Description

Sodium Metatungstate Hydrate is a high-density, water-soluble inorganic salt of tungsten. This compound is valued for its ability to form stable, heavy aqueous solutions, making it an essential material for density separation and calibration processes across multiple industries. It is primarily utilized by laboratories, material scientists, and industrial manufacturers requiring precise and inert heavy liquids.

Application

• Preparation of high-density aqueous solutions for mineral separation and density gradient centrifugation.
• Used as a calibration standard for density meters and in geological sample analysis.
• Acts as a heavy liquid medium in the recovery and purification of precious minerals and synthetic diamonds.
• Employed in ceramic and catalyst manufacturing as a source of tungsten.
• Utilized in research and development for studying particle behavior in fluid dynamics.
• Potential use as a non-toxic alternative to halogenated heavy liquids in environmental and safety-conscious applications.

Basic Information

Item	Details
Product Name	Sodium Metatungstate Hydrate
CAS No.	314075-43-9
Molecular Formula	Na6[H2W12O40]·xH2O
Molecular Weight	Contact for details (Anhydrous approx. 2956.2 g/mol)
Synonyms	Sodium Metatungstate; Sodium Polytungstate; SMT; Sodium Tungstate(VI) hydrate; Sodium 12-Tungstometallate Hydrate; Heavy Liquid Sodium Metatungstate; Na6H2W12O40 Hydrate
EINECS	Contact for details

Quality Control

Our Sodium Metatungstate Hydrate is manufactured under a strict quality management system. Each batch undergoes rigorous analytical testing to ensure consistent purity, density, and solubility performance. Certificates of Analysis (COA) documenting key parameters are available upon request to support your quality assurance protocols.

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). Due to its hygroscopic nature, the container must be kept tightly sealed after opening to prevent moisture absorption and caking.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms
Assay (as Na6H2W12O40)	≥ 98.0 %
Density of Aqueous Solution (20°C)	≥ 3.0 g/cm³ (Custom concentrations available)
pH (5% solution)	3.0 - 5.0
Water Solubility	Completely soluble
Chloride (Cl)	≤ 0.01 %
Sulfate (SO4)	≤ 0.01 %

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