Disodium Phosphate(DSP) CAS No.7558-79-4

Key Specifications and Properties

• Molecular Formula: Na₂HPO₄

• Molecular Weight: 141.96 g/mol

• Appearance: White crystalline powder or granules

• Purity: ≥98.0% (food/pharma grade); ≥97.0% (technical grade)

• Solubility: Freely soluble in water (≥10 g/100 mL at 20°C); slightly soluble in alcohol

• Density: 1.70 g/cm³

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• pH (1% aqueous solution): 8.8–9.6

• Loss on Drying: ≤5.0% (at 105°C)

• Heavy Metals: ≤10 ppm (as Pb)

• Storage: Cool, dry, well-ventilated area; protect from humidity to prevent deliquescence

  
  

These traits ensure disodium phosphate CAS No. 7558-79-4 maintains integrity in moist environments and integrates effortlessly into liquid formulations.

Applications Across Industries

Disodium phosphate CAS No. 7558-79-4 excels in pH control and ion stabilization, supporting efficiency across sectors:

• Food and Beverages: Acts as a buffer and emulsifier in cheeses, evaporated milk, and meat products to prevent coagulation and improve meltability; fortifies cereals and beverages with phosphorus, approved as GRAS (E339(ii)).

  
  

• Pharmaceuticals: Utilized as an excipient in tablets and injectables for pH adjustment; serves as a phosphorus source in electrolyte replenishment solutions.

  
  

• Water Treatment: Functions as a corrosion inhibitor and alkalinity builder in boiler feeds, neutralizing acids and preventing scale buildup.

  
  

• Detergents and Cleaning: Incorporated as a builder to soften water and enhance surfactant performance in laundry and dishwashing agents.

  
  

• Agriculture: Provides soluble phosphorus in animal feed supplements, aiding bone health and metabolic functions in livestock.

  
  

Incorporating DSP promotes sustainable practices by optimizing resource use and minimizing waste in processing lines.

Benefits of Choosing Disodium Phosphate CAS No. 7558-79-4

• pH Buffering Excellence: Maintains stable alkaline conditions (pH 9.0), resisting shifts in acidic media for consistent product quality.

  
  

• Nutritional Value: Delivers 19% phosphorus by weight, supporting dietary fortification with high bioavailability and no off-tastes.

  
  

• Safety and Purity: Non-irritating with low toxicity (LD50 >5,000 mg/kg oral in rats); suitable for organic and clean-label products.

  
  

• Operational Efficiency: Rapid dissolution reduces mixing times, enabling scalable production with lower energy demands.

  
  

Disodium phosphate CAS No. 7558-79-4 enables formulators to create durable, high-quality goods that align with health and environmental priorities.

Frequently Asked Questions (FAQs)

What is disodium phosphate CAS No. 7558-79-4 used for in food products?

Disodium phosphate CAS No. 7558-79-4 is added to dairy and processed meats as a stabilizer and buffer, preventing separation in cheeses and enhancing tenderness in cured products through protein hydration.

Is disodium phosphate CAS No. 7558-79-4 highly soluble in water?

Yes, it dissolves readily in water to form clear solutions, making it suitable for aqueous systems like beverages and brines where uniform distribution is essential.

What pH range does disodium phosphate CAS No. 7558-79-4 provide?

It produces a mildly alkaline pH of 8.8–9.6 in 1% solutions, ideal for neutralizing mild acids in food and pharmaceutical formulations without overpowering alkalinity.

Does disodium phosphate CAS No. 7558-79-4 comply with regulatory standards for additives?

Indeed, it satisfies FCC, USP/NF, and EU E339(ii) requirements, allowing safe incorporation at levels up to 0.5–1.0% in fortified foods and supplements.

How does disodium phosphate CAS No. 7558-79-4 differ from monosodium phosphate?

Disodium phosphate (Na₂HPO₄) is alkaline and used for pH elevation, while monosodium phosphate (NaH₂PO₄) is acidic for lowering pH; DSP is preferred in dairy for its emulsifying strength.

Can disodium phosphate CAS No. 7558-79-4 be used in water treatment systems?

Absolutely; it alkalizes and inhibits corrosion in boilers by forming protective films on metal surfaces, typically dosed at 10–50 ppm for optimal performance.

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