Monopotassium Phosphate

Key Specifications and Properties

• Molecular Formula: KH₂PO₄

• Molecular Weight: 136.09 g/mol

• Appearance: White crystalline powder or granules

• Purity: ≥99.0% (technical grade); ≥99.7% (food/pharma grade)

• Solubility: Freely soluble in water (≥225 g/100 mL at 20°C); insoluble in ethanol

• Density: 2.34 g/cm³

• pH (1% aqueous solution): 4.4–4.7

• Loss on Drying: ≤1.0% (at 105°C)

• Heavy Metals: ≤10 ppm (as Pb)

• Storage: Cool, dry, well-ventilated area; protect from humidity to maintain free-flowing properties

  
  

These features ensure monopotassium phosphate CAS No. 7778-77-0 performs consistently in aqueous systems and long-term storage.

Applications Across Industries

Monopotassium phosphate CAS No. 7778-77-0 supports nutrient delivery and process control across multiple sectors:

• Agriculture and Fertilizers: High-potassium (28%) and phosphorus (22%) content ideal for fruiting and flowering crops; used in fertigation and foliar sprays to boost root development and disease resistance without nitrogen overload.

  
  

• Food and Beverages: Serves as an acidity regulator, sequestrant, and leavening agent in baked goods, soft drinks, and meat products; enhances stability in canned goods, approved as GRAS (E340(i)).

  
  

• Pharmaceuticals: Acts as a buffering agent in oral rinses, syrups, and electrolyte solutions; contributes to phosphorus supplementation in nutritional therapies.

  
  

• Water Treatment: Functions as a scale inhibitor and pH adjuster in cooling towers and boilers, preventing mineral deposits and corrosion.

  
  

• Fire Safety and Industrial: Incorporated into dry chemical fire extinguishers as an effective flame suppressant; used in metal surface treatments for phosphate conversion coatings.

  
  

By prioritizing MKP, industries can minimize environmental impact through efficient nutrient use and reduced runoff.

Benefits of Choosing Monopotassium Phosphate CAS No. 7778-77-0

• Nutrient Efficiency: Provides balanced K and P ions for immediate uptake, improving crop yields by up to 20% in phosphorus-deficient soils.

  
  

• pH Control: Mild acidity enables precise adjustments in acidic formulations without excessive sourness or precipitation.

  
  

• Safety Profile: Low toxicity (LD50 >5,000 mg/kg oral in rats); non-flammable and stable under normal conditions, suitable for food contact.

  
  

• Eco-Friendly: Supports sustainable farming by enabling targeted fertilization, lowering overall chemical inputs and groundwater contamination risks.

  
  

Monopotassium phosphate CAS No. 7778-77-0 facilitates innovation in clean-label products and precision agriculture, driving productivity with minimal ecological footprint.

Frequently Asked Questions (FAQs)

What is monopotassium phosphate CAS No. 7778-77-0 primarily used for in agriculture?

Monopotassium phosphate CAS No. 7778-77-0 is a key fertilizer for hydroponics and drip irrigation, supplying phosphorus for energy transfer and potassium for water regulation, particularly beneficial for tomatoes, peppers, and grapes during bloom stages.

Is monopotassium phosphate CAS No. 7778-77-0 suitable as a food additive?

Yes, it regulates acidity and acts as a stabilizer in beverages and confectionery, with usage levels typically under 0.5%, ensuring no impact on flavor while complying with FDA and EU guidelines.

What are the solubility and pH properties of monopotassium phosphate CAS No. 7778-77-0?

It dissolves rapidly in water to form a clear solution with a pH around 4.5, making it excellent for quick nutrient release in irrigation systems and buffering in acidic beverages.

Does monopotassium phosphate CAS No. 7778-77-0 contain nitrogen, and why does that matter?

No, it is nitrogen-free, allowing growers to apply phosphorus and potassium independently, avoiding excessive vegetative growth and focusing on fruit quality in sensitive crops.

How does monopotassium phosphate CAS No. 7778-77-0 compare to dipotassium phosphate?

Monopotassium phosphate (KH₂PO₄) is acidic and phosphorus-heavy for lowering pH, while dipotassium phosphate (K₂HPO₄) is alkaline for elevation; MKP suits acidic soils, whereas DKP fits neutral to basic environments.

Can monopotassium phosphate CAS No. 7778-77-0 be used in fire extinguishers?

Absolutely; its phosphate ions smother flames by forming a non-combustible coating, making it a core component in ABC-class dry powders for versatile fire suppression.

Contact Us

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