Hypophosphoric acid

Hypophosphoric acid (CAS 7803-60-3), also known as hypodiphosphoric acid, is an inorganic phosphorus acid in an oxidation state between phosphorous and phosphoric acid.

Where is Hypophosphoric acid used?

• Water treatment: pH regulator, chelating agent and corrosion inhibitor that sequesters metal ions
• Industrial cooling and process water circuits: inhibits scale formation and pipe corrosion
• Mining and metallurgy: metal ion control during ore processing and leaching, affecting downstream metal recovery
• Pharmaceutical synthesis: reagent and pH-buffering intermediate for precise acid-stage control
• Agricultural chemistry: phosphorus-source intermediate for specialty fertilizers and crop protection compounds
• It also functions as a pH regulator and chelating agent.

Good to know: Technical-grade material is the primary commercial form; pharmaceutical and synthesis-grade material may be available from specialist suppliers, with batch documentation provided on request.

Commercial specifications

• Aqueous solution; concentration and purity specifications determined by the intended application