Due to weak van der Waals interactions between the sheets of sulfide atoms, MoS2 has a low coefficient of friction. MoS2 in particle sizes of 1–100 µm is a common dry lubricant. Few alternatives exist that confer high lubricity and stability at up to 350 °C in oxidizing environments. Sliding friction tests of MoS2 using a pin-on-disc tester at low loads (0.1–2 N) give friction coefficient values of <0.1. MoS2 is often a component of blends and composites that require low friction. For example, it is added to graphite to improve sticking. Various oils and greases are used because they retain their lubricity even in cases of almost complete oil loss, thus finding use in critical applications such as aircraft engines. MoS2 forms a composite with improved strength and reduced friction when added to plastics. Polymers that may be filled with MoS2 include nylon (trade name Nylatron), Teflon, and Vespel. Self-lubricating composite coatings for high-temperature applications consist of molybdenum disulfide and titanium nitride, using chemical vapor deposition. Examples of applications of MoS2-based lubricants include two-stroke engines (such as motorcycle engines), bicycle coaster brakes, automotive CV and universal joints, ski waxes, and bullets. Other layered inorganic materials that exhibit lubricating properties (collectively known as solid lubricants (or dry lubricants)) include graphite, which requires volatile additives, and hexagonal boron nitride. If you are looking for high quality, high purity, and cost-effective Molybdenum disulfide, or if you require the latest price of Molybdenum disulfide, please feel free to email contact mis-asia.