Technical Grade Monopotassium Phosphate (MKP) is a high-purity, crystalline inorganic phosphate with the chemical formula KH2PO4 and CAS No. 7778-77-0.
MKP 0-52-34 provides phosphorus and potassium in a single, fully water-soluble material without nitrogen. It is widely used as a premium raw material for water-soluble fertilizers, liquid NPK formulations, fertigation, hydroponics, and targeted industrial applications.
|
Parameter |
Specification / Details |
|
Product Name |
Technical Grade Monopotassium Phosphate |
|
Common Names |
MKP, Potassium Dihydrogen Phosphate, Potassium Phosphate Monobasic |
|
Chemical Formula |
KH2PO4 |
|
CAS No. |
7778-77-0 |
|
Molecular Weight |
136.09 g/mol |
|
Fertilizer Analysis |
0-52-34 (N-P2O5-K2O) |
|
Total Nitrogen (N) |
0.0% |
|
Phosphorus (P2O5) |
>= 51.8% (Typical: 52.0%) |
|
Potassium (K2O) |
>= 34.0% (Typical: 34.2%) |
|
Appearance |
White or colorless crystalline powder / crystals |
|
Water Solubility |
Fully soluble (226 g/L at 20 deg C) |
Technical Specification
|
Parameter |
Standard Technical Grade |
High-Purity / Hydroponic Grade |
Testing Method |
|
KH2PO4 Assay |
>= 99.0% |
>= 99.5% |
Titration |
|
P2O5 Content |
>= 51.8% |
>= 52.0% |
Gravimetric / Spectrophotometry |
|
K2O Content |
>= 34.0% |
>= 34.2% |
Flame Photometry / Titration |
|
PH (1% Aqueous Solution) |
4.3 - 4.7 |
4.3 - 4.7 |
pH Meter |
|
Water-Insoluble Matter |
<= 0.10% |
<= 0.05% |
Gravimetric |
|
Moisture / Loss on Drying |
<= 0.20% |
<= 0.15% |
Oven / Karl Fischer |
|
Chloride (Cl-) |
<= 0.05% |
<= 0.02% |
Ion Chromatography |
|
Iron (Fe) |
<= 20 ppm |
<= 10 ppm |
AAS / ICP-OES |
|
Arsenic (As) |
<= 10 ppm |
<= 3 ppm |
ICP-OES |
|
Heavy Metals (as Pb) |
<= 10 ppm |
<= 5 ppm |
ICP-OES |
|
Particle Size |
20-80 Mesh (Custom mesh available) |
Custom |
Sieve Analysis |
Application and Specification Matching
|
Application |
Key Parameters to Review |
Application Considerations |
|
Water-Soluble Fertilizers |
P2O5, K2O, Assay, Solubility |
Check salt index and dry blending moisture compatibility. |
|
Fertigation Systems |
Water-Insoluble Matter, Dissolution Rate |
Low insolubles (<= 0.05%) prevent drip nozzle clogging. |
|
Foliar Sprays |
Purity, pH, Chloride, Heavy Metals |
Low biuret and heavy metal levels avoid leaf scorch. |
|
Hydroponic Nutrients |
Heavy Metals, Fe, Cl, Water Insolubles |
High-purity grade required to prevent nutrient lockup. |
|
Industrial Processing |
Assay (>= 99.5%), Buffer Capacity |
Strict purity for chemical synthesis, buffering, or metal treatment. |
International Compliance and Quality Standards
ISO Quality Systems
ISO 9001:2015 (Quality Management) and ISO 14001:2015 (Environmental Management).
EU REACH Compliance
Fully registered for bulk import into the European Union market.
GHS Safety Documentation
Standard Safety Data Sheets (SDS) provided according to global GHS criteria.
Packaging Options and Logistics Data
|
Packaging Type |
Packaging Specifications |
Palletization |
Loading Capacity (20ft FCL) |
|
25 kg Woven Bag |
PP Bag with PE Inner Liner |
Palletized & Shrink-Wrapped |
24-25 MT (Palletized) / 27 MT (Loose) |
|
50 lb Paper Bag |
Multi-wall Kraft Paper |
Palletized & Shrink-Wrapped |
22-24 MT |
|
1000 kg Jumbo Bag |
Heavy-duty PP Big Bag |
Palletized |
20-22 MT |
|
1200 kg Jumbo Bag |
Heavy-duty PP Big Bag |
Palletized |
24 MT |
FAQ
Q: What is the difference between Technical Grade and Food Grade MKP?
A: Technical Grade MKP is designed for agriculture and industrial applications. Food Grade MKP undergoes additional purification steps and must strictly comply with food chemical codes (FCC) regarding heavy metals (As, Pb, Cd, Hg).
Q: Can MKP be mixed with Calcium Nitrate in fertigation stock solutions?
A: No. MKP (a phosphate source) should not be mixed directly with Calcium Nitrate or Magnesium Nitrate in concentrated stock tanks (Tank A/B systems), as insoluble calcium phosphate precipitates will form.
Q: How do you prevent MKP from caking during long-distance ocean transit?
A: We use heat-sealed PE inner liners in all bags to block ambient humidity. Additionally, thermal desiccant bags are placed inside shipping containers, and anti-caking additives can be incorporated upon request.
Q: What parameters should I evaluate before buying Technical Grade MKP?
A: Key parameters include KH2PO4 assay, P2O5, K2O, pH, moisture content, water-insoluble matter, heavy metal limits (As, Pb, Fe), and particle size distribution matching your production equipment.
Q: Can I request a batch-specific COA and custom packaging before placing a bulk order?
A: Yes. Every shipment is accompanied by a batch-specific Certificate of Analysis (COA). Custom packaging, custom bag labeling, and specific mesh sizes can be arranged prior to order confirmation.
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