Phosphoric acid is an odorless, clear colorless syrupy liquid. It has a pH of 1.5 and a specific gravity of 1.69. Phosphoric acid has a concentration of 75 – 85%. The use of acid determines the concentration to be used.

Phosphoric acid is important as an industrial chemical used as an intermediate in the fertilizer industry, for metal surface treatment, it is used as an additive in the food industry, and used in edible oil refining.

Application:

1. Soaps and detergents
2. Food industry
3. Water treatment
4. Toothpastes

Food-grade phosphoric acid (additive E338) is used to acidify foods and beverages such as various colas and jams, providing a tangy or sour taste. The phosphoric acid also serves as a preservative. Soft drinks containing phosphoric acid, which would include Coca-Cola, are sometimes called phosphate sodas or phosphates. Phosphoric acid in soft drinks has the potential to cause dental erosion. Phosphoric acid also has the potential to contribute to the formation of kidney stones, especially in those who have had kidney stones previously.