Tungsten sulfide - ≥99.9% metals basis, 25μm , CAS No.12138-09-9

CAS: 12138-09-9 Cat. No.: T137743 Formula: WS2 Molecular Weight: 247.97 EC Number: 682-620-7 PubChem CID: 82938
AVAILABLE TO ORDER
GRADE & PURITY ≥99.9% metals basis 25μm
Synonyms
Tungsten Disulfide (WS2) Ultrafinepowder | [WS2] | Few Layers WS2 Nano Powder | (WS2) | Few Layers Nano WS2 suspension 0.1mg/mL(C: 0.1mg/ml, solvent: water) | EINECS 235-243-3 | Few Layers Nano WS2 suspension 0.1mg/mL(C: 0.1mg/ml, solvent: IPA) | WS2 powd
Storage
Room temperature,Argon charged,Desiccated
Shipped In
Normal
★
Size
Germany (EU)
USA*
Price
Qty
5g
T137743-5g
—
7 In stock
€12.06
25g
T137743-25g
—
7 In stock
€25.95
100g
T137743-100g
—
3 In stock
€74.54
500g
T137743-500g
2 In stock
1 In stock
€260.23
Enter a quantity for the sizes you want to add.
🧪
Why this grade

≥99.9% metals basis, 25μm for sensitive chromatographic and analytical workflows requiring minimal baseline interference.

🌡

Storage & shipping

Room temperature,Argon charged,Desiccated Ships Normal Check lot-specific COA for exact specifications.

📋

Quality documents

SDS, COA, datasheet, and spec sheet available for download. Lot-specific COA accessible via lot number lookup.

📚

Literature proof

Cited in 126 peer-reviewed publications across chromatography, organic synthesis, and cross-coupling reactions.

Overview

Tungsten(IV) sulfide is an inorganic chemical compound that occurs naturally as the rare mineral tungstenite. It is most commonly used as hydrogen and lithium storage material, as material for lithium battery cathodes, as a component of batteries and other electrochemical devices, as a dry lubricant, and as a catalyst in hydrodesulfurization of crude oil. Due to its layered structure, tungsten(IV) disulfide forms inorganic nanotubules, which are being investigated for potential applications such as epoxy reinforcement, uses in impact-absorbing materials, and as a means to preserve or guide nanometer-scale amounts of material.
A component of catalysts and batteries

Specifications

Synonyms
Tungsten Disulfide (WS2) Ultrafinepowder | [WS2] | Few Layers WS2 Nano Powder | (WS2) | Few Layers Nano WS2 suspension 0.1mg/mL(C: 0.1mg/ml, solvent: water) | EINECS 235-243-3 | Few Layers Nano WS2 suspension 0.1mg/mL(C: 0.1mg/ml, solvent: IPA) | WS2 powd
Specifications & Purity
≥99.9% metals basis, 25μm
Storage
Room temperature,Argon charged,Desiccated
Shipped In
Normal
Purity
≥99.9% metals basis
Names and Identifiers
Pubchem Sid
Pubchem Sid Url
https://pubchem.ncbi.nlm.nih.gov/substance/508815299
Canonical Smiles
S=[W]=S
IUPAC Name
bis(sulfanylidene)tungsten
InChIKey
ITRNXVSDJBHYNJ-UHFFFAOYSA-N
INCHI
1S/2S.W
Isomeric SMILES
S=[W]=S
PubChem CID
82938
Molecular Weight
247.97

Documentation

📋 Safety Data Sheet (SDS)

Comprehensive hazard, handling, storage, and regulatory compliance document.

<<<<<<< HEAD Download SDS → ======= Download SDS → >>>>>>> release248-p3

✅ Certificate of Analysis (COA)

Lot-specific quality data. Enter your lot number to retrieve the exact COA.

Look up COA →

📊 Datasheet

Quick-reference summary of product specifications and applications.

View datasheet →

🔬 Specification Sheet

Full quality attributes and acceptance criteria for this grade.

