Phosphoric Acid

Phosphoric acid, also known as orthophosphoric acid, is a chemical compound of great importance in various industries. With the chemical formula H₃PO₄, this inorganic acid is characterized by being a colorless and viscous liquid in its pure form. Its versatility and unique properties have made it an essential component in multiple industrial, agricultural and food applications. Below, we will explore the most notable uses of phosphoric acid and its impact on different sectors.

Agriculture: Fertilizers and Plant Nutrition

One of the most important uses of phosphoric acid is in the production of phosphate fertilizers. These fertilizers are essential for the growth and development of plants, since phosphorus is a key nutrient that contributes to the formation of strong roots, flowers, fruits and seeds. Phosphoric acid is used to produce single superphosphate (SSP) and triple superphosphate (TSP), two types of fertilizers widely used in modern agriculture.

Food Industry: Additive and Acidity Regulator

In the food industry, phosphoric acid is used as an additive and acidity regulator. It is commonly found in carbonated beverages, where it helps provide a tart, refreshing flavor. In addition, it is used in the production of dairy products, processed meats and canned foods to adjust the pH and improve the stability and preservation of the products. Its use is regulated and safe in the quantities permitted by food regulations.

Metal Surface Treatment: Protection and Cleaning

Phosphoric acid also plays a crucial role in the treatment of metal surfaces. It is used in phosphating processes to create a protective layer on metals such as steel and iron, which helps prevent corrosion and improves the adhesion of paints and coatings. In addition, it is a common component in industrial cleaning products intended to remove oxides and mineral deposits from metal surfaces.

Chemical Industry: Synthesis and Production of Chemical Products

In the chemical industry, phosphoric acid is used as a raw material in the synthesis of various chemical products. It is used in the production of detergents, pharmaceuticals, cleaning products and water treatment agents. Its ability to act as a catalyst in chemical reactions and its compatibility with other compounds make it invaluable in the manufacture of a wide range of products.

Medical and Pharmaceutical Sector: Formulations and Treatments

Phosphoric acid also has applications in the medical and pharmaceutical sector. It is used in the formulation of certain medications and dental treatments, such as phosphate sealants for cavity prevention. In addition, it is used in buffer solutions used in diagnostic laboratories and in the preparation of pharmaceutical products.


Phosphoric acid is a chemical compound whose versatility and effectiveness have made it an indispensable component in various industries. From agriculture to the food industry, through the treatment of metal surfaces and the production of chemical products, its impact is significant and broad. The continuous research and development around this compound promises new applications and improvements in its current uses, ensuring its relevance in the future of modern industry.