Ammonium Metatungstate

W&Q Ammonium Metatungstate (AMT) is a high-purity water-soluble tungsten intermediate. It appears as white or slightly yellow crystalline powder, featuring ultra-high water solubility, stable chemical properties and low impurity content. Produced by advanced precision synthesis, purification and low-temperature crystallization processes, our AMT has uniform particle size and stable batch indicators. Different from conventional tungsten salts, it maintains stable solution state in high-concentration aqueous solution, and is widely used in catalyst manufacturing, surface coating, petrochemical industry and new energy materials.

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Model:
WO3 91%
Brand:
W&Q

1. Molecular Formula: H₂₈N₆O₄₁W₁₂

2. CAS NO.:12333-11-8

3. Molecular Weight:2975.44

4. Property:

W&Q's Ammonium Metatungstate is white or slight yellow crystalline powder. It has excellent water solubility and forms stable high-concentration aqueous solution at room temperature, insoluble in alcohol. The product has stable chemical properties, no deliquescence and no spontaneous combustion under normal temperature and pressure. It decomposes upon heating, widely used in petroleum catalysts, high-temperature coatings, electronic materials and tungsten fine chemicals.

5. Sepcification:WO₃91%

If you need complete technical data and detailed specifications, please contact us directly.

Email: wq@wqgroup.net

WeChat / WhatsApp / Mobile: 0086-13082360769

6. Packing: net 1000kg bag

ammonium metatungstate

USAGE

Application Area	Specific Uses
Production of Tungsten Catalysts	A major use is as a precursor for preparing tungsten-based catalysts (e.g., for hydrodesulfurization in oil refining) and catalyst supports.
Precursor to Tungsten Oxide	Its aqueous solution is an excellent source of tungsten for making high-purity tungsten trioxide (WO₃) via thermal decomposition.
Preparation of Metallic Tungsten	Through the oxide reduction pathway, it is used to produce fine and ultra-fine tungsten powder.
Chemical Source in Materials Science	Used for synthesizing tungsten-containing coatings, films (e.g., by spray pyrolysis or sol-gel methods), and other functional materials like phosphors.
Ceramics and Pigments	Serves as a raw material for tungsten bronzes and certain ceramic pigments.

For Manufacturers

Reduced processing time, lower energy costs, and more efficient use of equipment.
For Product Performance

Enhanced consistency, superior catalytic activity, finer metal powders, and higher-purity materials.
For R&D

A versatile and controllable molecular building block for advanced materials.

For Manufacturers

Reduced processing time, lower energy costs, and more efficient use of equipment.
For Product Performance

Enhanced consistency, superior catalytic activity, finer metal powders, and higher-purity materials.
For R&D

A versatile and controllable molecular building block for advanced materials.

FAQs

What is the main difference between AMT and APT?

·AMT (Ammonium Metatungstate): Extremely high solubility in water and even in acidic solutions. Often used for liquid-phase processes like catalyst impregnation or making coatings.

·APT (Ammonium Paratungstate): Has much lower solubility in water and precipitates in acidic conditions. It's the traditional primary intermediate in tungsten refining, often processed via solid-state calcination.
What are the primary uses of AMT?

·Catalyst Manufacturing: The #1 use. Impregnating catalyst supports (e.g., for hydrotreating catalysts in oil refineries).

·Tungsten Oxide Production: Decomposes cleanly to high-purity tungsten trioxide (WO₃).

·Fine Tungsten Powder: WO₃ from AMT is reduced to produce fine/ultra-fine tungsten metal powder.

·Advanced Materials: Source of tungsten for coatings, ceramic pigments, phosphors, and functional films via spray pyrolysis or sol-gel methods.
Is AMT hazardous? What safety precautions are needed?

It is generally considered a low to moderate hazard chemical, but precautions are necessary:

·Inhalation: Avoid dust. Use local exhaust ventilation or respiratory protection.

·Skin/Eyes: Can cause irritation. Wear gloves and safety glasses.

·Ingestion: Harmful. Do not eat or drink where handled.

·Always consult the specific Safety Data Sheet (SDS) provided by your supplier for detailed handling, storage, and disposal procedures.