Hypophosphorous acid

Hypophosphorous acid (CAS 6303-21-5), also known as phosphinic acid and commonly abbreviated as HPA, is a reducing acid.

Where is Hypophosphorous acid used?

• Chemical manufacturing: strong reducing agent and antioxidant that prevents oxidative degradation in sensitive formulations
• Surface treatment: reducing agent in electroless nickel plating that drives metal deposition onto non-conductive substrates
• Pharmaceuticals: prevents discoloration and oxidative breakdown in active ingredient formulations
• Textile and leather processing: controls unwanted oxidation during dyeing and finishing
• Water treatment: pH regulation and reducing agent for dissolved oxygen and metal ion activity
• In electroless nickel plating it enables metal deposition for electronics and precision components.

Commercial specifications

• Aqueous solution, 50% concentration most commercially standard
• Pharmaceutical-grade material meets stricter purity requirements
• Bulk liquid supply in IBC containers and drums