Description

Ammonium Paratungstate is a high-purity, white crystalline powder that serves as a critical intermediate in the production of tungsten metal and its compounds. Its controlled chemical composition and purity are essential for ensuring the final quality and performance of downstream tungsten products. This material is indispensable for manufacturers in the metallurgical, chemical catalyst, and advanced ceramics industries, where precise material properties are non-negotiable.

Application

• Primary Precursor for Tungsten Products: The principal raw material for manufacturing tungsten metal powder, tungsten trioxide (WO3), and tungsten carbide (WC) via calcination and reduction processes.
• Catalyst Manufacturing: Used in the synthesis of catalysts for petroleum refining, hydrodesulfurization, and other industrial chemical processes.
• Ceramics and Pigments: Acts as a source of tungsten in the production of specialty ceramics, glass, and yellow ceramic pigments.
• Fireproofing and Radiation Shielding: Incorporated into materials requiring high density and thermal stability for fire-resistant fabrics and radiation shielding applications.
• Chemical Synthesis: Serves as a starting material or reagent in various inorganic and organometallic syntheses within research and development.
• Electronics and Semiconductors: Used in the deposition of thin films and in the production of components where tungsten's electrical properties are required.

Basic Information

Product Name	Ammonium Paratungstate
CAS No.	11120-25-5
Molecular Formula	(NH4)10(H2W12O42)·4H2O or (NH4)10W12O41·5H2O
Molecular Weight	3042.37 g/mol (Anhydrous basis)
Synonyms	Ammonium Paratungstate (APT); Ammonium Tungstate; Ammonium Wolframate; Para-Ammonium Tungstate; APT; Diammonium Decatungstate; Ammonium 12-Tungstophosphate hydrate; UNII-9M3H7F6V4J
EINECS	234-364-9

Quality Control

Our Ammonium Paratungstate is produced under stringent quality management systems to ensure batch-to-batch consistency and high purity. Quality is verified through a comprehensive suite of analytical tests including X-ray diffraction (XRD), inductively coupled plasma (ICP) analysis, and loss on ignition (LOI). A Certificate of Analysis (COA) detailing purity, impurity profiles, and physical specifications is provided with every shipment to guarantee compliance with your technical requirements.

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 sealed to prevent absorption of moisture from the air, which can affect product quality and handling properties.

Specification

Item	Specification
Appearance	White crystalline powder
Identification (IR)	Conforms
Assay (as WO3)	≥ 88.5 %
Loss on Ignition (LOI)	10.0 - 12.0 %
Ammonia (NH3) Content	5.8 - 6.5 %
Particle Size (D50)	Contact for details
Heavy Metals (as Pb)	≤ 10 ppm
Insoluble Matter	≤ 0.01 %

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