Products Description of Molybdenum Disulfide CAS#1317‑33‑5
As the primary constituent of molybdenite, molybdenum disulfide is a lead‑grey to black odourless solid powder that delivers a slippery, greasy texture. It crystallises within the hexagonal or orthorhombic system, possesses graphite‑analogous structural features and displays a distinctive metallic sheen.
Functioning as a premium solid‑lubricating substance, molybdenum disulfide delivers superior lubricating performance for machinery running under extreme circumstances: wide temperature fluctuations, heavy mechanical loads, high rotational velocity, chemical corrosive exposure and ultra‑high‑vacuum surroundings. It can serve as a friction adjuster (friction‑reducing additive), anti‑wear component, extreme‑pressure filler and oxidation inhibitor.
This material gains extensive industrial adoption. In the aviation sector, it provides lubrication capable of resisting vacuum and radiation impacts. Further application fields cover automobile manufacturing, general machinery, mining operations, national‑defence‑related sectors, shipbuilding and heavy‑industry scenarios including bearings, gear systems and component assembly workflows. Besides acting as an additive for diverse lubricant formulations, it participates in manufacturing molybdenum‑based compounds, hydrodesulfurization catalysts, gas‑storage media and photovoltaic cell raw materials.
Molybdenum disulfide Chemical Properties
| Melting point | 2375 °C |
| density | 5.06 g/mL at 25 °C(lit.) |
| solubility | insoluble in H2O; soluble in concentrated acid solutions |
| form | powder |
| color | Gray to dark gray or black |
| Specific Gravity | 4.8 |
| Odor | odorless |
| Water Solubility | Soluble in hot sulfuric acid, and aquaregia. Insoluble in water, concentrated sulfuric acid and dilute acid. |
| Merck | 146236 |
| Boiling point | 100°C (water) |
| Exposure limits | ACGIH: TWA 10 mg/m3; TWA 3 mg/m3 |
| NIOSH: IDLH 5000 mg/m3 | |
| Stability: | Stable. Incompatible with oxidizing agents, acids. |
| InChIKey | CWQXQMHSOZUFJS-UHFFFAOYSA-N |
| CAS DataBase Reference | 1317-33-5(CAS DataBase Reference) |
| EPA Substance Registry System | Molybdenum sulfide (MoS2) (1317-33-5) |
| Bandgap | 1.23 eV |
| Electronic properties | 2D Semiconductor |
| Safety Statements | 22-24/25 |
| WGK Germany | - |
| RTECS | QA4697000 |
| TSCA | Yes |
| HS Code | 28309090 |
| Hazardous Substances Data | 1317-33-5(Hazardous Substances Data) |
| Toxicity | LC50 inhalation in rat: > 2820mg/m3/4H |
Product Application of Molybdenum Disulfide CAS#1317-33-5
Molybdenum disulfide enjoys broad deployment across automotive and mechanical sectors as a high-performance solid lubricant. It delivers reliable lubrication protection for equipment subjected to alternating high and low temperatures, heavy loads, rapid rotation, chemical corrosion and contemporary ultra-high-vacuum environments.
When blended into lubricating oils, greases, PTFE, nylon, paraffin wax and stearic acid, this additive optimises lubricity and cuts frictional resistance. Such incorporation helps lengthen relubrication cycles, curtail operational expenditure and optimise on-site working conditions. Moreover, molybdenum disulfide can act as a parting agent for non-ferrous metals and serve as a lubricating medium for forging moulds.
