Phosphoric acid, also known as orthophosphoric acid or phosphoric(V) acid, is a weak acid with the chemical formula H3PO4. It is a non-toxic compound which, when pure, is a solid at room temperature and pressure.
Phosphoric acid is commonly encountered in chemical laboratories as an 85% aqueous solution, which is a colourless, odourless, and non-volatile syrupy liquid. Although phosphoric acid does not meet the strict definition of a strong acid, the 85% solution can still severely irritate the skin and damage the eyes.
The name “orthophosphoric acid” can be used to distinguish this specific acid from other “phosphoric acids”, such as pyrophosphoric acid. Nevertheless, the term “phosphoric acid” often means this specific compound; and that is the current IUPAC nomenclature.
| Purity | 85%, A.R., 1.0mol/l |
|---|---|
| Brand | R&M |






