Sulfate of Potash (SOP / K₂SO₄)

Description

1. Product Overview
Sulfate of Potash (SOP) is a premium, chlorine-free potassium fertilizer containing 50–53% K₂O and 17–18% sulfur, essential for high-value crop production. Its primary industrial use is in fertigation, foliar spraying, and granular blending for chloride-sensitive crops such as tobacco, potatoes, citrus, nuts, and vegetables. The key value proposition is superior crop quality—higher fruit solids, improved color, longer shelf life—without the harmful chloride found in MOP. Strategically, SOP is critical for global food security and premium agricultural exports, as it directly enhances yield value per hectare while reducing soil salinity risks.

2. Key Specifications & Technical Characteristics

• Chemical composition: K₂SO₄ (minimum 99% purity on dry basis); K₂O: 50–53%; Sulfur (S): 17–18%; Chloride (Cl): ≤1.5% (low-chloride grade available ≤0.5%)

• Purity grade: Agricultural grade (standard) / Water-soluble grade (for fertigation/foliar) / Technical grade (industrial)

• Physical characteristics:

  • White or off-white crystalline powder (water-soluble) or white granular (bulk blend)

  • Particle size (granular): 2–4 mm (90% within range)

  • Bulk density: 1,100–1,300 kg/m³

  • Free-flowing, anti-caking treated

• Packaging options: 25 kg / 50 kg laminated PP/PE bags; 1,000–1,200 kg jumbo bags; bulk in container liners

• Shelf life: 36 months in dry, covered warehouse; no degradation if stored away from moisture and incompatible materials

3. Core Industrial Applications

• High-value cash crops (fruits, vegetables, nuts, tobacco, tea, coffee): SOP delivers higher brix (sugars), uniform ripening, and extended post-harvest life. Outperforms MOP where chloride causes leaf burn, root damage, or reduced fruit quality.

• Controlled environment agriculture (greenhouses, hydroponics): Water-soluble SOP is essential for closed irrigation systems due to zero chloride residue and full solubility (>99.9%).

• Blended NPK production: Granular SOP provides mechanical strength and particle size compatibility with urea, DAP, and MAP, reducing segregation in bulk blends.

• Specialty crops (potatoes, onions, garlic, peppers): Sulfur content improves protein synthesis and pungency/flavor profiles. SOP’s low salt index minimizes osmotic stress in sensitive root zones.

• Industrial applications (glass, pharmaceuticals, food additives): Technical-grade SOP used as a fluxing agent, potassium source for fermentation (e.g., soy sauce), and nutrient media.

Cost advantage: While priced higher than MOP, SOP’s yield quality premium (often +15–30% farm-gate value) and reduced soil salinity management costs make it commercially superior for export-oriented agriculture.

4. Competitive Advantages

• Quality consistency: ISO 22000 / FAMI-QS certified. Every batch tested for Cl⁻, heavy metals (Pb, Cd, As ≤ 2 ppm), and solubility. Lot traceability via blockchain-ready batch codes.

• Supply reliability: Direct source from high-grade brine and sulfate mineral deposits with captive power and multiple production lines (Mannheim process). Average on-time delivery (OTD) >96% over 24 months.

• Logistics capability: Dedicated warehouse network in Rotterdam, Houston, Shanghai, and Jebel Ali. Break-bulk and containerized shipping with real-time vessel tracking.

• Price competitiveness: Long-term fixed-volume contracts (quarterly pricing) and spot pricing for ≤5,000 MT. Hedging optional for 12+ months.

• Sustainability: Zero liquid discharge production in select units; low-carbon SOP available with verified Scope 3 data. Compatible with organic farming (OCI-certified grades).

• Technical support: Agronomist-led recommendation engine, custom blending calculator, and COA generation within 2 hours of request.

5. Commercial & Supply Information

• Minimum order quantity (MOQ): 20 metric tons (MT) – equivalent to one full 20-ft container (flexible trial orders of 5 MT upon credit approval)

• Loading capacity (MT per container):

  • 20-ft dry container: 20–22 MT (palletized or bulk bags)

  • 40-ft dry container: 25–26 MT (max weight limit)

  • Bulk vessel (handysize): 5,000–10,000 MT per shipment

  • Container liner (20-ft): 24 MT (specialized liner bags)

• Incoterms supported: EXW, FOB, CIF, CFR (major global ports)

• Lead time (ex-works): 7–15 days for standard grade; 20–25 days for water-soluble grade