Molybdenum Disulfide MoS₂

Molybdenum Disulfide
Other Names: Molybdenite, MoS₂
CAS Number: 1317-33-5
Sum Formula: MoS₂
Molar Mass: 160.07 g/mol
Appearance: Black to dark gray crystalline powder with metallic sheen

Molybdenum disulfide is an inorganic compound and the naturally occurring form of molybdenite. It is structurally similar to graphite, with a layered lattice that allows easy slippage between planes, giving it excellent lubricating properties. It is widely used in lubricants, coatings, and as a solid additive in composite materials.

Chemical and Physical Properties
Density: 5.06 g/cm³
Melting Point: ~1,185°C
Boiling Point: Decomposes
Solubility: Insoluble in water and most solvents
Crystal Structure: Hexagonal, layered
Stability: Chemically stable; resistant to oxidation under normal conditions

Applications
Used as a solid lubricant in mechanical systems and high-performance machinery
Additive in oils, greases, and coatings for wear reduction
Applied in aerospace, automotive, and heavy industry components
Utilized as a catalyst and in tribological research
Employed in electronics and nanotechnology as a 2D material

Safety

Not a hazardous substance or mixture according to Regulation (EC) No 1272/2008.

First Aid Measures
Eye Contact: Rinse with water for several minutes. Seek medical attention if irritation occurs
Skin Contact: Wash with soap and water
Inhalation: Move to fresh air. Seek medical attention if symptoms persist
Ingestion: Rinse mouth with water. Seek medical help if discomfort develops

Handling and Storage
Store in a tightly sealed container in a cool, dry, and well-ventilated place
Avoid dust formation; handle under fume hood if possible
Keep away from strong oxidizing agents