Sulfide Powder

Molybdenum Disulfide MoS2 Powder CAS 1317-33-5

Item No.: TR
Molybdenum disulfide is the main component of molybdenite. Black solid powder with metallic luster. Chemical formula MoS₂, melting point 1185℃, density 4.80g/cm³ (14℃), Mohs hardness 1.0~1.5.
Particle size: 80nm, 1.5 microns, 5 microns
Purity: 99%
Molybdenum Disulfide Properties
About Molybdenum Disulfide MoS2 Powder:
Molybdenum disulfide (MoS2) is the main component of molybdenite. Black solid powder with a metallic luster. Chemical formula MoS2, melting point 1185°C, density 4.80g/cm3 (14°C), Mohs hardness 1.01.5. It starts to decompose at 1370°C and decomposes into metallic molybdenum and sulfur at 1600°C. It starts to be oxidized when heated at 315°C in the air, and the temperature rises and the oxidation reaction accelerates. Molybdenum disulfide is insoluble in water, dilute acid and concentrated sulfuric acid. It is generally insoluble in other acids, alkalis and organic solvents, but it is soluble in aqua regia and boiling concentrated sulfuric acid. Slowly oxidized at 400 ℃ to generate molybdenum trioxide:
2MoS2+ 7 O2→ 2 MoO3 + 4 SO2 can be used to test the generated molybdenum trioxide with ferrotitanium reagent. First, the product is treated with sodium hydroxide or potassium hydroxide solution (the principle is to convert molybdenum trioxide into molybdate), and then the titanium iron reagent solution is added dropwise, which will react with the generated sodium molybdate or potassium molybdate to produce gold Yellow solution. This method is very sensitive, and trace amounts of molybdate can be detected. And if there is no molybdenum trioxide generated, the solution will not produce golden yellow, because molybdenum disulfide does not react with sodium hydroxide or potassium hydroxide solution.
Molybdenum disulfide can react with chlorine when heated to produce molybdenum pentachloride:
2 MoS2+ 7 Cl2→ 2 MoCl5+ 2 S2Cl2
Molybdenum disulfide and alkyl lithium react under control to form an intercalation compound (interlayer compound) LixMoS2. If it reacts with butyllithium, the product is LiMoS2.
Molybdenum disulfide has a high content of active sulfur, which is easy to cause corrosion to copper. It is discussed in many books and papers on lubricant additives. In addition, when the parts made of copper and its alloys need to be lubricated, it is not impossible to use molybdenum disulfide lubricating products, but also to add copper corrosion inhibitors. Feel free to send an inquiry to get the latest price if you would like to buy Molybdenum Disulfide MoS2 Powder in bulk.

Features of Molybdenum Disulfide MoS2 Powder:
1. Molybdenum Disulphide CAS 1317-33-5 Nanoparticles (Nano MoS2) is shiny dark gray powder which has very good chemical stability and thermal stability.
2. Dissolved in aqua regia and concentrated sulfuric acid, insoluble in water and dilute acid; No general chemical reaction with metal surface; Not erode the rubber material;
3. Can be used for processing and storage of spare parts; Maintenance lubrication adhesion; can form a highly efficient dry lubricating film; Is less wear and friction reduction technology.. 

Analysis of Molybdenum Disulfide MoS2 Powder:
MoS2 MoO3 Insolubles Fe SiO2 H2O Oil Acid Value
99% 0.05% 0.26% 0.14% 0.05% 0.08% 0.10% 0.54

How is Molybdenum Disulfide MoS2 Powder produced?
Natural law
MoS2 can be prepared by the natural method, namely the molybdenite concentrate purification method, which is to remove the acid-insoluble matter in the molybdenite concentrate, SiO2, Fe, Cu, by subjecting high-quality molybdenum concentrate to certain physical and chemical actions. Ca, Pb and other impurities are further refined to obtain nano-MoS2. However, the purity of the nano-MoS2 produced by the natural method is not high, and the purification technology needs to be further improved. When the temperature is lower than 400℃, it is recommended to use the most expensive MoS2 when working in ordinary atmosphere. It has lubricating ability below 1300℃, and it is recommended to use the cost-based MoS2.
Chemical synthesis
The synthetic method can produce sulfides with high purity, less impurities, and fine particle size, and can prepare sulfides that meet different functional requirements. Therefore, the production of nano sulfides by synthetic methods has always attracted much attention. There are many methods for preparing nano-MoS2, such as ammonium tetrathiomolybdate thermal decomposition method, hydrogen sulfide or sulfur vapor reduction method, high-energy ball milling method, carbon nanotube space confinement method, hydrothermal synthesis method, high-energy physical method and chemical method combination and many more.

