Sodium tripolyphosphate

Sodium tripolyphosphate (CAS 7758-29-4), commonly known as STPP or E451i, is a polyphosphate salt used in detergent manufacturing, food processing, and industrial treatment.

Where is Sodium tripolyphosphate used?

• Detergent and cleaning products: builder that softens water by sequestering hardness ions, boosting surfactant performance in household and industrial cleaners
• Food: moisture-retention and texture agent in processed meats, seafood, and dairy products
• Water treatment: controls scale formation and disperses mineral deposits in industrial cooling and boiler systems
• Ceramics and paper: deflocculant that reduces slurry viscosity and improves material processability
• It binds calcium and magnesium ions as a sequestrant, builder, and dispersing agent.

Commercial specifications

• Food-grade (FCC, E451i compliant) and technical-grade
• Anhydrous and hydrated forms