Single Layer Molybdenum Disulfide quantum dots

• CAS: 7440-33-7
• Catalog Number: ACM7440337-26
• Category: Graphene-like Materials Series
• Molecular Weight: 183.8g/mol
• Molecular Formula: W
• Description: Dull gray powder or hard, brittle, steel-gray to white metal. Difficult to melt. Mp: 3410°C; bp; 5900°C. Density: 19.3 g/cm³. Used in alloys, light bulb filaments, and cutting tools. Tungsten Dust (for example, from grinding) may present a moderate fire hazard if allowed to accumulate and exposed to an ignition source.;DryPowder; DryPowder, OtherSolid; OtherSolid;GREY-TO-WHITE POWDER.;Physical properties vary depending upon the specific soluble tungsten compound.;Hard, brittle, steel-gray to tin-white solid.
• IUPAC Name: tungsten
• Canonical SMILES: [W]
• InChI: InChI=1S/W
• InChI Key: WFKWXMTUELFFGS-UHFFFAOYSA-N
• Boiling Point: 10701 °F at 760 mm Hg (NIOSH, 2016);5900 °C @ 760 mm Hg;5900 °C;10,701°F
• Melting Point: 6170 °F (NIOSH, 2016);3410 °C;3410 °C;6170°F
• Density: 19.3 (NIOSH, 2016);18.7-19.3 @ 20 °C/4 °C; depends on extent of working.;19.3 g/cm³;19.3
• Solubility: Insoluble (NIOSH, 2016);Sol in mixture of nitric acid and hydrofluoric acid;Solubility in water: none;Insoluble
• Application: The purpose of Single Layer Molybdenum Disulfide quantum dots is to leverage the unique properties of molybdenum disulfide (MoS2) in advanced electronic and optoelectronic applications. MoS2 is a naturally occurring compound known for its exceptional durability under heat and pressure, making it an excellent dry lubricant or additive to oils and greases. Its crystalline structure, featuring layers of sulfur and molybdenum atoms, facilitates easy separation between layers, enhancing its lubricating abilities. In single-layer form, MoS2 exhibits a direct band-gap, which is particularly advantageous for use in transistors, photodetectors, and other electronic devices, offering silicon-level charge mobility and a high current on/off ratio. These quantum dots are promising for the next generation of nanoelectronics and photonics, enabling the development of advanced heterostructured devices by combining with other transition metal dichalcogenide compounds.
• Autoignition Temperature: >=100 °C
• Color/Form: Steel-gray to tin-white metal; body centered cubic structure;CRYSTALLINE FORM GRAY-BLACK, CUBIC;Hard, brittle, steel-gray to tin-white solid.
• Complexity: 0
• Concentration: 0.5mg/ml
• Covalently-Bonded Unit Count: 1
• EC Number: 231-143-9
• Exact Mass: 183.950933g/mol
• Formal Charge: 0
• H-Bond Acceptor: 0
• H-Bond Donor: 0
• Heat of Vaporization: 1150 cal/g
• Heavy Atom Count: 1
• ICSC Number: 1404
• Monoisotopic Mass: 183.950933g/mol
• Other Experimental: Very pure tungsten can be cut with hacksaw and forged, spun, drawn, and extruded; impure metal brittle, worked with difficulty;NOT AFFECTED BY SULFUR OR PHOSPHORUS; GOOD ELECTRICAL CONDUCTIVITY;VIGOROUS REACTION WITH BROMINE TRIFLUORIDE, CHLORINE TRIFLUORIDE; REACTION WITH FLUORINE MAY BE INCANDESCENT;Corroded by sea water.;Atomic number: 74; valences 6, 5, 4, 3, 2. Naturally occurring isotopes: 180 (0.135%); 182 (26.4%); 183 (14.4%); 184 (30.6%); 186 (28.4%).;Hardness: 6.5-7.5. Specific heat (20 °C): 0.032 cal/g/deg C; heat of fusion: 44 cal/g; electrical resistivity (20 °C) 5.5 uohm-cm.;Forms trioxide at red heat; not attacked by water; oxidized to dioxide by steam; very stable to acids, attacked only superficially by concn nitric acid or aqua regia; attacked by fluorine at room temp; by chlorine at 250-300 °C giving hexachloride in absence of air and trioxide and oxychloride in presence of air.;Powdered tungsten can be pyropohric under the right conditions. Slowly sol in fused potassium hydroxide in air, in fused sodium carbonate in air, and sol in fused mixture of sodium hydroxide and nitrate.
• Rotatable Bond Count: 0
• RTECS Number: YO7175000
• Size: 10nm
• Stability: STABLE IN DRY AIR @ ORDINARY TEMP;OXIDIZES IN AIR & MUST BE PROTECTED @ ELEVATED TEMP
• UNII: V9306CXO6G
• UN Number: 3089;1325
• Vapor Pressure: 0 mm Hg (approx) (NIOSH, 2016);1.97X10-7 mm Hg @ 2,327 °C;0 mmHg (approx)

Custom Q&A

What is the molecular formula of tungsten?

The molecular formula of tungsten is W.

What is the molecular weight of tungsten?

The molecular weight of tungsten is 183.84 g/mol.

Is tungsten a naturally occurring element?

Yes, tungsten is a naturally occurring element.

What are some uses of tungsten?

Tungsten is used in products such as x-ray tubes, light bulbs, high-speed tools, welding electrodes, turbine blades, golf clubs, darts, fishing weights, gyroscope wheels, phonograph needles, bullets, and armor penetrators.

What is the density of tungsten?

The density of tungsten is 19.3 g/cm3.

Can tungsten present a fire hazard?

Tungsten dust, especially from grinding, may present a moderate fire hazard if allowed to accumulate and exposed to an ignition source.

What is the IUPAC name of tungsten?

The IUPAC name of tungsten is "tungsten."

What is the CAS number of tungsten?

The CAS number of tungsten is 7440-33-7.

What is the UN number of tungsten?

The UN number of tungsten is 3089.

Is tungsten listed on the Hazardous Substance List?

Yes, tungsten is listed on the Hazardous Substance List with the CAS number 1325.