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 pH stability, which is critical for enhancing the performance and efficiency of industrial formulations. This makes it an essential ingredient for manufacturers in the detergent, food processing, water treatment, and ceramics industries seeking to improve product quality and process control.

Application

• Detergent & Cleaning Agent Manufacturing: A key builder in powdered and liquid detergents, dishwashing compounds, and industrial cleaners to sequester hardness ions, enhance surfactant efficiency, and prevent soil redeposition.
• Food Processing Industry: Used as a food additive (E451) for moisture retention, texture improvement, and color stabilization in processed meats, seafood, poultry, and dairy products.
• Industrial Water Treatment: Acts as a scale and corrosion inhibitor in cooling water systems, boiler water treatment, and as a dispersant in drilling muds.
• Ceramics & Textile Processing: Serves as a deflocculant in ceramic slip casting and as a scouring aid, dyeing assistant, and anti-precipitant in textile processing.
• Oil & Gas Industry: Utilized in drilling fluid formulations to control rheology and as a shale inhibitor.
• Metal Surface Treatment: Employed in degreasing and cleaning formulations prior to painting, plating, or other surface finishing operations.

Basic Information

Product Name	Sodium Tripolyphosphate
CAS No.	13573-18-7
Molecular Formula	Na5P3O10
Molecular Weight	367.86 g/mol
Synonyms	Sodium Triphosphate; STPP; Pentasodium Triphosphate; Triphosphoric Acid, Pentasodium Salt; Sodium Polyphosphate; E451(i); Food Grade STPP; Detergent Grade STPP; Sodium Tripolyphosphate Anhydrous
EINECS	236-981-7

Quality Control

Our Sodium Tripolyphosphate is manufactured under a stringent quality management system to ensure batch-to-batch consistency and reliability. We offer various grades, including Technical, Food (FCC), and Detergent grades, each produced to meet specific industry standards. Every lot is accompanied by a comprehensive Certificate of Analysis (COA) detailing purity, assay, and impurity profiles, ensuring full traceability and compliance with your procurement requirements.

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 a suitable moisture-proof container to prevent caking and degradation. Keep away from strong acids and moisture sources.

Specification

Item	Specification
Appearance	White powder or granules
Identification (IR)	Conforms
Assay (as Na5P3O10)	≥ 94.0%
pH (1% Solution)	9.5 - 10.5
Water Insoluble Matter	≤ 0.1%
Heavy Metals (as Pb)	≤ 10 ppm
Loss on Drying	≤ 0.7%
Particle Size (Typical)	Contact for details

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