Water-Soluble Potassium Sulfate Powder is a high-purity potassium and sulfur raw material based on potassium sulfate (K2SO4), supplied in fine powder form for soluble fertilizer production, fertigation, and technical agricultural formulations.
Technical Specifications
|
Parameter |
Guaranteed Specification |
Typical Batch Value |
Test Method |
|
K2O Content |
>= 52.0% |
52.3% |
ISO 17318 / ICP-OES |
|
Sulfur (S) |
>= 18.0% |
18.2% |
Gravimetric |
|
Chloride (Cl-) |
<= 1.0% (Low-Cl grade <= 0.5%) |
0.3% |
Titration / IC |
|
Water Solubility (20 deg C) |
Fully Soluble (~110 g/L) |
Rapid Dissolution |
Lab Dissolution Test |
|
Water-Insoluble Matter |
<= 0.1% |
0.03% |
Gravimetric |
|
Moisture |
<= 0.5% |
0.2% |
Oven Drying (105 deg C) |
|
pH (1% Solution) |
5.0 - 7.0 |
6.1 |
pH Meter |
|
Appearance |
White Powder |
Crystalline White Powder |
Visual |
Why Physical Form & Dissolution Matter
Before integrating a new SOP supplier into your production line, evaluate the material under your specific process conditions:
Hard water or low-temperature dissolution tanks
Micro-filtration mesh sizes (<= 100 mesh)
Interactions with calcium, magnesium, or phosphate salts
Resistance to caking under humid conditions
Key Applications
Water-Soluble Fertilizer Manufacturing: Premium potassium and sulfur source for water-soluble NPK/PK blends, ideal for salt-sensitive crops.
Advanced Fertigation Systems: Formulated for drip irrigation, pivot systems, and micro-sprinklers without clogging emitters.
Commercial Greenhouse & Horticulture: Critical for high-value fruits, vegetables, flowers, and nurseries requiring precise EC/pH management.
NPK and PK Blending: High compatibility with ammonium phosphates, urea, and micronutrients.
Potassium Sulfate (K2SO4) vs. Potassium Chloride (KCl)
|
Consideration |
Potassium Sulfate (SOP) |
Potassium Chloride (MOP) |
|
Chemical Formula |
K2SO4 |
KCl |
|
K2O Content |
>= 52% |
>= 60% |
|
Sulfur Contribution |
Yes (18% S min) |
None |
|
Chloride Impact |
Very Low (<= 0.5% - 1.0%) |
High (~47% Cl) |
|
Crop Safety |
High (Safe for chloride-sensitive crops) |
Risk of toxicity in sensitive crops |
|
Fertigation Suitability |
Excellent |
Limited in high-salinity soils |
Quality Assurance & Verification
Every shipment undergoes a strict Quality Control workflow prior to release:
Raw Material Audit -> Crystallization Control -> Milling & Sieving -> Lab Sampling -> COA Verification -> Sealed Packaging -> Batch Traceability
Documentation Available Upon Request:
- Technical Data Sheet (TDS)
- Safety Data Sheet (SDS) - GHS Compliant
- Batch-Specific Certificate of Analysis (COA)
- Certificate of Origin (COO)
- ISO 9001:2015 Quality Management Certificate
- Heavy Metal & Contaminant Test Reports
Packaging, Storage & Logistics
Standard Options
25 kg PP/PE woven bags, 500 kg jumbo bags, 1000 kg jumbo bags with moisture-proof inner liners.
Customization
OEM private label printing, palletized with stretch wrapping and corner boards.
Storage
Store in a cool, dry, well-ventilated warehouse. Keep bags sealed to prevent moisture absorption and caking.
FAQ
Q: What does 52% K2O mean?
A: K2O (Potassium Oxide) is the standard unit used in the fertilizer industry to express potassium concentration. A 52% K2O rating corresponds to approximately 43% elemental potassium (K).
Q: Is this grade suitable for fine drip-irrigation systems?
A: Yes. With water-insoluble matter controlled below 0.1%, this powder dissolves rapidly and completely, making it safe for drip emitters and micro-sprinklers.
Q: How do you ensure batch-to-batch consistency?
A: Our production line utilizes automated process controls and continuous lab sampling. Every batch is tested via ICP-OES and Ion Chromatography before releasing the COA.
Q: Can I request samples for lab testing?
A: Yes. We supply 500g - 1kg verification samples for laboratory analysis, dissolution testing, and trial formulation.
Q: How should I compare two 52% K2O suppliers?
A: Compare the complete specification rather than K2O alone. Check sulfur content, chloride levels, solubility rate, water-insoluble matter, moisture, particle size, batch consistency, documentation, packaging quality, and delivered cost.
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