Description

Metaphosphoric Acid CAS NO 37267-86-0 is a high-purity inorganic acid, a polymeric form of phosphoric acid, valued for its strong sequestering and acidic properties. It serves as a critical reagent and processing aid where controlled acidity and metal ion chelation are required. This product is essential for manufacturers in the pharmaceutical, food & beverage, and analytical chemistry sectors seeking reliable, high-quality chemical inputs.

Application

• Pharmaceutical Synthesis & Excipient: Used as a stabilizing agent, pH adjuster, and sequestrant in various drug formulations and intermediate synthesis.
• Food & Beverage Industry (FCC Grade): Employed as an acidity regulator, preservative, and clarifying agent in beverages and food products.
• Analytical Chemistry: Serves as a key reagent in analytical procedures, including as a precipitating agent for protein determination (Kjeldahl method) and in sample preparation.
• Dental & Oral Care Products: Utilized in formulations for its mild abrasive and tartar control properties.
• Water Treatment: Acts as a corrosion inhibitor and scale control agent in industrial water systems.
• Catalyst & Chemical Intermediate: Used in organic synthesis and as a catalyst in specific polymerization and esterification reactions.
• Laboratory Research: A fundamental chemical for research in inorganic and material chemistry.

Basic Information

Item	Detail
Product Name	Metaphosphoric Acid
CAS No.	37267-86-0
Molecular Formula	HPO3
Molecular Weight	79.98 g/mol
Synonyms	Glacial Phosphoric Acid; Hydrogen Metaphosphate; Monophosphoric Acid (polymeric form); Phosphoric Acid, Meta-; Polyphosphoric Acids; Cyclotriphosphoric Acid (for specific cyclic forms); HPO3; Meta-Phosphorsäure (German)
EINECS	253-433-4

Quality Control

Our Metaphosphoric Acid is manufactured under a strict quality management system. Each batch undergoes comprehensive testing to ensure it meets the required specifications for purity, assay, and impurity profiles. We can supply products compliant with various pharmacopeial standards (e.g., USP, EP) or Food Chemicals Codex (FCC) based on customer requirements. A Certificate of Analysis (COA) is provided with every shipment to guarantee traceability and quality assurance.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at a controlled room temperature (15-25°C). This product is hygroscopic (moisture-sensitive). Keep the container tightly sealed when not in use to prevent absorption of atmospheric moisture, which can affect product quality and handling properties.

Specification

Item	Specification
Appearance	White crystalline solid or glassy lumps
Identification (IR)	Conforms
Assay (as HPO3)	≥ 98.0 %
Water Insoluble Matter	≤ 0.05 %
Chloride (Cl)	≤ 0.005 %
Sulfate (SO4)	≤ 0.02 %
Heavy Metals (as Pb)	≤ 10 ppm
Iron (Fe)	≤ 0.005 %
Arsenic (As)	≤ 3 ppm

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