Ultrafine Soluble Potassium Sulfate Powder ($K_2SO_4$) is a high-purity, fine-particle potassium and sulfur fertilizer. It is specifically processed for rapid dissolution in liquid fertilizer formulations, precision fertigation, and high-value crop nutrition programs.
This product is ideal for applications requiring targeted potassium ($K_2O$) and sulfur ($S$) supplementation without adding nitrogen or excessive chloride.
Key Product Identifiers
|
Product Type |
Water-Soluble Potassium Fertilizer |
|
Chemical Name |
Potassium Sulfate |
|
Chemical Formula |
K2SO4 |
|
CAS Number |
7778-80-5 |
|
Common Name |
Sulfate of Potash (SOP) |
|
Physical Form |
Ultrafine Powder |
|
Primary Nutrients |
Potassium (K2O) and Sulfur (S) |
|
Main Applications |
Drip Fertigation, Water-Soluble NPK Blending, Greenhouse Hydroponics, Foliar Spray |
Typical Technical Specifications
|
Parameter |
Purchasing Consideration |
Typical Specification (Reference) |
|
K2O Content |
Guaranteed potassium concentration |
>= 51.0% |
|
Sulfur (S) Content |
Elemental sulfur contribution |
>= 17.5% (or >= 43.5% as SO3) |
|
Chloride (Cl-) |
Maximum acceptable limit |
<= 1.0% (Ultra-low Cl available) |
|
Moisture Content |
Prevents caking and preserves flowability |
<= 0.3% |
|
Insoluble Matter |
Maximum permitted residue in solution |
<= 0.1% |
|
PH (1% Solution) |
Solution acidity level |
5.0 - 7.0 |
|
Particle Size |
Powder fineness and dissolution speed |
95% - 98% passing 200 mesh (75 microns) |
|
Appearance |
Visual quality inspection |
White, free-flowing powder |
Key Product Benefits
Nitrogen-Free Nutrient Source: Supplies concentrated potassium and sulfur in a single compound, allowing formulators to increase potassium levels late in the crop cycle without risking nitrogen over-application.
Chloride Management for Sensitive Crops: Virtually free of chloride compared to Potassium Chloride (MOP), making it essential for chloride-sensitive crops (e.g., berries, fruits, tobacco, grapes, greenhouse crops) and saline soils.
Rapid Dissolution Performance: The ultrafine particle size increases surface area, significantly reducing mechanical mixing time and batch dissolution effort in tanks.
Primary Applications
Fertigation & Micro-Irrigation: Suitable for drip irrigation, pivot systems, and greenhouse hydroponics. Excellent solubility and minimal insoluble residue protect emitters from clogging.
Water-Soluble Fertilizer (WSF) Manufacturing: Serves as a premium raw material for dry-powder blending and liquid high-grade water-soluble NPK fertilizers.
Greenhouse & Horticultural Crop Nutrition: Designed for precision farming where crop nutrient ratios require exact balance.
Foliar Spray Formulations: Rapidly absorbed through leaves to correct potassium deficiencies during critical growth stages like fruit filling.
Quality Control & Compliance
Our quality management protocols ensure strict batch-to-batch consistency:
Raw Material Inspection: Strict incoming screening for heavy metals, moisture, and chloride content.
Particle-Size Control: Standardized milling and screening to guarantee specified mesh compliance.
Solubility & Residue Testing: Laboratory validation of dissolution speed and total insoluble solids prior to batch release.
Certifications & Compliance: Manufactured under ISO 9001:2015 quality standards. REACH registration, OMRI/Organic compliance documentation, and Heavy Metal Statements are available upon request.
Packaging, Storage, and Logistics
Packaging Options: 25 kg woven/PE bags, 500 kg jumbo bags, or 1,000 kg bulk bags with moisture-proof inner liners. Custom OEM packaging available.
Storage Recommendations: Store in a cool, dry, well-ventilated warehouse. Keep bags sealed until use to prevent ambient moisture absorption and caking
Documentation Provided: Technical Data Sheet (TDS), Safety Data Sheet (SDS), Certificate of Analysis (COA), Certificate of Origin (COO), and Bill of Lading (B/L).
FAQ
Q: What is the main advantage of using Soluble SOP over Potassium Chloride (MOP)?
A: Soluble SOP provides potassium and sulfur without introducing chloride. This is critical for chloride-sensitive crops and prevents soil salinity buildup while delivering an essential secondary macronutrient (sulfur).
Q: Will Ultrafine Soluble SOP clog drip irrigation nozzles or emitters?
A: No, provided it is properly dissolved. Our product maintains an insoluble matter level of <= 0.1%, ensuring clear solution preparation that protects emitters and micro-nozzles from mechanical blockages.
Q: Can Potassium Sulfate be mixed directly with Calcium Nitrate in the same tank?
A: Caution is required. Sulfate ions can react with calcium ions to form insoluble calcium sulfate (gypsum) precipitates. We recommend using separate stock tanks (Tank A and Tank B system) or conducting a jar test before large-scale mixing.
Q: How does fine particle size impact fertilizer manufacturing?
A: The ultrafine particle size increases the total surface area exposed to water, drastically accelerating dissolution rates and improving homogeneity when dry-blending into water-soluble NPK formulas.
Q: What technical documentation is included with bulk shipments?
A: Every commercial batch is supplied with a Certificate of Analysis (COA) matching actual laboratory test results against target specifications. Technical Data Sheets (TDS) and Safety Data Sheets (SDS) are provided upon initial inquiry or sample evaluation.
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