Phosphoric acid (ortho-phosphoric acid, mono-phosphoric acid or phosphoric(V) acid) is a colorless, odorless phosphorus-containing solid, and inorganic compound with the chemical formula H3PO4. It is commonly encountered as an 85% aqueous solution, which is acolourless, odourless, and non-volatile syrupy liquid.
Phosphoric acid is a component of fertilizers, detergents, and many household cleaning products.
Dilute solutions have a pleasing acid taste; it's also used as a food additive, lending acidic properties to soft drinks and other prepared foods, and in water treatment products.