Product Description
MK-MoS2-125 is a technical grade molybdenum disulfide (MoS2) powder, 98.5%+ pure, with an average particle size of about 12.5 micron. It is offered for industrial and laboratory evaluation as a dry/solid lubricant and lubricant additive – for greases, oils, polymers, paints and coatings, along with high-load applications and vacuum-related lubrication.
Technical Specifications
| Product number | MK-MoS2-125 |
|---|---|
| Purity | 98.5%+ |
| Average particle size | ~12.5 micron APS |
| Grade | Technical 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 is the average particle size and is not meant to represent a full particle-size distribution. Additional test data for a specific grade or batch can be provided upon request.
Key MoS2 Properties and Applications
Key Material Characteristics
- Dry/solid lubricant with a hexagonal lamellar structure
- Good film-forming and lubricity properties where moisture is absent
- A candidate for lubrication evaluation in inert atmosphere and high vacuum
- Extreme-pressure lubricant behaviour in high-load applications
- Compatible with oil, solvent, paint and fuel systems
Common Application Areas
- Lubricating additive formulations for greases and oils
- 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 depends on particle dispersion, concentration, carrier medium, substrate, load, temperature, humidity and operating conditions. Application testing before production use is recommended.
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 general MoS2 product-family reference values from the brochure, not batch-specific test results for MK-MoS2-125. Performance may vary with formulation, environment, substrate, load and operating conditions.
Safety, Handling and Storage
Store MoS2 powder in a tightly closed container in a dry, well-ventilated area. Avoid contact with skin and eyes, and avoid generating dust or aerosols. Where dust is generated, provide sufficient exhaust ventilation, and use suitable gloves and eye protection when handling.
Molybdenum disulfide is listed in the common MK-MoS2-xxx / MKN-MoS2-xxx SDS as Acute Toxicity (Inhalation), Category 4, with hazard statement H332: Harmful if inhaled. Possible irritation of the respiratory tract, skin and eyes is also included. 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 ~12.5 micron APS mean?
APS means average particle size. MK-MoS2-125 is listed at around 12.5 micron APS (technical grade); this is not a complete particle-size distribution.
What applications can MK-MoS2-125 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. Validate performance 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 12.5 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-MoS2-125.
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
