Description

Metaphosphate CAS NO 31961-83-8 is a versatile inorganic phosphate compound, a polymeric form of phosphate, known for its utility as a sequestering and dispersing agent. Its primary commercial value lies in its ability to bind metal ions, control water hardness, and modify rheological properties in various industrial processes. This makes it an essential raw material for manufacturers in the water treatment, detergent, food processing, and ceramics industries seeking effective and reliable chemical solutions.

Application

• Water Treatment: Acts as a scale and corrosion inhibitor in cooling and boiler water systems by sequestering calcium and magnesium ions.
• Detergent & Cleaning Formulations: Functions as a builder to soften water, enhance surfactant efficiency, and prevent soil redeposition in industrial and institutional cleaners.
• Food Industry: Used as a sequestrant, emulsifier, and texturizer in processed foods, seafood, and meat products to improve quality and shelf-life.
• Ceramics & Glass Manufacturing: Serves as a fluxing agent to lower melting temperatures and modify the properties of glazes and glass batches.
• Oilfield Applications: Employed in drilling muds and completion fluids as a thinner and dispersant to control viscosity and fluid loss.
• Industrial Cleaning: Key component in metal cleaning and derusting formulations for its chelating power on metal oxides.
• Textile Processing: Used in scouring and bleaching baths to sequester metal ions that can interfere with chemical processes and fabric quality.
• Paints & Coatings: Acts as a pigment dispersant and stabilizer to prevent settling and ensure consistent application properties.

Basic Information

Product Name	Metaphosphate
CAS No.	31961-83-8
Molecular Formula	(NaPO₃)ₓ
Molecular Weight	Variable (Polymer)
Synonyms	Sodium Metaphosphate; Graham's Salt; Insoluble Sodium Metaphosphate; Sodium Polyphosphate; Glassy Sodium Phosphate; Sodium Hexametaphosphate (common name for polymeric forms); Calgon S; Phosphate Glass; Sodium Tetrapolyphosphate
EINECS	250-816-9

Quality Control

Our Metaphosphate is manufactured under a stringent quality management system to ensure batch-to-batch consistency and performance. Quality is verified against key parameters including assay (P₂O₅ content), pH, viscosity, and metal ion sequestration value. Certificates of Analysis (COA) documenting these specifications are provided with every shipment. We adhere to relevant industry standards, including food-grade specifications (FCC) where applicable, to meet the diverse needs of our global clientele.

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). Keep the container tightly sealed when not in use to prevent caking or degradation due to absorption of atmospheric moisture. Store away from incompatible materials.

Specification

Item	Specification
Appearance	White powder or granules
Identification (IR)	Conforms
Assay (as P₂O₅)	≥ 65.0 %
pH (1% Solution)	5.5 - 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.