Phosphoric Acid

At high concentrations, phosphoric acid is corrosive, appearing as a colorless and odorless solid. It acts as a weak to moderately strong acid with three protons, and its salts and esters are termed phosphates or organophosphates. The chemical readily absorbs moisture and can be mixed with water, typically distributed as an 83 to 90 percent aqueous solution with good conductivity. Phosphoric acid is produced from raw phosphate, often apatite, reacted with sulfuric acid, hydrochloric acid, or nitric acid. Alternatively, thermal phosphoric acid can be obtained by burning phosphorus to form phosphorus pentoxide, followed by hydrolysis.