Tungsten Disulfide丨CAS 12138-09-9

Product Introduction:

Catalog No.: SS123883
CAS No.: 12138-09-9
WS2 content(As W,wt): 99.9%min
Product Name: Tungsten disulfide
Certificate: ISO9001
Molecular Formula: WS2
Molecular Weight: 248
Synonym(s): Tungsten(IV) sulfide; Tungsten sulfide (WS2); Tungsten disulphide

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Technical Parameters

Description

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Specifications

Appearance:	Gray-black powder
WS₂ content (As W, wt):	99.9% min
W content (In WS₂, wt):	73.77%–74.27%
Fe (wt):	0.003% max
Cd (wt):	0.002% max
Cu (wt):	0.003% max
Mg (wt):	0.002% max
Mo (wt):	0.002% max
Pb (wt):	0.002% max
TS (wt):	0.03% max
H₂O (wt):	0.1% max
D50:	10±5 μm

Manufacturing Information

Parameter	Specification
Capacity	10MT/year
Frequency
Main Export Countries
Capacity/Batch
Experience	Production since 2015
Stock

Applications

1. Solid Lubricant

Industrial Machinery: WS₂ is widely used as a dry lubricant for components operating under high temperature (up to ~500°C) or vacuum conditions, where oil or grease cannot be used.

Aerospace and Automotive: Applied as a coating or additive in parts such as gears, bearings, pistons, and valves to reduce wear and friction.

Mold Release Agent: Used in plastic and rubber molding processes to facilitate easy demolding and extend mold life.

2. Additive in Greases and Oils

Improves the anti-wear, extreme pressure, and load-carrying properties of traditional lubricants.

Ensures longer service life of lubricated parts under extreme environments.

3. Nanotechnology and Electronics

2D Materials Research: As a member of the TMD family, WS₂ nanosheets are studied for applications in field-effect transistors, photodetectors, and flexible electronics.

Energy Storage: Used in lithium-ion battery electrodes and supercapacitors due to its layered structure and high surface area.

Catalysis: Explored as a hydrodesulfurization catalyst and in other electrocatalytic processes like hydrogen evolution reaction (HER).

4. Coatings and Films

Vacuum Coatings: Thin WS₂ films are applied via PVD (physical vapor deposition) or CVD (chemical vapor deposition) for durable, low-friction surfaces.

Biomedical Devices: Investigated for biocompatible coatings that reduce friction in implants and surgical tools.

Benefits

Exceptional Lubricity: Coefficient of friction as low as 0.03 under dry conditions.

High Temperature Stability: Effective performance up to ~500°C in air and even higher in inert atmospheres.

Chemically Inert: Stable against most acids and solvents, enabling use in harsh chemical environments.

Anti-Wear and Load Resistance: Enhances mechanical durability of components.

Nanomaterial Potential: Tunable electrical, optical, and mechanical properties for advanced functional devices.

Conclusion

Tungsten disulfide (CAS 12138-09-9) is a high-performance material offering outstanding lubrication and mechanical protection in extreme conditions. Its role as a solid lubricant and nanomaterial has led to increasing use in aerospace, automotive, manufacturing, electronics, and energy sectors. With the advancement of nanotechnology and surface engineering, WS₂ continues to gain attention for cutting-edge applications where conventional materials fall short.