Potassium Fulvate is a 100% water-soluble, high-purity potassium salt of fulvic acid extracted from premium leonardite through a proprietary low-temperature alkaline extraction and purification process. It appears as a fine brown to dark-brown powder with exceptionally high fulvic acid content (≥ 85% on dry basis) and elevated natural potassium levels (10–13% as K₂O).
- Product Name: Potassium Fulvate
- Chemical Nature: Potassium salt of fulvic acid derived from leonardite or other natural humified organic matter.
1. Physical and Chemical Properties
| Property | Specification / Typical Value | Test Method |
|---|---|---|
| Appearance | Brown to dark brown free-flowing powder or flakes | Visual |
| Odor | Slight characteristic earthy odor | Organoleptic |
| Solubility in water (20 °C) | ≥ 99 % (completely soluble) | Internal |
| pH (1 % solution in distilled water) | 8.5 – 10.5 | pH meter |
| Fulvic acid content (dry basis) | ≥ 85 % (typically 90–95 %) | ISO 19822 / HPTA |
| Potassium (K₂O) content (dry basis) | 10 – 13 % | ICP-OES / Flame photometry |
| Total humic substances (dry basis) | ≥ 90 % | ISO 19822 |
| Moisture content | ≤ 10 % (typically 5–8 %) | Oven drying 105 °C |
| Ash content | ≤ 10 % | 550 °C muffle furnace |
| Heavy metals (Pb) | ≤ 10 mg/kg | ICP-MS |
| Heavy metals (Cd) | ≤ 2 mg/kg | ICP-MS |
| Heavy metals (As) | ≤ 5 mg/kg | ICP-MS |
| Heavy metals (Hg) | ≤ 1 mg/kg | ICP-MS |
| Particle size (through 100 mesh) | ≥ 95 % | Sieving |
| Bulk density | 0.55 – 0.75 g/cm³ | Graduated cylinder |
2. Functional Characteristics
- Extremely high cation exchange capacity (CEC): 800–1400 meq/100 g
- Excellent chelating ability for micronutrients (Fe, Zn, Mn, Cu, etc.)
- Improves nutrient uptake and translocation in plants
- Enhances soil structure, water retention, and microbial activity
- Bio-stimulant and anti-stress agent for crops
3. Applications
- Foliar fertilizers
- Water-soluble NPK formulations
- Soil conditioners and organic fertilizers
- Seed treatment and root dipping
- Hydroponics and fertigation systems
- Turf and ornamental plant nutrition
4. Recommended Dosage
| Application Method | Dosage (per hectare or per 1000 L water) |
|---|---|
| Foliar spray | 200–500 g/ha (0.02–0.05 % solution) |
| Drip irrigation/fertigation | 1–3 kg/ha (split applications) |
| Soil application | 5–20 kg/ha (mixed with base fertilizer) |
| Seed treatment | 0.5–2 kg per 100 kg seed |
5. Compatibility
Compatible with most water-soluble fertilizers, most pesticides, and plant growth regulators. Jar test recommended before large-scale tank mixing with strong alkaline or highly acidic products.
6. Packaging
- 25 kg multi-layer kraft bags with inner PE liner
- 500 kg or 1000 kg big bags
- Custom packaging available upon request
7. Storage Conditions
- Store in a cool, dry, well-ventilated area away from direct sunlight and moisture.
- Keep containers tightly closed when not in use.
- Shelf life: minimum 5 years under recommended storage conditions.
8. Safety and Handling
- Non-toxic, non-hazardous, non-flammable
- Dust may cause mechanical irritation to eyes and respiratory tract
- Use dust mask, safety goggles, and gloves during handling
- In case of eye contact: rinse immediately with plenty of water
- Not classified as dangerous goods under IATA, IMDG, or ADR regulations