Diphosphoric acid

Diphosphoric acid (CAS 2466-09-3), also known as pyrophosphoric acid, is an inorganic condensed phosphoric acid.

Where is Diphosphoric acid used?

• Food processing: regulates acidity and sequesters metal ions that would otherwise accelerate oxidative spoilage in packaged and processed products
• Pharmaceutical manufacturing: buffering agent in liquid formulations where precise pH control is critical for active ingredients
• Water treatment: chelates calcium and magnesium ions to prevent scale formation in industrial cooling and distribution systems
• It also acts as a sequestrant in emulsified and dairy-based products, preventing discoloration and texture degradation caused by trace metal contamination.

Good to know: Buyers should confirm grade, concentration, and packaging format with their chemical suppliers, as specifications can differ significantly between industrial and regulated end-use markets.

Commercial specifications

• Liquid solution; concentration and purity vary by application
• Food-grade and technical-grade specifications most commonly available
• Pharmaceutical-grade material to USP or Ph. Eur. standards