Phosphoric acid SUPPLIER IN KOLKATA india

Phosphoric acid (also known as orthophosphoric acid or phosphoric(V) acid) is a weak acid with the chemical formula H3PO4. Orthophosphoric acid refers to phosphoric acid, which is the IUPAC name for this compound. The prefix ortho- is used to distinguish the acid from related phosphoric acids, called polyphosphoric acids. Orthophosphoric acid is a non-toxic acid, which, when pure, is a solid at room temperature and pressure. The conjugate base of phosphoric acid is the dihydrogen phosphate ion.

Uses

The dominant use of phosphoric acid is for fertilizers, consuming approximately 90% of production.

Food-grade phosphoric acid (additive E338 is used to acidify foods and beverages such as various colas and jams. It provides a tangy or sour taste. 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.

Specific applications of phosphoric acid include:

In anti-rust treatment by phosphate conversion coating
As an external standard for phosphorus-31 nuclear magnetic resonance.
In phosphoric acid fuel cells.
In activated carbon production.
In compound semiconductor processing, to etch Indium gallium arsenide selectively with respect to indium phosphide.
In microfabrication to etch silicon nitride selectively with respect to silicon dioxide.
As a pH adjuster in cosmetics and skin-care products.
As a sanitizing agent in the dairy, food, and brewing industries