Product Description
MK-MoS2-45 is a molybdenum disulfide (MoS2) powder with an average particle size of about 4.5 micron (technical fine grade) and a purity of 98.5%+. It is available for industrial and laboratory testing as a dry/solid lubricant and lubricant additive – in greases, oils, polymers, paints and coatings, as well as high-load applications and vacuum-related lubrication.
Technical Specifications
| Product number | MK-MoS2-45 |
|---|---|
| Purity | 98.5%+ |
| Average particle size | ~4.5 micron APS |
| Grade | Technical fine grade |
| Chemical formula | MoS2 |
| CAS number | 1317-33-5 |
| Molecular weight | 160.07 g/mol |
| Physical form | Grey powder |
| Crystal structure | Hexagonal lamellar |
| True material density | 5.06 g/cm³ at 25°C |
| Available packs | 1 lb, 10 lbs and 25 kg (55 lbs) |
| Product use | Industrial lubricants and laboratory research |
APS refers to the average particle size and should not be confused with a total particle-size distribution. Test data specific to a grade or batch can be supplied on request.
Key MoS2 Properties and Applications
Key Material Characteristics
- Dry solid lubricant with a hexagonal lamellar structure
- Forms an effective low-friction film in the absence of moisture
- Can be assessed for lubrication in inert atmosphere and high vacuum
- Extreme-pressure behaviour makes it a candidate for high-load applications
- Usable in oil, solvent, paint and fuel systems
Common Application Areas
- Lubricating greases and oil additive compositions
- Dry-film and solid lubricant applications
- Additive formulations for plastics and polymers
- Paints and other coating systems
- Cold metal forming and other high-load lubrication applications
- Lubrication systems in vacuum and inert atmospheres
Final suitability is dependent on particle dispersion, concentration, carrier medium, substrate, load, temperature, humidity and working conditions. Test the application before putting it into production.
General MoS2 Reference Values
| Load-bearing ability | Up to 250,000 psi |
|---|---|
| Lubrication temperature range – ambient | −185°C to 350°C |
| Lubrication temperature range – vacuum | −185°C to 1,100°C |
| Thermal behaviour in air | COF below 0.1 at 316°C; increases to 0.5 at 594°C |
These are generic MoS2 product-family reference values from the brochure, not batch-specific test results for MK-MoS2-45. Performance in service depends on formulation, environment, substrate, load and operating conditions.
Safety, Handling and Storage
Store MoS2 powder in a tightly closed container in a dry, well-ventilated place. Do not let it get into the eyes or on the skin, and avoid dust or aerosol formation. Provide adequate ventilation where dust is generated, and use appropriate gloves and eye protection when handling.
The standard MK-MoS2-xxx / MKN-MoS2-xxx SDS classifies molybdenum disulfide as Acute Toxicity (Inhalation), Category 4, with hazard statement H332: Harmful if inhaled. Possible irritation of the respiratory tract, skin and eyes is also noted. DOT, IMDG and IATA transport status is listed as not dangerous goods. Read the SDS before use.
Download Product Brochure (PDF) Download Safety Data Sheet (PDF)
The brochure and SDS contain common information for multiple molybdenum disulfide powder grades.
Frequently Asked Questions
What does ~4.5 micron APS mean?
APS stands for average particle size. MK-MoS2-45 is listed at around 4.5 micron APS (technical fine grade), which is not the same as a complete particle-size distribution.
What applications can MK-MoS2-45 be evaluated for?
It may be evaluated for dry lubrication and as an additive in greases, oils, polymers, paints and coatings, including selected high-load, metal-forming and vacuum applications.
Is MoS2 suitable for high-load and vacuum lubrication?
The product-family brochure lists load-bearing ability up to 250,000 psi and good lubricity under high vacuum. Performance should still be validated for the intended application.
How should molybdenum disulfide powder be stored and handled?
Keep the container tightly closed in a dry, well-ventilated place. Avoid generating dust and avoid skin or eye contact. Use suitable ventilation and the personal protective equipment described in the SDS.
Are the brochure and SDS specific to the 4.5 micron grade?
No. The brochure and SDS are common to multiple grades of MoS2 powder. The product number, purity, particle size, SKU, price and pack options on this page relate to MK-MoS2-45.
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
