Monopotassium Phosphate (MKP)
Product Overview:
Identification of Substance: potassium dihydrogen phosphate
CAS #: 7778-77-0
Monopotassium phosphate (MKP) is a highly soluble, chloride-free source of phosphorus and potassium used across fertilizer, food, and fire protection applications. It is commonly employed in foliar feeding and fertigation programs, delivering rapid nutrient uptake for phosphorus- and potassium-demanding crop growth stages such as flowering and fruiting. Additionally, it serves as a food additive for buffering and nutrient fortification in processed food and beverage products. MKP is also utilized as a component in fire extinguisher powder formulations due to its flame-suppressing chemistry. Furthermore, it finds applications in hydroponic and specialty crop nutrition programs requiring a pure, chloride-free nutrient source.
Relevant identified uses:
Food additive
Fertilizer
Specialty cements
Documentation:
Technical Information:
Purity
99.0 % min.
Appearance
white crystalline powder
Total Nitrogen (N)
≥ 20.8 %
Phosphorous [P]
22.60 % min.
Phosphorus Pentoxide (as P2O5)
≥ 52.00 % min.
Potassium [K]
28.60 % min.
Potassium Oxide [K2O]
34.00 % min.
pH of 1% Solution
4.3 – 4.7
Moisture
0.10 % max.
Arsenic [As]
50.0 ppm, max
Chloride [Cl]
0.025 % max.
Water Insoluble material
0.01 % max.
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