12138-09-9
| Name | TUNGSTEN SULFIDE |
| CAS | 12138-09-9 |
| EINECS(EC#) | 235-243-3 |
| Molecular Formula | S2W |
| MDL Number | MFCD00011467 |
| Molecular Weight | 247.97 |
| MOL File | 12138-09-9.mol |
Chemical Properties
| Appearance | Grayish-black solid. Mp above 1480C, can lubricate at temperatures above 2400F (1316C). Attacked by fluorine and hot sulfuric and hydrogen fluoride. |
| Melting point | 1480 °C |
| density | 7.5 g/mL at 25 °C(lit.) |
| RTECS | YO7716000 |
| solubility | insoluble in H2O, HCl, alkaline solutions |
| form | powder |
| color | Dark gray |
| Specific Gravity | 7.5 |
| Water Solubility | Slightly soluble in water. |
| Exposure limits | ACGIH: TWA 3 mg/m3 NIOSH: TWA 5 mg/m3; STEL 10 mg/m3 |
| CAS DataBase Reference | 12138-09-9(CAS DataBase Reference) |
| EPA Substance Registry System | Tungsten sulfide (WS2) (12138-09-9) |
| Application | Due to its distinctive electron configuration and high specific surface area, few-layer tungsten disulfide nanosheets have potential applications in electrodes and energy storage devices, supercapacitors, and photoelectrochemical cells as a catalyst for hydrogen evolution reactions (HERs). With?tunable electromagnetic absorption, it has practical applications?against electromagnetic pollution. WS2?is also a great potential candidate in photothermal therapy for the ablation of cancer cells, when NIR light is absorbed and converted into heat. |
| Bandgap | 1.4 - 2.01 eV |
| Chemical Synthesis | High-quality tungsten disulfide monolayer?films?are grown directly on the substrates (sapphire) by? the chemical vapour deposition (CVD) method. |
| Electronic properties | 2D semiconductor |
| Odor | Transparent |
| Preparation | Synthetic?- Chemical Vapour Transport (CVT) |
Safety Data
| Hazard Codes | Xi |
| Risk Statements | |
| Safety Statements | |
| WGK Germany | - |
| TSCA | Yes |
| HS Code | 28291900 |