ChemicalBook CAS DataBase List 12058-18-3

12058-18-3

Name	MOLYBDENUM SELENIDE
CAS	12058-18-3
EINECS(EC#)	235-027-9
Molecular Formula	MoSe2
MDL Number	MFCD00014216
Molecular Weight	253.86
MOL File	12058-18-3.mol

Synonyms

Nsc378344 MoSe2 Crystal Molydenum selenide Molybdaendiselenid MOLYBDENUM SELENIDE DISELENOXOMOLYBDENUM molybdenum diselenide MOLYBDENUM (IV) SELENIDE bis(selanylidene)molybdenum Molybdenum selenide (MoSe2) Molybdenum(IV) selenide(MoSe2) MOLYBDENUM(IV) SELENIDE: 99.9% Molybdenum(IV)selenide(99.9%-Mo) Molybdenum Diselenide (MoSe2) Powder Molybdenum Diselenide Monolayer Film Molybdenum Diselenide (MoSe2) Crystal (metals basis) Molybdenum(IV) selenide Molybdenum diselenide Crystal, 99.995% MOLYBDENUM SELENIDE ISO 9001：2015 REACH IV) 99.9% metel basisMolybdenum selenide Molybdenum(IV) selenide, 99.9% (metals basis) Molybdenum(IV) selenide, 99.9% trace metals basis Molybdenum(IV) selenide -325 mesh, 99.9% trace metals basis

Chemical Properties

Definition	Available as a 40-micron powder.
Melting point	>1200°C
density	6 g/cm³
form	Powder
color	Dark gray
Specific Gravity	6
Water Solubility	Insoluble in water.
Exposure limits	ACGIH: TWA 10 mg/m3; TWA 3 mg/m3; TWA 0.2 mg/m3 NIOSH: IDLH 5000 mg/m3; IDLH 1 mg/m3; TWA 0.2 mg/m3
Uses	Solid lubricant. less more
CAS DataBase Reference	12058-18-3
EPA Substance Registry System	Molybdenum selenide (MoSe2) (12058-18-3)
Bandgap	1.41 - 1.58 eV
Electronic properties	2D semiconductor

Safety Data

Hazard Codes	T,N
Risk Statements	23/25-33-50/53 less more
Safety Statements	20/21-28-45-60-61 less more
RIDADR	UN3283
WGK Germany	3
TSCA	Yes
HazardClass	6.1
PackingGroup	III

Hazard Information

Description

Molybdenum(IV) selenide, also known as molybdenum diselenide or 12058-18-3, is an inorganic compound with the chemical formula MoSe2. It belongs to a group of compounds called transition metal disulfides (TMDCs), which are formed by combining a transition metal with an element from group 16 on the periodic table. MoSe2 has higher electrical conductivity than MoS2.

Chemical Properties

gray powder(s); used as a solid lubricant and lubricant film prepared by sputtering 99.9% pure material [HAW93] [STR93] [CER91]

Physical properties

The monolayer film of molybdenum diselenide, with a direct optical band gap of 1.48 eV and a photoluminescence peak at 840 nm, is highly suitable for optoelectronic applications. Moreover, when compared to MoS2, MoSe2 ultrathin films demonstrate a narrower bandgap, higher optical absorbance, and larger spin-splitting energy. These characteristics make MoSe2 films potentially superior to MoS2 for the utilization in tunnel FETs and optoelectronic devices.

Preparation

Mo and Se were mixed at a molar ratio of 1:2, and molybdenum and selenium reacted at a temperature of 800 to 1150°C to form mainly molybdenum diselenide(MoSe2). High-quality monolayer films of molybdenum diselenide were successfully grown directly on SiO2/Si substrates using the chemical vapor deposition (CVD) method.

Synthesis

Chemical exfoliation, utilizing N-methyl pyrrolidone (NMP) as a solvent, allows for the large-scale production of nano-particles and nano-sheets. This method enables the direct preparation of molybdenum diselenide (MoSe2) quantum dots from bulk powder of molybdenum diselenide.?

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