Hypophosphoric acid

Hypophosphoric acid (CAS 7803-60-3), also recognized under the systematic name hypodiphosphoric acid, is an inorganic phosphorus acid occupying a distinct oxidation state between phosphorous and phosphoric acid.

It functions industrially as a pH regulator, chelating agent, and corrosion inhibitor across water treatment, mining, pharmaceutical, and agricultural applications. In water treatment systems, it sequesters metal ions.

The chemical inhibits scale formation and pipe corrosion in industrial cooling and process water circuits. Mining and metallurgical operations use it for metal ion control during ore processing and leaching stages.

Selective chelation affects downstream metal recovery in these environments. Pharmaceutical manufacturers source it as a reagent and pH-buffering intermediate in synthesis processes requiring precise acid-stage control.

In agricultural chemistry, it serves as a phosphorus-source intermediate in the production of specialty fertilizer formulations and crop protection compounds. This versatility makes it a vital component for many industrial sectors.

Hypophosphoric acid is supplied as an aqueous solution, with concentration and purity specifications determined by the intended application. Technical-grade material is the primary commercial form available to industrial buyers.

Pharmaceutical and synthesis-grade material may be available from specialist suppliers, with batch documentation provided on request. All shipments are handled according to strict safety protocols for inorganic acids.