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808822

Sigma-Aldrich

Tungsten diselenide

Crystal, 99.995%

Synonym(s):

Tungsten (IV) selenide, Tungsten selenide

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About This Item

Linear Formula:
WSe2
CAS Number:
12067-46-8
Molecular Weight:
341.76
MDL number:
MFCD00049703
UNSPSC Code:
26111700
PubChem Substance ID:
329769125
NACRES:
NA.23

Quality Level

100

description

Electrical properties: Semiconductor, p-type

Assay

99.995%

form

crystals

L × W × H

0.5 cm × 0.5 cm × 0.1-0.15 mm, typical size, some variation in dimensions may occur with different batches

primary crystallite size

~10 mm (hexagonal)

SMILES string

[Se]=[W]=[Se]

InChI

1S/2Se.W

InChI key

ROUIDRHELGULJS-UHFFFAOYSA-N

Application

The two dimensional layered inorganic nanomaterials have drawn significant attention recently owing to their thickness dependent physical and chemical properties. They find applications in photocatalysis, phtotovoltaics, gas sensing, lithium ion batteries, field effect transistors, spintronics etc. Transition metal dischalcogenides represent an important class of inorganic 2D materials having the aforementioned applications.

Preparation Note

Store under nitrogen atmosphere.

Signal Word

Danger

Hazard Statements

H301 + H331,H373,H410

Hazard Classifications

Acute Tox. 3 Inhalation - Acute Tox. 3 Oral - Aquatic Acute 1 - Aquatic Chronic 1 - STOT RE 2

Storage Class Code

6.1C - Combustible acute toxic Cat.3 / toxic compounds or compounds which causing chronic effects

WGK

WGK 3

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Regulatory Listings

Regulatory Listings are mainly provided for chemical products. Only limited information can be provided here for non-chemical products. No entry means none of the components are listed. It is the user’s obligation to ensure the safe and legal use of the product.

PDSCL

Poisonous substance

PRTR

Class I Designated Chemical Substances

ISHL Indicated Name

Substances Subject to be Indicated Names

ISHL Notified Names

Substances Subject to be Notified Names

JAN Code

808822-BULK:
808822-VAR:
808822-1EA-PW:
808822-1EA:

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Certificates of Analysis (COA)

Lot/Batch Number
MKCT7333
MKCT1735
MKCN8561
MKCL6353
MKBX7562V

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The Journal of Physical Chemistry C, 118, 3847-3863 (2014)
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Nature, 522(7556), 274-276 (2015-06-19)
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