Description

Ammonium Tetrathiotungstate is an inorganic sulfur-containing tungsten compound, serving as a crucial precursor for synthesizing tungsten disulfide (WS₂) and other advanced tungsten-based materials. Its value lies in providing a controlled, high-purity source of both tungsten and sulfur for the production of solid lubricants, catalysts, and semiconductor components. This chemical is essential for industries focused on materials science, including lubricant manufacturing, petrochemical catalysis, and electronic material development.

Application

• Solid Lubricant Production: As a key precursor for the synthesis of tungsten disulfide (WS₂), a high-performance dry lubricant used in aerospace, automotive, and heavy machinery.
• Catalyst Synthesis: Used in the preparation of hydrotreating and hydrocracking catalysts for the petrochemical industry to remove sulfur and nitrogen from fuels.
• Semiconductor & Electronics: Serves as a source material for depositing tungsten sulfide thin films in semiconductor devices and optoelectronic applications.
• Chemical Vapor Deposition (CVD): Acts as a precursor in CVD processes to create WS₂ coatings on various substrates for enhanced wear resistance.
• Research & Development: Utilized in academic and industrial R&D for exploring new tungsten chalcogenide compounds and nanomaterials.
• Additive Manufacturing: Investigated for use in producing specialized metal alloys and composite materials with unique tribological properties.

Basic Information

Product Name	Ammonium Tetrathiotungstate
CAS No.	13862-78-7
Molecular Formula	(NH₄)₂WS₄
Molecular Weight	348.10 g/mol
Synonyms	Ammonium tetrathiotungstate(VI); Diammonium tetrathiotungstate; Tetrathiotungstic acid, diammonium salt; Ammonium tungsten sulfide; (NH4)2WS4; Ammonium thiotungstate; WS₂ precursor
EINECS	Contact for details

Quality Control

Our Ammonium Tetrathiotungstate is manufactured under controlled conditions to ensure batch-to-batch consistency and high chemical purity. Quality is verified through a series of analytical tests including assay, impurity profiling, and physical characterization. A comprehensive Certificate of Analysis (COA) detailing purity, heavy metal content, and other critical parameters is provided with each 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 (moisture-sensitive) nature, the container must be kept sealed to prevent exposure to atmospheric humidity. Keep away from incompatible materials such as strong oxidizing agents.

Specification

Item	Specification
Appearance	Orange to red crystalline powder
Identification (IR)	Conforms
Assay (as (NH₄)₂WS₄)	≥ 98.0 %
Tungsten (W) Content	Contact for details
Sulfur (S) Content	Contact for details
Heavy Metals (as Pb)	≤ 20 ppm
Loss on Drying	≤ 2.0 %

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