Monopotassium Phosphate – Water-Soluble Phosphate Salt for Fertilizers and Industrial Applications
Introduction
Monopotassium Phosphate (MKP), also known as Potassium Dihydrogen Phosphate or Monobasic Potassium Phosphate, is an inorganic salt with the chemical formula KH₂PO₄. It is typically supplied as a white crystalline powder or granules and is highly soluble in water. It provides both potassium and phosphorus, two essential nutrients widely used in agricultural fertilizers. Monopotassium Phosphate is valued for its high nutrient content, low chloride content, and suitability for preparing water-soluble fertilizer solutions. Depending on its grade and purity, it is also used in food processing, laboratory applications, and selected industrial formulations.
Industrial Applications
- Agricultural Fertilizers: Used in water-soluble fertilizers to supply potassium and phosphorus for plant growth and crop development.
- Fertigation Systems: Suitable for delivering nutrients through irrigation systems when the product grade and water quality are appropriate.
- Hydroponics: Used in nutrient solutions for hydroponic cultivation and controlled-environment agriculture.
- Food Processing: Food-grade material may be used as a buffering agent or source of potassium and phosphate in approved food applications.
- Laboratory Applications: Used in the preparation of phosphate buffer solutions and analytical procedures.
- Industrial Formulations: Applied in selected chemical processes and formulations requiring a soluble potassium phosphate salt.
Key Benefits
- Supplies potassium and phosphorus in a water-soluble form.
- Suitable for fertigation and hydroponic nutrient formulations.
- Low chloride content compared with many chloride-based potassium fertilizers.
- Supports flexible nutrient management in agricultural systems.
- Can help regulate pH in suitable phosphate buffer formulations.
- Available in agricultural, food, and technical grades according to application requirements.
Product Specifications
| Specification | Details |
|---|---|
| Product Name | Monopotassium Phosphate |
| Abbreviation | MKP |
| Alternative Names | Potassium Dihydrogen Phosphate, Monobasic Potassium Phosphate |
| Chemical Formula | KH₂PO₄ |
| CAS Number | 7778-77-0 |
| Molecular Weight | 136.09 g/mol |
| Appearance | White crystalline powder or granules |
| Solubility | Soluble in water |
| Chemical Classification | Inorganic potassium phosphate salt |
| Typical Fertilizer Grade | 0-52-34 (N-P₂O₅-K₂O), where applicable |
| Primary Function | Source of potassium and phosphorus; buffering agent in suitable applications |
| Main Applications | Fertilizers, fertigation, hydroponics, food processing, laboratory use |
| Purity | Grade-dependent |
| Packaging | Moisture-resistant bags or other suitable sealed packaging |
Note: The fertilizer grade 0-52-34 is a common commercial designation and may vary by supplier. Confirm assay, water solubility, moisture, insoluble matter, and nutrient content through the supplier's Technical Data Sheet (TDS) and Certificate of Analysis (COA). Food applications require an appropriate food-grade product and compliance with applicable regulations.
Storage and Handling
Monopotassium Phosphate is generally stable under normal storage conditions. However, the product should be protected from moisture and contamination to maintain its quality and free-flowing characteristics.
Store in tightly closed, clearly labeled packaging in a cool, dry, well-ventilated area. Keep the material away from excessive humidity and incompatible substances identified in the supplier's SDS. Avoid creating or inhaling dust during handling, and use appropriate gloves and eye protection according to workplace procedures. For fertilizer applications, follow the supplier's recommendations for dissolution, compatibility with other nutrients, and irrigation-system use. Do not combine concentrated fertilizer solutions without checking compatibility, as precipitation may occur with certain calcium-containing products. Follow the applicable SDS and local requirements for handling and disposal.
Quality and Supply
Monopotassium Phosphate should be sourced from a reliable supplier that provides grade-specific technical documentation. Before ordering, confirm the required grade, purity, nutrient analysis, solubility, packaging size, and intended application. For agricultural use, verify the declared phosphorus and potassium content and ensure the material is suitable for the intended fertigation or hydroponic system. For food or laboratory applications, confirm the required purity and applicable regulatory standards. Review the COA for batch-specific quality parameters and the SDS for handling guidance.
Conclusion
Monopotassium Phosphate is a versatile, water-soluble potassium and phosphate salt used extensively in fertilizers, fertigation, hydroponics, and selected food and industrial applications. Its nutrient composition and solubility make it useful for precise nutrient delivery and specialized chemical formulations. Selecting the correct grade and following suitable storage, handling, and application practices helps support product quality and reliable performance. Contact a qualified supplier to discuss availability, nutrient specifications, purity grades, packaging options, and technical documentation for your requirements.
