Sodium Tripolyphosphate (STPP)
(Heavy Density, Medium Density, Light Density)
Product Overview:
Identification of Substance: pentasodium triphosphate
CAS #: 7758-29-4
Sodium tripolyphosphate (STPP), available in heavy, medium, and light density grades, is a widely used phosphate builder found across detergent, food, and water treatment applications. It is commonly employed in detergent manufacturing as a builder and water softener, improving surfactant efficiency and preventing mineral redeposition during washing. Additionally, it serves as a moisture retention agent in food processing, particularly in meat and seafood products where it reduces drip loss and improves texture during freezing and storage. STPP is also utilized in ceramics manufacturing as a dispersant for clay bodies and glazes. Furthermore, it finds applications in industrial water treatment as a sequestering agent for metal ions.
Relevant identified uses: Washing and cleaning product, water conditioner, emulsifier
Documentation:
Technical Information:
Purity
≥ 94.0 %
P2O5
≥ 57.0 %
pH (1% water solution)
9.2 – 10.0
Water-insoluble
≤ 0.1 %
Iron
≤ 0.015 %
Whitness
≥ 90 %
Density
0.30 – 0.52 g/cm3
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