View spec sheet →

Advanced Data

Taxonomic Classification

Taxonomy Tree

KingdomInorganic compounds
SuperclassMixed metal/non-metal compounds
ClassTransition metal organides
SubclassTransition metal sulfides
Intermediate Tree Nodes Not available
Direct ParentTransition metal sulfides
Alternative Parents Inorganic sulfides  Inorganic salts  
Molecular FrameworkNot available
Substituents Transition metal sulfide - Inorganic sulfide - Inorganic salt
DescriptionThis compound belongs to the class of inorganic compounds known as transition metal sulfides. These are inorganic compounds containing a sulfur atom of an oxidation state of -2, in which the heaviest atom bonded to the oxygen is a transition metal.
External Descriptors sulfide salt
3D Structure
Interactive Chemical Structure Model





Certificates (CoA,COO,BSE/TSE and Analysis Chart)
C of A & Other Certificates(BSE/TSE, COO):
Analytical Chart:

Find and download the COA for your product by matching the lot number on the packaging.

23 results found

Lot NumberCertificate TypeDateItem
I2615712I2615712Certificate of AnalysisAug 26, 2026 T137743
I2615711I2615711Certificate of AnalysisAug 26, 2026 T137743
I2615710I2615710Certificate of AnalysisAug 26, 2026 T137743
I2615709I2615709Certificate of AnalysisAug 26, 2026 T137743
D2224077D2224077Certificate of AnalysisFeb 04, 2026 T137743
D2224078D2224078Certificate of AnalysisFeb 04, 2026 T137743
L2103139L2103139Certificate of AnalysisSep 09, 2025 T137743
L2103138L2103138Certificate of AnalysisSep 09, 2025 T137743
D2616558D2616558Certificate of AnalysisJul 28, 2025 T137743
H2522509H2522509Certificate of AnalysisJul 28, 2025 T137743
H2515609H2515609Certificate of AnalysisJul 28, 2025 T137743
H2515608H2515608Certificate of AnalysisJul 28, 2025 T137743
H2515607H2515607Certificate of AnalysisJul 28, 2025 T137743
F2603062F2603062Certificate of AnalysisJul 28, 2025 T137743
C2125318C2125318Certificate of AnalysisJan 15, 2025 T137743
C2125320C2125320Certificate of AnalysisJan 15, 2025 T137743
D2515032D2515032Certificate of AnalysisFeb 23, 2023 T137743
C23241089C23241089Certificate of AnalysisFeb 23, 2023 T137743
C23241075C23241075Certificate of AnalysisFeb 23, 2023 T137743
C23241074C23241074Certificate of AnalysisFeb 23, 2023 T137743
C23241067C23241067Certificate of AnalysisFeb 23, 2023 T137743
D2224076D2224076Certificate of AnalysisDec 28, 2021 T137743
D2224073D2224073Certificate of AnalysisDec 28, 2021 T137743
Chemical and Physical Properties
SolubilitySlightly soluble in water.
Melt Point(°C)1250°C
Molecular Weight248.000 g/mol
XLogP3
Hydrogen Bond Donor Count0
Hydrogen Bond Acceptor Count2
Rotatable Bond Count0
Exact Mass247.895 Da
Monoisotopic Mass247.895 Da
Topological Polar Surface Area64.200 Ų
Heavy Atom Count3
Formal Charge0
Complexity18.300
Isotope Atom Count0
Defined Atom Stereocenter Count0
Undefined Atom Stereocenter Count0
Defined Bond Stereocenter Count0
Undefined Bond Stereocenter Count0
The total count of all stereochemical bonds0
Covalently-Bonded Unit Count1
Documents & Articles
Citations of This Product
Solution Calculators
Reviews

Customer Reviews

Frequently Asked Questions

How should this product be stored?
Store at room temperature, desiccated, under argon. It is supplied under an argon blanket; reseal under inert gas after each use.
What are the CAS number, molecular formula and molecular weight?
The CAS Number is 12138-09-9, the molecular formula is WS2, and the molecular weight is 247.97 g/mol. InChIKey ITRNXVSDJBHYNJ-UHFFFAOYSA-N.
What documentation is provided?
Available product documentation, including Certificates of Analysis (COA), Safety Data Sheets (SDS), and specification sheets, is shown in the product document area. Document availability and access follow the current site policy.

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