Monopotassium Phosphat CAS：7778-77-0
High Solubility:Monopotassium phosphate (MKP) exhibits high water solubility and dissolves readily in both cold and hot water, while it is practically insoluble in ethanol and most organic solvents. This property enables it to be easily formulated into clear and uniform aqueous solutions for food processing and industrial preparation.
Stable pH Performance:MKP aqueous solution shows a relatively stable pH range with weak acidic characteristics. It maintains good physical and chemical stability at room temperature and under moderate heating. In neutral and alkaline environments, its hydrolysis rate is relatively slow, helping to keep the solution properties stable during storage and application.
Versatile Uses:In the food industry, MKP is widely used as a pH buffer, nutrient fortifier, emulsification auxiliary, and quality improvement agent. It can help regulate acidity, enhance food stability, improve processing performance, and extend the shelf life of certain food products.
Crystalline Form & Hygroscopic Nature:This product appears as a white crystalline powder or fine granular solid. It is odorless, food-grade, and has slight hygroscopicity. Its uniform crystal form makes it convenient for accurate weighing, standardized batching, packaging, and warehouse storage management.
Monopotassium phosphate (MKP, KH₂PO₄) is an odorless white crystalline salt with excellent water solubility. It delivers high phosphorus and potassium nutrition without chloride. It works widely as a foliar fertilizer and fertigation raw material to boost blooming, fruit setting and crop stress resistance. Food & industrial grades are also available for pH buffering, fermentation and microbial culture.
| Chemical Formula | KH₂PO₄ |
| CAS No. | 7778-77-0 |
| Appearance | White crystalline powder or fine granules, odorless |
| Melting Point | 252.6 °C (decomposes on melting) |
| Density | 2.34 g/cm³ (25 °C) |
| pH (1% aqueous solution, 20 °C) | 4.3–4.7 (weakly acidic) |
| Solubility | 22.6 g per 100 mL water at 20 °C; freely soluble in hot water; insoluble in ethanol |
| Hygroscopicity | Slight |
| Storage Condition | Sealed and kept dry, below 30 °C, away from moisture |
| Assay / Nutrient Grade | ≥99.0% (food & industrial grade); 0-52-34 grade: P₂O₅ ≥52%, K₂O ≥34%, chloride-free |
Monopotassium phosphate (MKP) serves as a high-efficiency phosphorus-potassium additive. In agricultural applications, it is used for fruits, vegetables, flowers and cash crops to promote bud differentiation, boost fruit development, improve sugar content and enhance plant resistance to cold and drought. It can chelate metal ions in the soil and nutrient solution to avoid nutrient precipitation. In addition, it is also adopted as a pH buffering agent in food processing, fermentation auxiliary, culture medium raw material, water treatment reagent and additive for electroplating and ceramic industries.
