Description

Tungsten Sulfide (WS2) is an advanced inorganic solid lubricant and semiconductor material known for its layered structure and exceptional thermal stability. This compound is critical for applications requiring extreme pressure lubrication, wear resistance, and specific electronic properties. It is essential for manufacturers and R&D facilities in the aerospace, automotive, electronics, and industrial machinery sectors seeking to enhance performance and durability.

Application

• Solid Lubricants & Coatings: Used as an additive in greases, oils, and dry-film coatings for high-temperature and high-vacuum environments where liquid lubricants fail.
• Self-Lubricating Composites: Incorporated into polymers, metals, and ceramics to create components with inherent low friction and wear resistance.
• Catalysis & Hydrotreating: Serves as a catalyst or catalyst support in hydrodesulfurization (HDS) processes within the petrochemical industry.
• Semiconductor & Electronic Devices: Investigated for use in transistors, photodetectors, and as a component in two-dimensional (2D) material systems like heterostructures.
• Energy Storage: Explored as an electrode material or catalyst in lithium-sulfur batteries and hydrogen evolution reactions.
• Mechanical Parts: Applied to bearings, gears, and cutting tools to reduce friction, prevent galling, and extend service life.

Basic Information

Product Name	Tungsten Sulfide
CAS No.	12138-09-9
Molecular Formula	WS2
Molecular Weight	247.98 g/mol
Synonyms	Tungsten(IV) sulfide; Tungsten disulfide; WS2; Tungsten disulphide; Dithioxotungsten; EINECS 235-243-3
EINECS	235-243-3

Quality Control

Our Tungsten Sulfide is manufactured under controlled conditions and subjected to rigorous analytical testing to ensure batch-to-batch consistency and compliance with defined specifications. We provide comprehensive Certificates of Analysis (COA) detailing purity, particle size distribution, and impurity profiles. Quality management adheres to ISO 9001 standards, and we support customer-specific qualification 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). Keep away from strong oxidizing agents. The product is moisture-sensitive; ensure containers are sealed after use to minimize exposure to atmospheric humidity.

Specification

Item	Specification
Appearance	Gray to black powder
Identification (XRD)	Conforms to WS2 structure
Assay (Tungsten as WS2)	≥ 99.0%
Particle Size (D50)	1 - 10 µm (or as specified)
Moisture Content	≤ 0.5%
Trace Metals (ICP)	Contact for details

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