Phosphoric acid and polyphosphoric acids

HS code 280920 covers phosphoric acid and polyphosphoric acids, which are essential chemicals used in a wide range of industries. These acids play a crucial role in the production of fertilizers, detergents, food additives, and various industrial processes. As a key component in the global supply chain, the phosphoric acid industry is a vital part of the broader chemical sector, contributing significantly to economic growth and development.

Phosphoric acid is primarily produced through the wet-process method, which involves the reaction of phosphate rock with sulfuric acid. The resulting phosphoric acid is then purified and concentrated to the desired strength. Polyphosphoric acids, on the other hand, are produced by dehydrating phosphoric acid at high temperatures, creating a more complex molecular structure.

The main inputs required for the production of phosphoric acid and polyphosphoric acids include phosphate rock, sulfuric acid, and various processing chemicals. Specialized equipment, such as reactors, evaporators, and purification systems, are also essential for the manufacturing process. Additionally, the industry relies on a skilled workforce with expertise in chemical engineering and process optimization.

The primary outputs of HS code 280920 are phosphoric acid and polyphosphoric acids, which are then used as inputs for the production of 310520 Mineral or chemical fertilizers containing phosphorus and potassium, 340220 Washing and cleaning preparations, and 210690 Food preparations not elsewhere specified or included. These acids are also utilized in the production of various industrial chemicals, pharmaceuticals, and water treatment applications.