particle size | 80–100 mesh | 80–100 mesh | 100 mesh |
| Moisture | ≤ 10% | ≤ 10% | ≤ 10% |
| Ash | ≤ 1% | ≤ 1% | ≤ 1% |
| pH (1% solution) | 4–7 | 5–7 | 5–7 |
| As / Pb / Hg (ppm) | < 10 each | < 10 each | < 10 each |
| Heavy metal (as Pb) | ≤ 10 ppm | ≤ 10 ppm | ≤ 10 ppm |
Specification — Liquid
Liquid grades LY1 – LY4
| Item | LY1 | LY2 | LY3 | LY4 |
|---|---|---|---|---|
| Appearance | Brown liquid | Brown liquid | Brown liquid | Brown liquid |
| Assay (content) | 15%–18% | 12%–14% | 8%–10% | 5%–8% |
| Molecular weight (Da) | 2,000–5,000 | 2,000–5,000 | 2,000–5,000 | 2,000–5,000 |
| Ash | ≤ 1% | ≤ 1% | ≤ 1% | ≤ 1% |
| pH | 4–7 | 4–7 | 4–7 | 4–7 |
Application Guide
Suggested use rates
Rates are for reference; adjust according to crop, growth stage and local agronomic practice.
Foliar application
| Crop group | Powder (foliar) | Liquid (foliar) | Method |
|---|---|---|---|
| Rice / Wheat / Sorghum | 10–20 g/ha | 100–250 mL/ha | Foliar spray |
| Corn / Cotton / Peanut | 15–20 g/ha | 150–300 mL/ha | Foliar spray |
| Fruit trees | 20–25 g/ha | 225–500 mL/ha | Foliar spray |
| Vegetables | 15–20 g/ha | 150–300 mL/ha | Foliar spray |
Blending application
| Blending application | Recommended dosage |
|---|---|
| Seed coating | 0.5%–3% of coating formulation |
| Foliar fertilizer blending | 20–50 g per MT of fertilizer |
| Root flush / drip irrigation | 30–100 g per MT |
| Compound fertilizer | 20–60 g per MT |
| Macro-element NPK | 2–10 g per MT |
Packing & Shipping
Packed for export
PG1 / PG2 (food & pharmaceutical grade) specifications and quotations are available on request.
| Form | Packing | Container loading |
|---|---|---|
| Powder | 1 kg bag / 25 kg bag or fiber drum with inner liner | 11 MT / 20′ FCL (drums); 9 MT / 20′ FCL (palletized) |
| Liquid | 1000 L / 200 L / 20 L drum; 5 L (4/carton); 1 L (20/carton) | 20,000 L / 20′ FCL |
