Meta-Phosphoric Acid is a chemical compound with the formula HPO3. It is a type of phosphoric acid that is formed when phosphoric acid loses a water molecule. This compound is often used in various industrial applications, including food processing and as a reagent in laboratories. In its solid form, Meta-Phosphoric Acid appears as a white, crystalline substance. It is known for its ability to act as a dehydrating agent and is also used in the production of certain phosphates. Its unique properties make it valuable in both chemical synthesis and analytical chemistry.