20th anniversary seal20th anniversary seal20th anniversary seal

Molybdenum Tungsten Diselenide


CAS #:

Linear Formula:



Molybdenum Tungsten Diselenide Powder
Typical purity exceeds 99.995%
Pricing > SDS > Data Sheet >
≥99.995% Molybdenum Tungsten Diselenide Crystal (Semiconductor-grade)
Pricing > SDS > Data Sheet >

Molybdenum Tungsten Diselenide Properties (Theoretical)

Compound Formula MoWSe2
Molecular Weight Varies by composition
Appearance Black metallic crystals or powder
Melting Point N/A
Boiling Point N/A
Density N/A
Size Range ~6-8 mm
Solubility in H2O N/A
Crystal Phase / Structure Hexagonal

Molybdenum Tungsten Diselenide Health & Safety Information

Signal Word Danger
Hazard Statements H301+H331-H373-H410
Hazard Codes T, N
Precautionary Statements P260-P301+P310-P304+P340-P405-P501
Transport Information UN 3283 6.1/PG III
GHS Pictograms

About Molybdenum Tungsten Diselenide

American Elements manufactures ultra high purity, semiconductor grade Molybdenum Tungsten Diselenide (MoWSe2) single crystals in various ratios of Mo/W in the composition of MoxW(1-x)Se2 where x=0.1 - 0.9. American Elements MoWSe2 are defect-free and easily exfoliated into 2D monolayers. Typical and custom packaging is available. Additional technical, research and safety (MSDS) information is available. Please request a quote above to receive pricing information based on your specifications.

Molybdenum Tungsten Diselenide Synonyms

MoWSe2, Molybdenum Tungsten diselenide alloy, MoxW(1-x)Se2, Mo0.5W0.05Se2, MoWSe, (Mo/W)Se2, Mo-W-Se

Chemical Identifiers

Linear Formula MoWSe2
MDL Number N/A
EC No. N/A

Packaging Specifications

Typical bulk packaging includes palletized plastic 5 gallon/25 kg. pails, fiber and steel drums to 1 ton super sacks in full container (FCL) or truck load (T/L) quantities. Research and sample quantities and hygroscopic, oxidizing or other air sensitive materials may be packaged under argon or vacuum. Shipping documentation includes a Certificate of Analysis and Safety Data Sheet (SDS). Solutions are packaged in polypropylene, plastic or glass jars up to palletized 440 gallon liquid totes, and 36,000 lb. tanker trucks.

Related Elements

See more Molybdenum products. Molybdenum (atomic symbol: Mo, atomic number: 42) is a Block D, Group 6, Period 5 element with an atomic weight of 95.96. Molybdenum Bohr ModelThe number of electrons in each of molybdenum's shells is [2, 8, 18, 13, 1] and its electron configuration is [Kr] 4d5 5s1. The molybdenum atom has a radius of 139 pm and a Van der Waals radius of 209 pm. In its elemental form, molybdenum has a gray metallic appearance. Molybdenum was discovered by Carl Wilhelm in 1778 and first isolated by Peter Jacob Hjelm in 1781. Molybdenum is the 54th most abundant element in the earth's crust. Elemental MolybdenumIt has the third highest melting point of any element, exceeded only by tungsten and tantalum. Molybdenum does not occur naturally as a free metal, it is found in various oxidation states in minerals. The primary commercial source of molybdenum is molybdenite, although it is also recovered as a byproduct of copper and tungsten mining. The origin of the name Molybdenum comes from the Greek word molubdos meaning lead.

Selenium Bohr ModelSee more Selenium products. Selenium (atomic symbol: Se, atomic number: 34) is a Block P, Group 16, Period 4 element with an atomic radius of 78.96. The number of electrons in each of Selenium's shells is 2, 8, 18, 6 and its electron configuration is [Ar] 3d10 4s2 4p4. The selenium atom has a radius of 120 pm and a Van der Waals radius of 190 pm. Selenium is a non-metal with several allotropes: a black, vitreous form with an irregular crystal structure three red-colored forms with monoclinic crystal structures and a gray form with a hexagonal crystal structure, the most stable and dense form of the element. Elemental SeleniumOne of the mose common uses for selenium is in glass production the red tint that it lends to glass neutralizes green or yellow tints from impurities in the glass materials. Selenium was discovered and first isolated by Jöns Jakob Berzelius and Johann Gottlieb Gahn in 1817. The origin of the name Selenium comes from the Greek word "Selênê," meaning moon.

See more Tungsten products. Tungsten (atomic symbol: W, atomic number: 74) is a Block D, Group 6, Period 6 element with an atomic weight of 183.84. The number of electrons in each of tungsten's shells is [2, 8, 18, 32, 12, 2] and its electron configuration is [Xe] 4f14 5d4 6s2. Tungsten Bohr ModelThe tungsten atom has a radius of 139 pm and a Van der Waals radius of 210 pm. Tungsten was discovered by Torbern Bergman in 1781 and first isolated by Juan José Elhuyar and Fausto Elhuyar in 1783. In its elemental form, tungsten has a grayish white, lustrous appearance. Elemental TungstenTungsten has the highest melting point of all the metallic elements and a density comparable to that or uranium or gold and about 1.7 times that of lead. Tungsten alloys are often used to make filaments and targets of x-ray tubes. It is found in the minerals scheelite (CaWO4) and wolframite [(Fe,Mn)WO4]. In reference to its density, Tungsten gets its name from the Swedish words tung and sten, meaning heavy stone.


June 24, 2019
Los Angeles, CA
Each business day American Elements' scientists & engineers post their choice for the most exciting materials science news of the day

Scientists discover why cesium and rubidium enhance perovskite solar cells