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Phosphoric Acid

Medically reviewed by Last updated on May 15, 2023.

Excipient (pharmacologically inactive substance)

What is it?

Phosphoric acid, H3PO4, is a strong acid used commonly for industrial purposes. Dilute solutions have been used to acidify urine and as an aid to remove necrotic debris. In dentistry, it may be used in silicate cements, and to etch enamel and dentin surfaces prior to application of various types of resins. In may also be used as a dispersing agent in pharmaceuticals. The primary use of phosphoric acid is in fertilizers.[1]

List of medications using Phosphoric Acid


  1. Accessed February 27, 2015 at

Further information

Always consult your healthcare provider to ensure the information displayed on this page applies to your personal circumstances.