Potassium dihydrogen phosphate


Product name: Potassium dihydrogen phosphate (KDP),  Monopotassium phosphate (MPK)
Molecular formula: KH2PO4 
Molecular weight:  136.086
CAS NO.: 7778-77-0
Properties and uses: Potassium dihydrogen phosphate (KDP), also known as monopotassium phosphate (MPK), is a chemical compound with the chemical formula KH2PO4. It is a white, crystalline powder that is highly soluble in water. Potassium dihydrogen phosphate is a type of salt and is often used for various purposes in both the laboratory and industry.

KDP is very soluble in water, which makes it suitable for preparing aqueous solutions of varying concentrations. It is commonly used as a buffering agent in chemistry and biology laboratories. It helps to maintain a stable pH level in a solution. In agriculture, potassium dihydrogen phosphate is used as a source of potassium and phosphate for plants. It provides essential nutrients that promote plant growth. KDP is used as a food additive in some processed foods to regulate acidity and act as a leavening agent in baking. It can also be used in pharmaceuticals as an excipient in tablet formulations. Potassium dihydrogen phosphate is often used in analytical chemistry for the preparation of various reagents and standard solutions. KDP is renowned for its use in growing single crystals for various applications, such as nonlinear optics and electro-optics. It is a vital material for devices like frequency-doubling crystals and electro-optic modulators.

Overall, potassium dihydrogen phosphate is a versatile compound with a range of applications in science, industry, and agriculture. Its properties make it valuable for maintaining pH levels, providing essential nutrients for plants, and contributing to various chemical processes.

Standard: HG/T4511-2013


IndicatorsUnitFirst-class productSecond -class product
Appearance/White or colorless crystals
Potassium nitrate≥%99.099.0
phosphorus pentoxide≥%51.551.5
potassium oxide≥%34.034.0
pH value10G/L4.4-4.84.4-4.8
Moisture content≤%0.20.2
Heavy metals (calculated by lead)≤%0.0050.001
Water insoluble matter≤%0.10.1
Solubility (at 22 ℃)g/L240.0
Soluble salt concentration (1 g/L 20℃)mS/cm0.835



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