Disodium Phosphate

Disodium Phosphate

Disodium phosphate, also known as sodium hydrogen phosphate or disodium hydrogen phosphate, is an inorganic compound with the chemical formula Na2HPO4. It is a white, crystalline powder or granular solid that is highly soluble in water.

In terms of its chemical composition, disodium phosphate consists of two sodium (Na+) ions and one phosphate (PO43-) ion. It is derived from phosphoric acid and is commonly used as a food additive, pH buffer, and a source of phosphorus in various industries.

As a food additive, disodium phosphate is primarily used as a texturizer, emulsifier, and stabilizer in processed foods and beverages. It helps improve the texture, increase shelf life, and prevent the separation of ingredients. Additionally, it can act as a pH regulator in certain food products.

In summary, disodium phosphate is an inorganic compound that serves various purposes in food and industrial applications, primarily as a food additive and pH buffer.



Disodium phosphate, or sodium hydrogen phosphate, has several major and common uses across various industries. Here are some of the most notable applications:

  1. Food Industry: Disodium phosphate is widely used as a food additive. It functions as an emulsifier, stabilizer, and texturizer, helping to improve the texture and appearance of processed foods. It is commonly found in dairy products, baked goods, processed meats, canned soups, and beverages.
  2. Water Treatment: Disodium phosphate is utilized in water treatment processes. It acts as a pH buffer and helps to control the acidity or alkalinity of water. It is commonly used in swimming pools and water purification systems.
  3. Cleaning Products: Disodium phosphate is an ingredient in various cleaning products, including detergents and soaps. It aids in the removal of mineral deposits, stains, and greasy residues. It is particularly effective in cleaning hard surfaces like tiles and glass.
  4. Pharmaceutical Industry: Disodium phosphate is used in the pharmaceutical industry as a buffering agent. It helps maintain the pH stability of certain medications and facilitates the absorption of drugs in the body.
  5. Laboratory Applications: Disodium phosphate is commonly employed in laboratory settings. It is used as a reagent in chemical reactions, as a pH buffer in various experiments, and as a component in buffer solutions used in biological and biochemical research.
  6. Animal Nutrition: Disodium phosphate is sometimes added to animal feed as a source of phosphorus and sodium. It helps promote healthy growth and development in livestock and poultry.

It’s important to note that while disodium phosphate has multiple applications, its usage and maximum permitted levels as a food additive are regulated by food safety authorities to ensure its safety for consumption.


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Safety Guidelines

When using disodium phosphate, it is essential to observe certain precautions to ensure safe handling and appropriate usage. Here are some precautions to consider:
  1. Read and Follow Instructions: Before using disodium phosphate, carefully read and follow the instructions provided by the manufacturer or supplier. Pay attention to recommended dosage, storage conditions, and any specific handling instructions.
  2. Personal Protective Equipment (PPE): When handling disodium phosphate, it is advisable to wear appropriate personal protective equipment, such as gloves, safety goggles, and a lab coat or protective clothing. This helps protect your skin, eyes, and clothing from potential contact with the substance.
  3. Ventilation: Ensure that you are working in a well-ventilated area when handling disodium phosphate. Good ventilation helps prevent the buildup of dust or fumes and reduces the risk of inhalation.
  4. Avoid Skin and Eye Contact: Avoid direct skin contact with disodium phosphate. In case of accidental contact, immediately rinse the affected area with plenty of water. If disodium phosphate comes into contact with your eyes, flush them with water for at least 15 minutes and seek medical attention if irritation persists.
  5. Inhalation Precautions: To minimize the risk of inhalation, avoid creating or breathing in dust or aerosols of disodium phosphate. If working with the powdered form, use appropriate dust control measures, such as local exhaust ventilation or wearing a dust mask.
  6. Storage and Handling: Store disodium phosphate in a cool, dry place away from incompatible substances. Keep it tightly sealed in its original container to prevent moisture absorption. Follow any specific storage instructions provided by the manufacturer.
  7. Disposal: Dispose of disodium phosphate in accordance with local regulations and guidelines. Do not release it into the environment or sewage system without proper treatment or permission.
  8. Compatibility with Other Chemicals: Be cautious when mixing disodium phosphate with other chemicals or substances. Some combinations can lead to hazardous reactions or produce toxic fumes. Always check for compatibility and seek expert advice if needed.
It is crucial to consult the material safety data sheet (MSDS) or safety information provided by the manufacturer for detailed safety instructions and specific precautions associated with the particular form and concentration of disodium phosphate you are using.

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