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Molybdenum disulfide

Description
Molybdenum disulfide
Molybdenum disulfide structure
CAS No.
1317-33-5
Chemical Name:
Molybdenum disulfide
Synonyms
mos2;dag325;mopolm;mopols;molykote;MOLYBDENITE;Molybdndisulfid;Molybdic sulfide;MOLYBDENUMSULPHIDE;naturalmolybdenite
CBNumber:
CB6238843
Molecular Formula:
MoS2
Formula Weight:
160.07
MOL File:
1317-33-5.mol

Molybdenum disulfide Properties

Melting point:
2375 °C
Density 
5.06 g/mL at 25 °C(lit.)
form 
powder
color 
Gray to dark gray or black
Specific Gravity
4.8
Water Solubility 
Soluble in hot sulfuric acid, and aquaregia. Insoluble in water, concentrated sulfuric acid and dilute acid.
Merck 
14,6236
Boiling point:
100°C (water)
Stability:
Stable. Incompatible with oxidizing agents, acids.
CAS DataBase Reference
1317-33-5(CAS DataBase Reference)
SAFETY
  • Risk and Safety Statements
  • Hazard and Precautionary Statements (GHS)
Safety Statements  22-24/25
WGK Germany  -
RTECS  QA4697000
TSCA  Yes
HS Code  28309090
Symbol(GHS):
Signal word:
Hazard statements:
Code Hazard statements Hazard class Category Signal word Pictogram P-Codes
H315 Causes skin irritation Skin corrosion/irritation Category 2 Warning P264, P280, P302+P352, P321,P332+P313, P362
H319 Causes serious eye irritation Serious eye damage/eye irritation Category 2A Warning P264, P280, P305+P351+P338,P337+P313P
H335 May cause respiratory irritation Specific target organ toxicity, single exposure;Respiratory tract irritation Category 3 Warning
Precautionary statements:
P261 Avoid breathing dust/fume/gas/mist/vapours/spray.
P304+P340 IF INHALED: Remove victim to fresh air and Keep at rest in a position comfortable for breathing.
P305+P351+P338 IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing.
P405 Store locked up.

Molybdenum disulfide price More Price(15)

Manufacturer Product number Product description CAS number Packaging Price Updated Buy
Sigma-Aldrich 234842 Molybdenum(IV) sulfide powder, <2 μm, 99% 1317-33-5 100g $59.7 2018-11-13 Buy
Sigma-Aldrich 234842 Molybdenum(IV) sulfide powder, <2 μm, 99% 1317-33-5 500g $204 2018-11-13 Buy
Alfa Aesar 012213 Molybdenum(IV) sulfide, 98% 1317-33-5 250g $81.9 2018-11-16 Buy
Alfa Aesar 012213 Molybdenum(IV) sulfide, 98% 1317-33-5 1kg $247 2018-11-16 Buy
Strem Chemicals 93-4247 Molybdenum(IV) sulfide, 97+% 1317-33-5 100g $53 2018-11-13 Buy

Molybdenum disulfide Chemical Properties,Uses,Production

Description

Molybdenum disulfide (MoS2) is the most famous of the single layer transition metal dichalcogenide (TMD) family. MoS2 has been used in bulk for many years as a solid state lubricant, this is due to its low coefficient of friction in addition to its high chemical and thermal stability. All forms of MoS2 have a layered structure, in which a plane of molybdenum atoms is sandwiched by planes of sulfide ions. These three strata form a monolayer of MoS2. Bulk MoS2 consists of stacked monolayers, which are held together by weak van der Waals interactions. Similar to graphite, when MoS2 transitions from a bulk structure to a single layer structure the properties of this material undergo a significant change.
The most striking change that occurs when transitioning from bulk to single layer is the shift in the optoelectronic properties, with the material changing from being an indirect bandgap semiconductor with a bandgap value of approximately 1.3 eV to a direct bandgap semiconductor with a bandgap value of approximately 1.9 eV. Due to the presence of a bandgap in this material there are significantly more uses for MoS2 in comparison to other 2d materials such as graphene.
In recent years, MoS2 has been utilized in flexible electronic applications, promoting more investigation into the elastic properties of this material. Nanoscopic bending tests using AFM cantilever tips were performed on micromechanically exfoliated MoS2 flakes that were deposited on a holey substrate. The yield strength of monolayer flakes was 270 GPa, while the thicker flakes were also stiffer, with a yield strength of 330 GPa. Molecular dynamic simulations found the in-plane yield strength of MoS2 to be 229 GPa, which matches the experimental results within error. Some areas in which MoS2 has already been applied include high on/off ratio field effect transistors due to low leakage currents, memresistors based on layered TMD films, controllable spin and valley polarization, geometric confinement of excitons, tuneable photoluminescence, the electrolysis of water, and photovoltaics/photodetectors.

Chemical Properties

dark grey or black powder

Uses

Dry lubricant and lubricant additive. Hydrogenation catalyst.

Uses

Molybdenum disulfide (MoS2) is one of the most widely used lubricants in space systems.it is a common additive that improves the antiseize properties of wheel bearing grease.Molybdenum disulfide (MoS2) has been used for many years as a solid lubricant because of its interesting friction-reducing properties related to its crystalline structure. MoS2 is a lamellar compound made of a stacking of S-Mo-S layers . In each of them, the molybdenum atom is surrounded by six sulfur atoms located at the top of a trigonal prism. The distance between a molybdenum atom and a sulfur atom is equal to 0.241 nm, whereas the distance between two sulfur atoms from two adjacent layers is equal to 0.349 nm. This characteristic was often used to explain easy cleavage between the layers and therefore the lubricating properties of MoS2.

Definition

Natural molybdenum sul-fide found in igneous rocks and metallic veins.

Hazard

Toxic material.

Molybdenum disulfide Preparation Products And Raw materials

Raw materials

Preparation Products


Molybdenum disulfide Suppliers

Global( 171)Suppliers
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Molybdenum disulfide Spectrum


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