Description

Ammonium Metatungstate is a high-purity, water-soluble tungsten compound, essential as a versatile precursor in advanced materials manufacturing. Its controlled chemical composition and high solubility make it a critical intermediate for producing high-performance tungsten-based products. This material is indispensable for industries requiring precise tungsten chemistry, including catalysts, ceramics, and specialized metal alloys.

Application

• Production of tungsten metal powders and tungsten carbide for cutting tools and wear-resistant parts.
• Key precursor for manufacturing petroleum refining catalysts, including hydrotreating and hydrocracking catalysts.
• Preparation of tungsten oxide (WO3) for electrochromic devices, gas sensors, and photocatalysts.
• Raw material for phosphors and other specialty chemicals in the electronics industry.
• Used in the formulation of corrosion-resistant coatings and fireproofing agents.
• Intermediate in the synthesis of heteropoly acids and other complex inorganic compounds for research and industrial processes.

Basic Information

Product Name	Ammonium Metatungstate
CAS No.	12028-48-7
Molecular Formula	(NH4)6H2W12O40 • xH2O
Molecular Weight	Approx. 2956.3 (Anhydrous)
Synonyms	Ammonium Metatungstate Hydrate; Ammonium Tungstate Metallic; AMT; Ammonium Paratungstate (APT) conversion product; Hexaammonium Hydrogen Dodecatungstate; Dodecatungstic Acid Ammonium Salt
EINECS	234-722-4

Quality Control

Our Ammonium Metatungstate is manufactured under a stringent quality management system to ensure batch-to-batch consistency and high chemical purity. We provide comprehensive Certificates of Analysis (COA) detailing key parameters such as tungsten oxide (WO3) content, ammonium content, and impurity profiles. Our production adheres to relevant industry standards, and specifications can be tailored to meet specific customer requirements for research or industrial applications.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated place at room temperature (15-25°C). This product is hygroscopic (moisture-sensitive) and must be kept in a dry environment to prevent caking and degradation. Keep away from incompatible materials.

Specification

Item	Specification
Appearance	White or slightly yellow crystalline powder
Identification (IR)	Conforms
Assay (as WO3)	≥ 85.0 %
Solubility (in Water)	Clear, complete solution
Chloride (Cl)	≤ 0.01 %
Sulfate (SO4)	≤ 0.02 %
Heavy Metals (as Pb)	≤ 0.002 %
Moisture (Loss on Drying)	≤ 2.0 %

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