CAS 12138-09-9: Tungsten disulfide

Tungsten(IV) sulfide (99.5%-W)

Tungsten(IV) sulfide (WS2) is a non-toxic, inorganic compound that belongs to the group of sulfur compounds. WS2 is a semiconductor with a bandgap of 2.3 eV and has been shown to have an irreversible inhibition on the sodium citrate enzyme. When irradiated with light, WS2 emits light at a wavelength of about 2200 nm. This property has been used for cancer treatment by laser ablation and chemical vapor deposition. The kinetics data obtained from the reaction solution and structural analysis have shown that WS2 is not very stable under acidic conditions but can be stabilized by oxidation catalysts such as molybdenum or tungsten oxide.

Tungsten sulfide is used as a component of catalysts for hydrotreating of crude oil, hydrodesulfurization and hydrodenitrification reactions. It finds application as solid-state secondary lithium battery cathodes and other electrochemical devices. It is found that it forms inorganic nanotubes, which is better reinforcing agents than carbon nanotubes. Tungsten sulfide addition to epoxy resin improves adhesion, fracture toughness and strain energy release rate. This Thermo Scientific Chemicals brand product was originally part of the Alfa Aesar product portfolio. Some documentation and label information may refer to the legacy brand. The original Alfa Aesar product / item code or SKU reference has not changed as a part of the brand transition to Thermo Scientific Chemicals.