Potassium sulfate
Potassium sulfate
Potassium sulfate (SOP)
| Product Name: | Sulfate of Potash, SOP |
| Category: | Potassium Fertilizer |
| Chemical Formula: | K₂SO₄ |
| Potassium (K₂O): | 50.0–53.0% |
| Sulfur (as S): | 18.0–19.0% |
| Appearance: | White to off-white granules or fine crystalline powder |
| Specification: | 50kg per bag or customized |
| Payment Terms: | T/T, L/C, cash(USD, EUR, RMB) |
| Certificate: | ISO 22241-1, ISO 9001 standard. |
Potassium sulfate (SOP) Description
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Risso SOP Key Benefits
High Potassium Content (50–53% K₂O)
Promotes flowering, fruit sizing, sugar accumulation, and overall crop vigor.Available Sulfur (18–19% S)
Essential for protein formation, enzyme activity, and enhancing flavor and shelf life.Chloride-Free Formula
Specifically formulated for chloride-sensitive crops such as grapes, potatoes, citrus, leafy vegetables, and tobacco.Low Salt Index (~0.85)
Safe for fertigation, hydroponics, and saline soils. Reduces risk of root burn and salt buildup.Fully Water-Soluble Grades Available
Ideal for use in drip irrigation systems, greenhouse production, and foliar applications.Certified for Organic Agriculture
Risso SOP is available in OMRI- and CDFA-listed grades for use in organic farming systems.
Risso SOP Technical Specifications
| Parameter | Typical Value |
|---|---|
| Brand Name | Risso |
| Product Name | Potassium Sulfate (Sulfate of Potash, SOP) |
| Chemical Formula | K₂SO₄ |
| Potassium (K₂O) | 50.0–53.0% |
| Sulfur (S) | 18.0–19.0% |
| Chloride (Cl⁻) | ≤ 0.5% (low-chloride grades ≤ 0.05%) |
| Moisture Content | ≤ 0.5% |
| pH (5% solution) | 7.0–9.0 (neutral to slightly alkaline) |
| Solubility in Water | 110 g/L at 20 °C |
| Salt Index | ~0.85 |
| Appearance | White to off-white granules or fine crystalline powder |
| Particle Size | Granular (SGN 240–320), fine powder, or water-soluble |
Application Guidelines
| Crop Type | Recommended Rate | Application Method |
|---|---|---|
| Orchards (Citrus, Mango) | 200–400 kg/ha | Broadcast or fertigation |
| Vegetables (Tomato, Lettuce) | 150–250 kg/ha | Drip irrigation or top dress |
| Vineyards, Berries | 130–400 kg/ha | Surface or fertigated |
| Potatoes, Tobacco | 180–350 kg/ha | Pre-plant or split apply |
| Turfgrass, Ornamentals | 5–10 g/m² | Granular or foliar spray |
| Greenhouse Crops | 1–2 g/L solution | Fertigation / hydroponics |
Always base fertilizer use on recent soil and tissue analysis to maximize efficiency and crop response. Recommended for These Crops
Risso Potassium Sulfate is particularly suited for:
Fruits: grapes, apples, strawberries, melons, bananas
Vegetables: leafy greens, tomatoes, peppers, carrots
Tubers: potatoes, sweet potatoes
Tobacco and tea crops
Nuts and citrus trees
Turfgrass and ornamental plants
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Storage: Store in a cool, dry, well-ventilated area, away from rain and humidity.
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Transportation: Handle carefully to avoid damage. Do not mix or transport with toxic substances.
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Packaging: Minor moisture or slight heating at the bag opening is normal and does not affect the product’s effectiveness.
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Production Date: Clearly indicated on the certificate of conformity or packaging.
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How to Choose the Right Potassium Sulfate (SOP)
Check Crop Sensitivity
Choose SOP if your crops are chloride-sensitive (e.g., grapes, potatoes, leafy greens).Consider Purity
Look for low-chloride content (≤0.5%) and high K₂O (≥50%) for best results.Select the Right Grade
Use granular SOP for soil application and water-soluble SOP for fertigation or foliar spray.Match Application Method
SOP is ideal for drip irrigation, greenhouse use, and saline soils due to its low salt index.Check for Certifications
For organic farming, choose SOP with OMRI or CDFA certification.
Choose Risso SOP for premium quality, high purity, and optimal crop performance.
