Description

Sodium Polyphosphate CAS NO 68915-31-1 is a versatile inorganic polymer composed of sodium cations and polyphosphate anions. This compound is valued for its exceptional sequestering, dispersing, and water-softening properties, making it a critical functional additive in numerous industrial processes. It is essential for manufacturers in sectors such as water treatment, food processing, detergents, and ceramics who require reliable control over mineral scale and metal ion interactions.

Application

• Water Treatment: Acts as a highly effective scale and corrosion inhibitor in cooling towers, boilers, and reverse osmosis systems.
• Food Industry: Used as an emulsifier, texturizer, and moisture-retaining agent in processed meats, seafood, and dairy products.
• Detergent & Cleaning Formulations: Serves as a powerful builder to sequester hardness ions (calcium, magnesium), enhancing surfactant efficiency and preventing soil redeposition.
• Ceramic & Clay Processing: Functions as a deflocculant to control viscosity and improve the workability of slips and slurries.
• Oil Field Applications: Employed in drilling muds and as a scale inhibitor to maintain wellbore integrity and flow assurance.
• Industrial Cleaning: Key component in metal cleaning and derusting formulations due to its chelating power.
• Textile Processing: Used as a dispersing agent in bleaching and dyeing baths to ensure uniform color application.
• Paints & Coatings: Acts as a pigment dispersant to improve stability and prevent settling in aqueous formulations.

Basic Information

Product Name	Sodium Polyphosphate
CAS No.	68915-31-1
Molecular Formula	(NaPO₃)ₙ
Molecular Weight	Variable (Polymer)
Synonyms	Polyphosphoric acid, sodium salt; Sodium hexametaphosphate (common name for specific chain lengths); Graham's salt; Glassy sodium phosphate; Sodium polymetaphosphate; SHMP; Food Grade Sodium Polyphosphate; E452(i)
EINECS	Contact for details

Quality Control

Our Sodium Polyphosphate is manufactured under a stringent quality management system. Each batch is tested to ensure it meets precise specifications for parameters such as phosphate content, pH, and heavy metal limits. Certificates of Analysis (COA) are provided with every shipment, and we can supply material compliant with relevant standards such as FCC for food-grade applications or industrial specifications upon request.

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 moisture-proof container to prevent caking and degradation.

Specification

Item	Specification
Appearance	White powder or granules
Identification (IR)	Conforms
Assay (as P₂O₅)	≥ 60.0 %
pH (1% Solution)	5.8 - 7.5
Water Insoluble Matter	≤ 0.1 %
Heavy Metals (as Pb)	≤ 10 ppm
Arsenic (As)	≤ 3 ppm
Loss on Drying	≤ 5.0 %

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