Product Description
MK-WS2-06 is a tungsten disulfide (WS2) powder with an average particle size of 0.6 micron and a purity of 99.9%. It is offered for industrial and laboratory evaluation as a solid lubricant and lubricant additive – for dry-film lubrication, oil and liquid lubricant systems, high-load applications, coatings and compatible resins or plastics.
Technical Specifications
| Product number | MK-WS2-06 |
|---|---|
| Purity | 99.9% |
| Average particle size | 0.6 micron APS |
| Chemical formula | WS2 |
| CAS number | 12138-09-9 |
| Molecular weight | 247.97 g/mol |
| Physical form | Powder |
| Density | 7.5 g/cm³ at 25°C |
| Available packs | 1 lb, 10 lbs and 55 lbs (25 kg) |
| Product use | Lubricating additive; industrial and laboratory research |
APS is the average particle size; it is not to be confused with the particle-size distribution. Further grade/batch detail test data is available if required or requested.
Key WS2 Properties and Applications
Key Material Characteristics
- Very low friction solid lubricant
- Suitable for coated film applications under heavy load
- Well suited to high-temperature and vacuum lubrication assessment
- Compatible with oils, solvents, water, paint, and resin/plastic systems
Common Application Areas
- Dry-film lubrication of metal and plastic surfaces
- Additive in oils and liquid lubricant formulations
- Spray, buff or tumble coating applications
- Sliding and contact surfaces under high loads
- High-temperature and vacuum lubrication systems
- Formulations for paint, resin, plastic and compatible materials
Final suitability depends on particle dispersion, concentration, carrier medium, substrate, surface preparation, load, temperature and operating conditions. Testing before production use is recommended.
General WS2 Reference Values
| Coefficient of friction | 0.03 dynamic; 0.07 static |
|---|---|
| Load-bearing ability | 300,000 psi for coated film |
| Temperature range in normal atmosphere | −273°C to 650°C |
| Temperature range in vacuum | −188°C to 1,316°C |
These are general WS2 product-family reference values, not batch-specific test data for MK-WS2-06. Real-world performance depends on substrate, surface preparation, method of application and service conditions.
Safety, Handling and Storage
Store WS2 powder in a firmly closed container in a dry, well-ventilated area. Avoid contact with skin and eyes, and avoid generating dust or aerosols. Provide sufficient exhaust ventilation at the source of dust and wear suitable gloves and eye protection.
In the common MK-WS2-xxx / MKN-WS2-xxx SDS, tungsten disulfide is classified as a skin irritant (Category 2), a serious eye irritant (Category 2A) and a specific target organ toxicant – single exposure (Category 3) for the respiratory system. DOT, IMDG and IATA transport status is listed as not dangerous goods. Review the SDS before use.
Download Product Brochure (PDF) Download Safety Data Sheet (PDF)
The brochure and SDS contain common information for multiple tungsten disulfide powder grades.
Frequently Asked Questions
What does 0.6 micron APS mean?
APS refers to the average particle size. This grade has an average particle size of 0.6 micron, which should not be read as the complete particle-size distribution.
What applications can MK-WS2-06 be evaluated for?
It can be tested for dry-film lubrication, lubricant-additive systems, high-load sliding surfaces, high-temperature or vacuum lubrication, coatings and compatible resin or plastic formulations.
How can WS2 powder be applied?
Per the product-family brochure, WS2 powder may be blended into compatible liquid or material systems, and suitable surfaces can be coated by spraying, buffing or tumbling. Confirm final application parameters for your chosen procedure.
How should tungsten disulfide powder be stored and handled?
Keep the container firmly closed in a dry, well-ventilated location. Ensure adequate ventilation, avoid generating dust, and avoid skin and eye contact. Use the personal protective equipment indicated in the SDS.
Are the brochure and SDS specific to the 0.6 micron grade?
No. Common information is provided in the brochure and SDS for various grades of WS2 powder. The product number, purity, particle size, SKU, price and pack types mentioned on this page are applicable for MK-WS2-06.
Technical information notice: Product information is for preliminary evaluation only and does not guarantee performance or suitability. Review the current SDS, TDS, and product specifications, try a small sample first, and confirm suitability before bulk use. Read the full disclaimer
Product Videos
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Product Reviews
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WS2 powder
I used this 0.6 micron WS2 in my perkins 6.354.4 marine diesel engine at a rate of 8oz WS2 per oil change (10qts). The oil consumption dropped by 90% from a gallon every 100hours to a couple of cups. Been using this for years now and engine has 18k hours on it now. Wear on the cam has stopped, valves are still at the specified clearance after 8k hours of using this with every oil change. Be aware this settles out slowly in the pan, so start the engine at least every 3 weeks, which is good for the engine anyway.
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Tungsten Disulfide (WS2) Powder, 0.6 micron
Super
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Seller Review
I have ordered from 3 vendors, and Lower Friction is the only vendor that actually sent me the real stuff. Be careful there are fake vendors out here selling trash. Lower Friction is the real deal. 5 Stars, fast shipping and great customer service.
