Meta-phosphoric acid is primarily used in the food industry as a sequestrant and emulsifier, helping to stabilize and improve the texture of various food products. It is also employed in water treatment processes to control scale formation and corrosion in pipelines and boilers. In the pharmaceutical sector, it serves as an excipient in the formulation of certain medications, aiding in the stabilization of active ingredients. Additionally, it finds application in the production of detergents and cleaning agents, where it acts as a chelating agent to bind metal ions and enhance cleaning efficiency. Its ability to form complexes with metal ions makes it useful in analytical chemistry for titrations and as a reagent in laboratory settings.