Description

Calcium Metaphosphate is an inorganic phosphate compound of significant industrial interest. Its unique polymeric metaphosphate structure offers distinct properties compared to orthophosphates, making it valuable for specialized applications. This material is primarily utilized in sectors requiring specific phosphorus sources or glass-forming agents, such as specialty glass manufacturing, ceramics, and as a potential nutrient source in controlled-release fertilizers.

Application

• Specialty Glass & Ceramics: Acts as a high-temperature flux and glass-forming agent in the production of optical glasses, sealing glasses, and advanced ceramic composites.
• Controlled-Release Fertilizers: Serves as a slow-release phosphorus source in advanced agricultural formulations, providing prolonged nutrient availability.
• Metal Surface Treatment: Used in specific phosphate conversion coatings and as a component in formulations for metal corrosion protection.
• Catalyst & Catalyst Support: Employed as a solid acid catalyst or a support material in various organic synthesis and petrochemical processes.
• Dental & Biomedical Materials: Investigated for use in bioactive glass compositions for bone graft substitutes and dental cements.
• Flame Retardant Additive: Incorporated into polymer systems and coatings to impart flame-retardant properties.
• Laboratory Reagent: Used as a high-purity chemical reagent in research and analytical chemistry.
• Food Additive (where approved): Potential use as a sequestrant, texturizer, or nutrient fortification agent in specific food-grade applications, subject to regional regulatory compliance.

Basic Information

Product Name	Calcium Metaphosphate
CAS No.	123093-85-6
Molecular Formula	(Ca(PO3)2)n
Molecular Weight	198.02 (monomeric unit)
Synonyms	Calcium polyphosphate; Metaphosphoric acid, calcium salt; Calcium polymetaphosphate; Graham's salt, calcium form; Calcium hexametaphosphate (common misnomer); Insoluble metaphosphate of calcium; Calcium phosphate glass; CAS 7790-76-3 (related linear polyphosphate forms)
EINECS	Contact for details

Quality Control

Our Calcium Metaphosphate is manufactured under a strict quality management system. Each batch undergoes comprehensive analysis to ensure consistency and meets specifications for parameters such as assay, heavy metal content, and particle size distribution. Certificates of Analysis (COA) are provided with every shipment, detailing the results of our rigorous testing protocols. We can supply grades tailored to industrial, technical, and high-purity requirements.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at room temperature (15-25°C). The product is hygroscopic (moisture-sensitive); keep the container tightly sealed to prevent absorption of atmospheric moisture. Store away from strong acids and strong bases.

Specification

Item	Specification
Appearance	White powder or granules
Identification (IR)	Conforms
Assay (as Ca(PO3)2)	≥ 95.0%
Loss on Drying	≤ 2.0%
Heavy Metals (as Pb)	≤ 20 ppm
Arsenic (As)	≤ 3 ppm
Lead (Pb)	≤ 10 ppm
Water Insoluble Matter	≤ 0.5%
pH (5% suspension)	5.0 - 7.0
Particle Size (Typical)	Pass through 100 mesh

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