CAS · 7778-77-0
Product Overview
Potassium dihydrogen phosphate丨7778-77-0, also known as monopotassium phosphate (MKP), is an inorganic compound composed of potassium (K), phosphorus (P), and oxygen (O). It is a water-soluble salt that plays a significant role in a variety of applications, including fertilizers, food additives, and industrial processes.
Product Specifications
| Property | Value |
|---|---|
| Grade | USP36 |
| Appearance | Colourless or white crystals |
| Identification A,B | Conform |
| Content | 98.0% ~ 100.5% |
| Arsenic | 0.0003% max |
| Lead | 0.0005% max |
| Heavy metals (Pb) | 0.002% max |
| Limit of fluoride | 0.001% max |
| Water Insoluble substances | 0.2% max |
| Loss on drying | 1.0% max |
Applications
1.Fertilizers
Agriculture: Potassium dihydrogen phosphate is widely used as a fertilizer in agriculture. It is a source of both potassium (K) and phosphorus (P), which are essential nutrients for plant growth. It is often used in hydroponic systems and fertigation, where the soluble form of the compound ensures rapid nutrient uptake by plants.
Balanced Nutrient Supply: In addition to promoting strong root development, flower and fruit production, potassium dihydrogen phosphate also improves overall plant health and resistance to disease. Its low acidity makes it suitable for a wide range of crops, especially fruit-bearing plants.
2.Food Industry
Food Additive: Potassium dihydrogen phosphate丨7778-77-0 is used as a food additive (E340) for various purposes, including as a phosphorylating agent in food products. It acts as a stabilizer in processed foods and beverages, and it can also be used to adjust the acidity in certain products.
Acidulant: It helps regulate the pH of dairy products, fruit juices, and soft drinks. It is also used in some cheese-making processes to maintain the consistency and texture of the cheese by controlling acidity.
Nutritional Supplement: Potassium is an essential mineral for human health, and potassium dihydrogen phosphate is used in some food products as a source of this mineral.
3.Water Treatment
Corrosion Inhibitor: Potassium dihydrogen phosphate丨7778-77-0 is used in water treatment applications as a corrosion inhibitor for pipes and water systems. Its ability to adjust the pH of water makes it useful in maintaining water quality and reducing the risk of corrosion in systems that handle water, especially in industrial settings.
Buffering Agent: It is also used as a buffering agent to maintain a consistent pH in various water treatment processes, particularly where the pH of the water needs to be kept within a specific range to prevent chemical imbalances.
4.Pharmaceuticals and Laboratory Use
Buffer Solution: Potassium dihydrogen phosphate丨7778-77-0 is commonly used in buffer solutions in laboratories, especially in applications that require a stable and controlled pH environment. It is often used in conjunction with disodium hydrogen phosphate (Na₂HPO₄) to create phosphate buffers for biological and chemical research.
Pharmaceutical Formulations: It can be found in some pharmaceutical formulations, where it is used to adjust pH or act as a source of potassium in medicinal products. This is especially useful in oral medications or injectables that need to maintain a particular pH for stability and efficacy.
5.Horticulture and Gardening
Plant Nutrition: In addition to its use in large-scale agriculture, potassium dihydrogen phosphate is also used in gardening and horticulture. It promotes strong, healthy plants by providing necessary nutrients that improve root growth, flowering, and fruiting.
Hydroponic Systems: Potassium dihydrogen phosphate is widely utilized in hydroponics and aquaponics systems as a key ingredient in nutrient solutions for growing plants in water without soil. Its solubility makes it ideal for delivering potassium and phosphorus directly to the plant roots.
6.Industrial Applications
Surface Treatment: Potassium dihydrogen phosphate is used in surface treatment processes such as cleaning and etching of metals. The compound helps in adjusting the pH of solutions used for cleaning and can also act as a precursor in the preparation of other phosphate-based chemicals.
Manufacturing of Glass and Ceramics: In some specialized industrial applications, potassium dihydrogen phosphate is used in the manufacture of glass and ceramics, where it acts as a fluxing agent to improve the melting properties of materials.
Benefits
● Nutrient-Rich for Plants: As a fertilizer, it provides essential nutrients that are directly absorbed by plants, promoting better growth, flowering, and fruit development. The potassium content helps in photosynthesis, water regulation, and disease resistance, while the phosphorus is crucial for root development and overall plant health.
● Water-Soluble: Its high solubility in water makes it ideal for liquid fertilizers, hydroponics, and fertigation, ensuring that plants get an immediate supply of the nutrients they need.
● Versatile pH Buffer: The compound's ability to adjust and stabilize pH makes it highly valuable in various industries, from food processing to pharmaceuticals and laboratory applications.
● Corrosion Resistance: In industrial water systems, it helps prevent the corrosion of pipes and machinery, extending the lifespan of equipment.
● Safe and Widely Used: Potassium dihydrogen phosphate丨7778-77-0 is regarded as a safe substance in food and agriculture when used according to regulatory guidelines. It is approved by several food safety organizations for use as a food additive and is classified as non-toxic in standard industrial and agricultural settings.
Conclusion
Potassium dihydrogen phosphate丨7778-77-0 is a highly versatile and valuable compound used across a wide range of industries, including agriculture, food, pharmaceuticals, water treatment, and industrial manufacturing. Its key benefits stem from its role as a potassium and phosphorus source, its pH buffering ability, and its water solubility, making it an ideal choice in fertilizers, food processing, and other applications where stability and nutrient balance are important. Given its extensive use and beneficial properties, potassium dihydrogen phosphate is an essential compound in various fields.
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