High-Concentration Liquid Potassium Phosphite provides highly soluble potassium and phosphorus (in phosphite form) tailored for agricultural input manufacturers, fertilizer formulators, distributors, and bulk importers.
Product Specifications
|
Parameter |
Specification & Technical Data |
Procurement Notes |
|
Product Name |
Liquid Potassium Phosphite |
Concentrated technical grade |
|
Physical Appearance |
Clear to light blue/green liquid |
Free of precipitation or visible impurities |
|
Chemical Form |
Potassium (K2O) & Phosphite (P2O5 eq.) |
Phosphorus present exclusively as phosphite (PO3) |
|
Common Grades |
0-28-26, 0-40-20, or custom solutions |
Confirm required grade prior to order |
|
Potassium Content (K2O) |
20% - 30% w/v (or 15% - 22% w/w) |
Specify reporting basis (w/v vs w/w) |
|
Phosphite Content (P2O5 Eq.) |
25% - 40% w/v (or 18% - 30% w/w) |
Measured as P2O5 equivalent |
|
Water Solubility |
100% fully miscible |
Fully compatible with liquid dosing systems |
|
PH (1% Solution) |
6.5 - 7.5 |
Neutral range for enhanced crop safety |
|
Density (20 deg C) |
1.40 - 1.55 g/cm3 |
Crucial for volume-to-mass conversions |
|
Insoluble Matter |
Less than 0.1% |
Prevents clogging in fertigation emitters |
|
Heavy Metals |
Pb < 10 ppm, As < 5 ppm, Cd < 5 ppm |
Meets international agricultural safety limits |
|
Packaging Options |
200L Drums, 1000L IBC Totes, Flexitanks |
Bulk packaging optimized for export shipping |
Technical Overview & Distinction
Nutrient Classification
Phosphite phosphorus is evaluated under distinct technical standards.
Formulation Behavior
Phosphites require specific pH balancing and compatibility testing during blending.
Regulatory Status
Many jurisdictions enforce distinct registration routes for phosphite-containing inputs.
Value Drivers in Bulk Procurement
Logistical Efficiency: Higher active concentrations reduce shipment volumes, directly lowering freight costs per unit of active nutrient, container utilization fees, and packaging overhead.
Economic Comparison: B2B buyers should evaluate quotations based on the cost per kilogram of active nutrients (K2O + active Phosphite) rather than total liquid weight.
Application Versatility: Suitable as a concentrated raw material for secondary liquid blending, high-volume foliar programs, and automated drip irrigation.
Application Protocols
Foliar Application: Fully soluble for rapid tank mixing. Perform a jar test before blending with secondary micronutrients or crop protection products.
Fertigation & Drip Irrigation: Low insoluble content (<0.1%) protects irrigation equipment from emitter blockage and scale accumulation.
Liquid Formulation: Functions as a stable potassium and phosphite source in liquid fertilizer manufacturing.
Quality Control & Supplier Qualification Checklist
Guaranteed Analysis: Declared nutrient limits with clear units of measure (% w/w or % w/v).
Physical Baseline: Verified density range, solution pH, and maximum insoluble limits.
Safety Compliance: Updated Safety Data Sheet (SDS) and storage compatibility guidelines.
Traceability: Representative Certificate of Analysis (CoA) linked to specific production batches.
Regulatory Alignment: Compliance documentation tailored to destination markets (e.g., Regulation (EU) 2019/1009 regarding phosphonates in European markets).
FAQ
Q: How do I accurately convert between weight (% w/w) and volume (% w/v) concentrations?
A: To convert weight percentage to volume percentage, multiply the weight percentage by the liquid density (e.g., 20% w/w multiplied by a density of 1.45 g/cm3 equals 29% w/v). Always confirm which unit convention your supplier uses before comparing commercial quotes.
Q: Can liquid potassium phosphite be directly substituted for potassium phosphate in liquid formulations?
A: No. Phosphite (PO3) and phosphate (PO4) have different chemical structures and metabolic characteristics. Replacing phosphate with phosphite will alter the chemical dynamics, target performance, and regulatory status of your final product.
Q: Why is density verification essential for bulk commercial orders?
A: Liquid fertilizers are frequently purchased by weight (metric tons) but metered or applied by volume (liters). An accurate density measurement allows precise calculation of active nutrient delivery, dosing rates, tank capacity planning, and shipping payload limits.
Q: What compatibility precautions should be taken before tank-mixing?
A: Although highly soluble, concentrated potassium phosphite should be tested prior to large-scale blending. Always conduct a standard jar test with target water, fertilizers, and active inputs to verify that no precipitation, phase separation, or temperature spikes occur.
Q: What is the typical shelf life and storage requirement for bulk liquid potassium phosphite?
A: When stored in original, sealed containers at temperatures between 5 deg C and 35 deg C away from direct sunlight, the product maintains stability for up to 24 months. Prevent freezing conditions to avoid potential crystallization.
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