Product Name: TUNGSTEN SULFIDE
CAS: 12138-09-9
MF: S2W
MW: 247.97
EINECS: 235-243-3
Melting point: 1480 °C
Density: 7.5 g/mL at 25 °C(lit.)
RTECS: YO7716000
Form: powder
Specific Gravity: 7.5
Color: Dark gray
Water Solubility: Slightly soluble in water.
| The average particle size （nm） | 100 | 1000 |
| Purity % | >99.9 | >99.9 |
| Specific surface area （m2/g） | 50 | 13 |
| Volume density （g/cm3） | 0.25 | 0.97 |
| Density （g/cm3） | 3.45 | 3.45 |
| Appearance | Dark powder | |
1. Nano WS2 is mainly used as a petroleum catalyst: it can be used as a hydrodesulfurization catalyst, and it can also be used as a catalyst for polymerization, reforming, hydration, dehydration and hydroxylation. It has good cracking performance and stable and reliable catalytic activity. Long service life and other characteristics are very popular among petroleum refineries;
2. In the preparation technology of inorganic functional materials, nano WS2 is a new type of high-efficiency catalyst. Due to the new compound that can form a sandwich structure, nano WS2 can be made into a monolayer two-dimensional material, and can be restacked as needed to have a very large The new granular material of the "floor room structure" of the inner space, and intercalation materials can be added during the re-stacking process to make it a catalyst or sensitive display and superconducting material. Its huge internal surface area is easy to be mixed with accelerators. Become a new type of high-efficiency catalyst. The Nagoya Industrial Research Institute of Japan discovered that nano-WS2 has a great catalytic effect in the conversion of CO2 to CO, which will promote the development of carbon cycle technology and pave the way for improving the trend of global warming;
3. WS2 can be used as solid lubricants, dry film lubricants, self-lubricating composite materials: Nano WS2 is the best solid lubricant, with a friction coefficient of 0.01～0.03, a compressive strength of up to 2100 MPa, and acid and alkali corrosion resistance. Good load resistance, non-toxic and harmless, wide use temperature, long lubrication life, low friction factor and other advantages. In recent years, the ultra-low friction and wear shown by the solid lubricant hollow fullerene nano WS2 has attracted people’s attention. Significantly reduce the friction factor and increase the life of the mold;
4. Nano WS2 is a very important additive for manufacturing high-performance lubricants. Studies have found that adding a proper amount of WS2 nanoparticles to lubricating oil can greatly improve the lubricating performance of lubricating oil, reduce friction factor by 20%-50%, and increase oil film strength by 30%-40%. Its lubricating performance is far better than nano-MoS2 . Under the same conditions, the lubricating performance of the base oil added with nano WS2 is significantly better than that of the base oil added with conventional particles, and it has good dispersion stability. The results of the study show that the lubricants added with nano-particles combine the advantages of fluid lubrication and solid lubrication, which is expected to achieve lubrication from room temperature to high temperature (over 800 ℃). Therefore, nano WS2 can be used as an additive to synthesize a new lubricating system, which has broad application prospects;
5. It can also be used as anode of fuel cell, anode of organic electrolyte rechargeable battery, anode of sulfur dioxide oxidized in strong acid and anode of sensor, etc.;
6. Used to make nano-ceramic composite materials;
7. It is a good semiconductor material.
This product should be sealed and stored in a dry and cool environment. It should not be exposed to the air for a long time to prevent agglomeration due to moisture, which will affect the dispersion performance and use effect. In addition, avoid heavy pressure and do not contact with oxidants. Transport as ordinary goods.
1. Container: Store WS₂ in a sealed container to prevent moisture absorption and contamination. The container should be made of a material compatible with sulfides, such as glass or certain plastics.
2. Environment: Keep the storage area cool, dry and well-ventilated. Avoid exposure to direct sunlight and extreme temperatures, as these conditions will affect the stability of the material.
3. Label: Clearly label containers with the chemical name, hazard information, and receipt date. This helps ensure proper handling and identification.
4. Separation: Store tungsten sulfide away from incompatible substances (such as strong oxidants) to prevent any potential reactions.
5. Safety Precautions: Follow any specific safety guidelines provided in the Tungsten Sulfide Material Safety Data Sheet (MSDS). Ensure that you are wearing appropriate personal protective equipment (PPE) when handling the material.
Tungsten sulfide (WS₂) is generally considered to have low toxicity and is not considered hazardous to humans under normal handling conditions. However, like many materials, it may present a risk if inhaled as a dust or in prolonged contact with the skin.
Here are some safety considerations:
1. Inhalation: Inhalation of fine particles or dust of tungsten sulfide can be harmful and may cause respiratory problems. Use proper ventilation and protective equipment when handling powdered materials.
2. Skin Contact: Although WS₂ is not highly reactive, prolonged skin contact with the powder may cause irritation in some individuals. It is recommended to wear gloves when handling.
3. Environmental Impact: The impact of tungsten sulfide on the environment has not been extensively studied, but like any chemical, it should be handled responsibly to prevent pollution.
When transporting tungsten sulfide (WS₂), it is important to follow specific precautions to ensure safety and regulatory compliance. Here are some key considerations to take into account:
1. Regulatory Compliance: Check and follow local, national, and international regulations regarding the transportation of chemical substances. This includes following guidelines set by organizations such as the U.S. Department of Transportation (DOT) or the International Air Transport Association (IATA) for air transportation.
2. Packaging: Use appropriate packaging materials that are compatible with tungsten sulfide. Make sure the container is sturdy, airtight, and moisture-proof. Use an inner container (such as a plastic bag or bottle) inside the outer packaging to prevent leakage.
3. Label: Clearly label the package with the correct shipping name, hazard symbols, and any necessary handling instructions. Include a Material Safety Data Sheet (MSDS) during transportation to inform handlers of the material’s properties and hazards.
4. Handling Precautions: Train personnel involved in the transportation process on how to properly handle tungsten sulfide and understand emergency procedures. Ensure they are equipped with appropriate personal protective equipment (PPE).
5. Avoid dust generation: Take precautions to minimize dust generation during packaging and transportation, as inhalation of fine particles can be harmful to health.
6. Temperature Control: If applicable, ensure shipping conditions maintain a stable temperature to prevent any degradation of the material.
7. Emergency Procedures: Have emergency procedures in place in case of a leak or accident during transport. This includes having a spill kit and first aid supplies ready.