1. Description

Chemical Formula: Na₅P₃O₁₀
CAS Number: 7758-29-4
Sodium tripolyphosphate (STPP) is an inorganic compound belonging to the polyphosphate family. It is a white, crystalline powder or granular substance highly soluble in water. STPP is widely used in industrial and household applications due to its versatile functional properties, particularly as a water softener, detergent builder, and food additive.

2.Industrial Applications

2.1 Detergents and Cleaners

Acts as a builder in laundry and dishwashing detergents, improving cleaning efficiency by softening water and suspending dirt.
Prevents redeposition of soil on fabrics and surfaces.

2.2 Food Industry

Used as a food additive (E451) for moisture retention, texture improvement, and pH stabilization.
Common in processed meats, seafood, poultry, and dairy products to enhance tenderness and shelf life.

2.3 Water Treatment

Functions as a corrosion inhibitor and scale preventer in water systems.

2.4 Industrial Uses

Employed in ceramics, leather tanning, textiles, and as a dispersant in paints and coatings.