Phosphate ion (PO₄³⁻)

Phosphate ion (PO₄³⁻)

A compound ion formed when a phosphoric acid molecule releases a proton.



phosphate ion, acidic residue ion, anion, ion, compound ion, phosphoric acid, phosphates, trisodium phosphate, superphosphate, RNA, DNA, inorganic chemistry, chemistry

Related items


Phosphate ion PO₄³⁻


Molar mass: 94.9 g/mol

Shape: regular tetrahedron

Bond angle: 109.5°


Phosphate ions carry a formal charge of -3 and are bound by covalent bonds. The pi bonds of the ion are delocalized. It forms salts with metallic and ammonium ions. Only ammonium and alkali metal phosphates dissolve well in water.

Occurrence and production

The phosphate ion is formed from phosphoric acid through the dissociation of three protons. It occurs in soil and certain minerals.


It is an important component in fertilizers. The manufacturing process of superphosphate consists of making tricalcium phosphate soluble by adding sulfuric acid and then adding gypsum powder. Trisodium phosphate is used in softening water.

Related items

Phosphoric acid (H₃PO₄)

It is also used as a food additive, limescale and rust remover.

Red phosphorus

One of the allotropes of phosphorus.

White phosphorus (P₄)

One of the allotropes of phosphorus.

2-deoxy-beta-D-ribose (C₅H₁₀O₄)

A component of DNA, it contains one less hydroxyl group than β-D-ribose.

Phosphorus pentoxide (P₂O₅)

A compound formed as white smoke during the combustion of phosphorus.


ATP is the main source of energy for cells.

Beta-D-ribose (C₅H₁₀O₅)

A crystalline compound found in nucleic acids, coenzymes, nucleotides and nucleosides.

Coenzyme A

An acyl-carrier coenzyme taking part in both anabolic and catabolic processes.


Carrier of genetic information in cells.


NAD⁺ is a coenzyme that plays an important role mainly in catabolic processes, while NADP is important in anabolic processes as hydrogen carriers.

Phosphorus trichloride (PCl₃)

Colorless liquid that gives off smoke in moist air.


A polynucleotid made up of phosphoric acid, ribose, and nucleobases (cytosine, uracil, adenine and guanine).

The phosphorus cycle

The phosphorus cycle describes the movement of phosphorus through the lithosphere, hydrosphere, and biosphere.

Permanganate ion (MnO₄⁻)

Potassium permanganate is used as a disinfectant.

Added to your cart.