Compacted Potassium Sulfate Granules, commonly known as Sulfate of Potash (SOP, K2SO4), deliver high-purity potassium and essential sulfur with low chloride content. Formulated for agricultural distributors, bulk fertilizer blenders, and high-value crop growers, our compacted granules offer high physical strength, low dust levels, and consistent field performance.
Technical Specifications
|
Parameter |
Guaranteed Specification |
Testing / Compliance Standard |
|
Product Name |
Compacted Potassium Sulfate Granules |
Commercial Grade / Agricultural Use |
|
Chemical Formula |
K2SO4 |
ISO 9001 Quality Managed |
|
Potassium Content (K2O) |
>= 50% |
AOAC / ISO Standard Methods |
|
Sulfur (S) |
>= 17% |
ISO Standard Methods |
|
Chloride (Cl-) |
<= 1.5% (Custom low-Cl available) |
AgNO3 Titration / Ion Chromatography |
|
Moisture Content |
<= 1.0% |
Laboratory Moisture Analyzer |
|
Particle Size Distribution |
2.0 mm - 4.0 mm (>= 90%) |
Sieve Analysis |
|
Granule Crushing Strength |
>= 25 N / granule |
Mechanical Hardness Tester |
|
Bulk Density |
Approx. 1.1 - 1.3 g/cm3 |
ISO Standard Methods |
|
Water Solubility |
Fully soluble according to SOP specs |
Standard Dissolution Test |
|
Packaging |
25 kg PP/PE bags, or 500 kg / 1000 kg Jumbo Bags with PE inner liner |
UN / ISO Packaging Standards |
Physical Granule Quality & Supply Chain Durability
Size Uniformity & Blending: Controlled particle size distribution matches standard NPK blend components (such as Urea and DAP) to prevent segregation during transit and spreading.
Granule Integrity & Dust Control: High crushing strength (>= 25 N) minimizes abrasion, breakdown, and dust generation during conveyer handling and spread calibration.
Moisture Protection & Anti-Caking: Packaging includes heavy-duty PE inner liners inside PP woven bags to protect against humidity during long-distance ocean shipments and extended storage.
Application Guidelines
Direct Field Spreading: Controlled particle sizing enables precise spread pattern calibration on modern broadcast equipment.
Bulk Dry Blending: Compatible physical density and particle size reduce component separation in custom NPK formulation blends.
Specialty Crop Nutrition: Provides essential potassium and sulfur for chloride-sensitive crops, high-salinity soils, and premium horticultural nutrition programs.
Procurement Priorities by Buyer Role
Direct Field Application Distributors: Focus on particle size distribution, low dust content, and mechanical spreading width consistency.
Bulk Fertilizer Blenders: Prioritize granule strength, bulk density matching, low moisture, and physical blending compatibility.
Specialty Crop Producers: Focus on low chloride limits, guaranteed K2O and sulfur levels, and water solubility.
Importers & Trading Houses: Prioritize REACH/ISO compliance, batch COA consistency, packaging integrity, lead times, and landed cost.
FAQ
Q: What is the primary advantage of Compacted Granular SOP over standard powder or standard MOP?
A: Compacted SOP provides a high-concentration source of potassium and sulfur while keeping chloride levels exceptionally low, making it safe for chloride-sensitive crops. The granular format offers higher mechanical strength, lower dust, and improved handling compared to powder, ensuring even spreading and stable bulk blending.
Q: How do you prevent caking during long-distance sea freight?
A: Moisture control is critical. We strictly limit the initial product moisture content to <= 1.0% and utilize heavy-duty PP woven bags fitted with PE inner liners. This barrier protects the granules against ambient humidity and temperature fluctuations during ocean transit.
Q: Is this product suitable for bulk dry blending with other fertilizers like Urea or DAP?
A: Yes. The particle size distribution (2.0–4.0 mm) and bulk density are designed to align with common bulk blending materials, helping prevent particle segregation during conveying, transport, and field application.
Q: What compliance and quality documentation can be provided before placing an order?
A: We provide complete documentation packages including Product Specification Sheets, batch-specific Certificates of Analysis (COA), Safety Data Sheets (SDS), ISO/REACH compliance documentation, Certificate of Origin, and packaging/loading photo inspection reports.
Q: Can you customize the particle size or chloride limits based on our specific market requirements?
A: Yes. While our standard grade features a 2.0–4.0 mm particle size and <= 1.5% chloride content, customized specifications (such as stricter chloride limits or specific mesh size ranges) can be produced upon agreement prior to order confirmation.
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