Disodium Phosphate

Other Trading Names:

  • DSP

CAS Number: 7558-79-4

HS Code: 2835299000

Types of Packaging:

  • 25kg/ Bag
  • 1000kg/ Bag
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Disodium Phosphate

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Chemical Name

Disodium phosphate



Molecular Formula


CAS Number



white powder

Grade Standard

Food Grade


Highly Soluble in Water

Melting Point

35 ºC


1.7 g/cm3

Chemical Description

  • Disodium Phosphate (DSP) is an inorganic compound that forms a white, crystalline powder and is highly soluble in water. It is recognized for its role as a buffering agent, maintaining pH levels in a range of industrial processes and products.
  • In the food industry, DSP is utilized as an emulsifier to prevent oil and water components from separating in processed foods. It also acts as a stabilizer in dairy products and processed meats, ensuring consistent texture and quality. As a leavening agent, it contributes to the rise and fluffiness of baked goods.
  • Water treatment facilities employ DSP for softening hard water by removing calcium and magnesium ions, which can contribute to scaling in pipes and equipment. This application is critical for protecting infrastructure and ensuring efficient operation.
  • The detergent sector benefits from DSP's ability to bind with calcium and magnesium, enhancing the cleaning power of soaps and detergents by preventing these ions from interfering with the cleaning process.
  • In the pharmaceutical industry, Disodium Phosphate is used as a laxative and as a buffer to maintain the pH of solutions. Its buffering capabilities are essential for ensuring the stability and efficacy of various medications.
  • DSP serves as an important component in the production of ceramics and glass, where it functions as a flux, lowering the melting point of silica and aiding in the formation of glass.
  • In textile manufacturing, it is used as a fire retardant, contributing to the safety of fabrics by reducing their flammability.
  • Environmental applications of DSP include its use in treating boiler water, preventing corrosion, and scale formation, which can lead to increased energy consumption and equipment damage.
  • Despite its wide range of applications, handling and usage of Disodium Phosphate require careful consideration of environmental and health safety standards due to its potential impact on water bodies and ecosystems when not managed properly.
  • Disodium Phosphate's versatility and efficacy in numerous industrial and food processing applications highlight its importance as a chemical additive, demonstrating its value across various sectors.
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Disodium Phosphate