The chemical formula for phosphoric acid is H3PO4, according to the Encyclopaedia Britannica. Phosphoric acid is also known as orthophosphoric acid. It has been used in fertilizers, dental cements, food flavorings and textiles.
Phosphoric acid is most commonly an 85 percent aqueous solution, which means it is colourless, odourless and non-volatile, according to Wikipedia. While it is used in a variety of situations, over 90 percent of its usage is in fertilizers. It has been linked to lowered bone density and kidney disease when used in cola drinks, according to Wikipedia. Medicinally, it can be found in some over-the-counter, anti-nausea medications.