ChemicalBook
Chinese Japanese Germany Korea

TUNGSTEN SULFIDE

Description Uses References
TUNGSTEN SULFIDE
TUNGSTEN SULFIDE structure
CAS No.
12138-09-9
Chemical Name:
TUNGSTEN SULFIDE
Synonyms
Wolframdisulfid;Tungsten sulfid;TUNGSTEN SULFIDE;TUNGSTEN DISULFIDE;Tungsten bisulfide;tungsten disulphide;tungsten disuIlfide;tungstensulfide(ws2);TUNGSTEN(IV) SULFIDE;Wolfram(IV)disulfide
CBNumber:
CB9239043
Molecular Formula:
S2W
Formula Weight:
247.97
MOL File:
12138-09-9.mol

TUNGSTEN SULFIDE Properties

Melting point:
1480 °C
Density 
7.5 g/mL at 25 °C(lit.)
RTECS 
YO7716000
form 
powder
color 
Dark gray
Specific Gravity
7.5
Water Solubility 
Slightly soluble in water.
CAS DataBase Reference
12138-09-9(CAS DataBase Reference)
SAFETY
  • Risk and Safety Statements
  • Hazard and Precautionary Statements (GHS)
Hazard Codes  Xi
Risk Statements  36/37/38
Safety Statements  26-37/39
WGK Germany  -
TSCA  Yes
HS Code  28291900
Symbol(GHS):
Signal word: Warning
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.
P305+P351+P338 IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing.

TUNGSTEN SULFIDE price More Price(7)

Manufacturer Product number Product description CAS number Packaging Price Updated Buy
Sigma-Aldrich 243639 Tungsten(IV) sulfide powder, 2 μm, 99% 12138-09-9 50g $69 2018-11-13 Buy
Sigma-Aldrich 790583 Tungsten(IV) sulfide nanopowder, 90 nm avg. part. size (SEM), 99% trace metals basis 12138-09-9 5g $73.5 2018-11-13 Buy
Alfa Aesar 011829 Tungsten sulfide 99.8% (metals basis) 12138-09-9 50g $74.6 2018-11-20 Buy
Alfa Aesar 011829 Tungsten sulfide 99.8% (metals basis) 12138-09-9 250g $240 2018-11-20 Buy
Strem Chemicals 93-7424 Tungsten(IV) sulfide (99.5%-W) 12138-09-9 250g $247 2018-11-13 Buy

TUNGSTEN SULFIDE Chemical Properties,Uses,Production

Description

Tungsten sulfide (S2W) is a chemical compound that exists naturally in the form of a rare mineral called tungstenite. It is used as a principal component of catalysts in processes such as hydrogenation of crude oil, hydrodesulfurization and hydrodenitrification reactions. It is widely employed as additives in solid lubricants to improve lubricants and extreme pressure properties and antiwear properties especially in environments of high temperature, high pressure, high vacuum, high load and with radiation and corrosive media. Due to the above property, the nanoscale of tungsten sulfide can be also added in the casting process which helps make cast metal have a certain self-lubricating properties and have an excellent adsorption capacity on the metal surface. It can also be used as solid-state secondary lithium battery cathodes and other electrochemical devices. Besides, it is found that the friction coefficient of tungsten sulfide is relatively small, which makes it an additive in other metal powder for a stable friction coefficient. It also finds application in semiconductor materials, inorganic nanotubes, etc.

Uses

Tungsten disulfide (WS2) in bulk has been used for many years as a dry lubricant due to how it exhibits properties of a low coefficient of friction, high chemical stability, and thermal stability. In 1992, it was discovered that the structure of WS2 made it capable of forming nanotube structures. These nanotubes were the first examples of WS2 being used as a low-dimensional material.
After the discovery of simple mechanical exfoliation techniques to isolate single layers of 2-D materials, it was possible to study the properties of WS2 flakes. It was shown that, just like MoS2, the band-gap of WS2 change from an indirect band-gap of 1.4eV to a direct band-gap of 2eV when changing from a bulk material to a 2-D material. Due to its band-gap, WS2 is seen as a significantly interesting material for many areas of application.
WS2 possesses a high on/off ratio in field-effect transistors, controllable spin and valley polarisation, strong geometrical confinement of excitons, and tunable photoluminescence. Additionally, WS2 could lead to increased interest in areas such as photodetectors and multi-junction photovoltaics.
Besides, WS2 is used, in conjunction with other materials, as catalyst for hydrotreating of crude oil.
Lamellar tungsten disulfide is used as a dry lubricant for fasteners, bearings, and molds under the brand name Dicronite.

References

https://en.wikipedia.org/wiki/Tungsten_disulfide
https://www.alfa.com/zh-cn/catalog/011829/
http://www.us-nano.com/inc/sdetail/1030
http://www.azonano.com/article.aspx?ArticleID=3360

Chemical Properties

Grayish-black solid. Mp above 1480C, can lubricate at temperatures above 2400F (1316C). Attacked by fluorine and hot sulfuric and hydrogen fluoride.

TUNGSTEN SULFIDE Preparation Products And Raw materials

Raw materials

Preparation Products


TUNGSTEN SULFIDE Suppliers

Global( 89)Suppliers
Supplier Tel Fax Email Country ProdList Advantage
Henan DaKen Chemical CO.,LTD.
+86-371-55531817
info@dakenchem.com CHINA 21930 58
Henan Tianfu Chemical Co.,Ltd.
0371-55170693
0371-55170693 info@tianfuchem.com CHINA 20680 55
Mainchem Co., Ltd.
+86-0592-6210733
+86-0592-6210733 sales@mainchem.com CHINA 32457 55
career henan chemical co
+86-371-86658258
sales@coreychem.com CHINA 20516 58
Chemwill Asia Co.,Ltd.
86-21-51086038
86-21-51861608 chemwill_asia@126.com;sales@chemwill.com;chemwill@hotmail.com;chemwill@gmail.com CHINA 23982 58
Hubei Jusheng Technology Co.,Ltd.
86-188-71490254
peter@hubeijusheng.com CHINA 20094 58
Nanjing XFNano Material Tech Co., Ltd 025-68256996 13260851877
025-68256991 sale@xfnano.com China 278 60
J & K SCIENTIFIC LTD. 400-666-7788 +86-10-82848833
+86-10-82849933 jkinfo@jkchemical.com;market6@jkchemical.com China 96815 76
Alfa Aesar 400-610-6006; 021-67582000
021-67582001/03/05 saleschina@alfa-asia.com China 30168 84
BeiJing Hwrk Chemicals Limted 4006990298;010-57411839;0757-86311057;021-51691807
010-87653215;0757-86311057;021-55236763 sales@hwrkchemical.com China 14611 55

View Lastest Price from TUNGSTEN SULFIDE manufacturers

Image Release date Product Price Min. Order Purity Supply Ability Manufacturer
2018-12-19 TUNGSTEN SULFIDE
12138-09-9
US $1.00 / kg 1kg 99% Customized career henan chemical co

12138-09-9(TUNGSTEN SULFIDE)Related Search:


Copyright 2017 © ChemicalBook. All rights reserved