Applications of Molybdenum Disulfide MoS2 Powder:
Molybdenum disulfide is diamagnetic, can convert linear photoconductors and semiconductors with P-type or N-type conductivity, and has the functions of rectification and energy conversion.
Molybdenum disulfide can also be synthesized as a catalyst for hydrocarbon dehydrogenation.
Molybdenum disulfide is also known as "the king of advanced solid lubricants".
Molybdenum disulfide is a solid powder made from natural molybdenum concentrate chemically purified by changing the molecular structure.
Molybdenum disulfide has good dispersibility and does not need to be added. It can be added to various greases to form a colloidal state and will never replace it, thereby increasing the lubricity and extreme pressure of the grease.
Molybdenum disulfide is also suitable for high temperature, high pressure, high viscosity and high load mechanical working conditions to extend the service life of the equipment.
The main function of molybdenum disulfide as a friction material is to reduce friction at low temperatures, increase friction at high temperatures, and reduce combustion loss. Easily volatilize in the friction material.
Anti-friction: The size of disulfide particles formed by supersonic jet pulverization can reach 325-2500 mesh, the particle hardness is 1-1.5, and the friction coefficient is 0.05-0.1, so it can be used in friction materials to take advantage of the anti-friction effect;
Increased friction: Molybdenum disulfide is not conductive, and silicon carbide, molybdenum disulfide, molybdenum trisulfide and molybdenum trioxide are present. When the temperature of the friction material rises sharply due to friction, the shrinking molybdenum trioxide particles gradually heat up and expand, thereby increasing the friction in the axial direction.
Antioxidant: Molybdenum disulfide is obtained through a comprehensive chemical purification reaction, and its pH value changes 7-8, slightly alkaline. It covers the surface of the friction material, which can protect other materials from oxidation, especially making it difficult for other materials to move and enhancing adhesion.

Storage Condition of Molybdenum Disulfide MoS2 Powder:
Damp reunion will affect MoS2 powder dispersion performance and using effects, therefore, Molybdenum Disulfide MoS2 Powder powder should be sealed in vacuum packing and stored in cool and dry room, the Molybdenum Disulfide MoS2 Powder can not be exposure to air. In addition, the Molybdenum Disulfide powder should be avoided under stress.

Packing & Shipping of Molybdenum Disulfide MoS2 Powder:
We have many different kinds of packing which depends on the Molybdenum Disulfide MoS2 Powder quantity.
Molybdenum Disulfide MoS2 Powder packing: vacuum packing, 100g, 500g or 1kg/bag, 25kg/barrel, or as your request.
Molybdenum Disulfide MoS2 Powder shipping: could be shipped out by sea , by air, by express as soon as possible once payment receipt.

Molybdenum Disulfide Properties

Other Names molybdenum sulfide, molybdenum disulphide,
MoS2 powder, moly disulfide
CAS No. 1317-33-5
Compound Formula MoS2
Molecular Weight 160.07
Appearance Black Powder
Melting Point 1185 °C
Boiling Point N/A
Density 5.06 g/cm3
Solubility in H2O Insoluble
Storage Temperature Ambient temperatures
Exact Mass 161.849549
Monoisotopic Mass 161.849549

Molybdenum Disulfide Health & Safety Information

Signal Word Warning
Hazard Statements H315-H319-H335
Hazard Codes Xi
Risk Codes N/A
Safety Statements N/A
RTECS Number QA4697000
Transport Information NONH for all modes of transport
WGK Germany 3
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