Description

Sodium Tripolyphosphate (STPP) is a versatile inorganic polyphosphate salt widely recognized for its superior sequestering, dispersing, and emulsifying properties. Its primary value lies in its ability to bind metal ions, soften water, and maintain the stability of formulations across numerous industries. This makes it an essential processing aid and functional additive for manufacturers in the detergent, food processing, water treatment, and ceramics sectors.

Application

• Detergent & Cleaning Formulations: A key builder in powdered and liquid detergents, dishwashing agents, and industrial cleaners to enhance cleaning efficiency, soften water, and prevent soil redeposition.
• Food Processing: Used as a moisture-retaining agent, quality improver, and pH regulator in seafood, meat, and poultry products to improve texture and yield.
• Industrial Water Treatment: Acts as a scale and corrosion inhibitor in cooling and boiler water systems by sequestering calcium and magnesium ions.
• Ceramics & Textile Processing: Serves as a dispersing agent for clays in ceramic slips and as a scouring aid and dyeing assistant in textile manufacturing.
• Oil Drilling & Metallurgy: Functions as a deflocculant in drilling muds and as a dispersant in ore processing and metal cleaning solutions.
• Paints & Coatings: Utilized as a pigment dispersant to improve the stability and consistency of paint formulations.

Basic Information

Product Name	Sodium Tripolyphosphate
CAS No.	7758-29-4
Molecular Formula	Na5P3O10
Molecular Weight	367.86 g/mol
Synonyms	Sodium Triphosphate; Pentasodium Triphosphate; STPP; Sodium Polyphosphate; Triphosphoric Acid, Pentasodium Salt; E451(i); INS 451(i); Food Grade STPP; Detergent Grade STPP
EINECS	231-838-7

Quality Control

Our Sodium Tripolyphosphate is manufactured under a stringent quality management system. We offer various grades, including Technical, Food (FCC), and Detergent grades, each produced to meet specific industry standards. Every batch undergoes rigorous analytical testing to ensure compliance with specifications for parameters such as assay, phosphate content, pH, and insoluble matter. Certificates of Analysis (COA) are provided and available upon request to guarantee traceability and product consistency.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at room temperature (15-25°C). This product is hygroscopic (moisture-sensitive) and must be kept in original packaging or airtight containers to prevent caking and degradation due to atmospheric moisture.

Specification

Item	Specification
Appearance	White powder or granules
Identification (IR)	Conforms
Assay (as Na5P3O10)	≥ 94.0%
P2O5 Content	≥ 57.0%
pH (1% Solution)	9.2 - 10.0
Water Insoluble Matter	≤ 0.1%
Loss on Drying	≤ 0.7%
Heavy Metals (as Pb)	≤ 10 ppm
Arsenic (As)	≤ 3 ppm
Fluoride (F)	≤ 10 ppm

Note: Specifications can be tailored. Please contact us for the detailed technical data sheet of a specific grade.