GeneralPhosphoric Acid (85%): Properties, Applications, and Safety Considerations

May 23, 2023by alpha0


Phosphoric Acid (85%) is a clear, colorless liquid with a strong acidic odor. It is a highly concentrated form of phosphoric acid, consisting of 85% phosphoric acid and 15% water. Phosphoric Acid is a mineral acid that is commonly used in various industries and applications.

One of the primary uses of Phosphoric Acid (85%) is in the food and beverage industry. It is employed as an acidulant and flavoring agent in soft drinks, jams, jellies, and other processed foods. Phosphoric Acid contributes to the tartness and acidity of these products.

Phosphoric acid Properties:

Phosphoric acid, also known as orthophosphoric acid, is a clear, odorless liquid with a syrupy consistency. It is highly soluble in water and forms an acidic solution. Phosphoric acid is composed of phosphorus, oxygen, and hydrogen atoms. It is available in different concentrations, with 85% being a common industrial strength.


  • Food and Beverage Industry: Phosphoric acid finds extensive use in the food and beverage industry as a food additive and pH adjuster. It is commonly used in soft drinks, jams, jellies, and processed meats. Phosphoric acid provides a tart flavor and helps maintain the desired acidity level in food products.
  • Fertilizer Production: Phosphoric acid is a key ingredient in the production of fertilizers. It is used to produce phosphate-based fertilizers, which provide essential nutrients, such as phosphorus, to promote plant growth and enhance crop yields.
  • Metal Surface Treatment: Phosphoric acid is employed as an etching agent and rust converter in metal surface treatment. It is used to prepare metal surfaces for painting or coating by removing oxide layers and providing better adhesion. Phosphoric acid also aids in the conversion of iron oxide (rust) into a more stable compound, inhibiting further corrosion.
  • Water Treatment: Phosphoric acid is utilized in water treatment processes to adjust pH levels and control the formation of scale and deposits. It is commonly added to water systems, such as cooling towers and boilers, to prevent the buildup of mineral deposits and ensure efficient operation.
  • Pharmaceutical and Personal Care Products: Phosphoric acid is used in the production of certain pharmaceuticals and personal care products. It serves as a pH adjuster, buffering agent, and ingredient in dental products, mouthwashes, and topical ointments.

Safety Considerations:

  • Phosphoric acid is a corrosive substance and should be handled with caution. Here are some key safety considerations:
  • Corrosivity: Phosphoric acid is highly corrosive to the skin, eyes, and respiratory system. Direct contact can cause severe burns and tissue damage. Proper personal protective equipment, such as gloves, goggles, and respiratory protection, should be worn when handling phosphoric acid.
  • Ventilation: Adequate ventilation is essential when working with phosphoric acid to prevent the buildup of vapors. Ensure that the work area is well-ventilated or use appropriate local exhaust ventilation systems.
  • Storage and Handling: Phosphoric acid should be stored in a cool, dry, and well-ventilated area away from incompatible substances. It should be kept in a tightly sealed container and stored separately from oxidizing agents and reactive chemicals.
  • Spill and Leak Response: In the event of a spill or leak, follow proper procedures for containment and cleanup. Absorb spilled phosphoric acid with suitable absorbent materials and dispose of them according to local regulations.


Phosphoric acid is a versatile chemical compound with numerous applications in various industries, including food and beverage, agriculture, metal surface treatment, water treatment, and pharmaceuticals. While it offers many benefits, it is crucial to handle phosphoric acid with care due to its corrosive nature. Alpha Chemical Corp is committed to providing high-quality phosphoric acid and promoting safe handling practices. Stay tuned for more informative blogs on chemicals as we continue to serve the industry with our expertise.


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