209651

Selenium

powder, −100 mesh, ≥99.5% trace metals basis

• Empirical Formula (Hill Notation): Se
• CAS Number: 7782-49-2
• Molecular Weight: 78.96
• NACRES: NA.23
• PubChem Substance ID: 24852584
• UNSPSC Code: 12161600
• EC Number: 231-957-4
• MDL number: MFCD00134090

Properties

• description: gray
• Quality Segment: 100
• assay: ≥99.5% trace metals basis
• form: powder
• reaction suitability: reagent type: catalyst; core: selenium
• resistivity: 1.2 μΩ-cm, 0°C
• particle size: −100 mesh
• bp: 684.9 °C (lit.)
• mp: 217 °C (lit.)
• density: 4.81 g/mL at 25 °C (lit.)
• SMILES string: [Se]
• InChI: 1S/Se
• InChI key: BUGBHKTXTAQXES-UHFFFAOYSA-N

Description

General description

Selenium powder is a fine, powdery substance made up of small particles of the element selenium, often produced by the reduction of selenium oxide. Selenium powder is grey or silvered-colored and may have a metallic sheen that may appear reddish in color. This product is passed through a 100-mesh sieve, indicating that the particles are small and have a diameter of around 150 micrometers or less, and ensuring the powder is fine and easy-to-handle.

Application

Se is used in the synthesis of CdSe, which is consequetively used to modulate the photoresponse of quantum dot solar cells by varying the size and shape of semiconductor nanostructures.

Safety Information

• pictograms: GHS06,GHS08
• signalword: Danger
• hcodes: H301 + H331,H373,H413
• pcodes: P260 - P264 - P273 - P301 + P310 - P304 + P340 + P311 - P314
• Hazard Classifications: Acute Tox. 3 Inhalation - Acute Tox. 3 Oral - Aquatic Chronic 4 - STOT RE 2
• Storage Class: 6.1C - Combustible acute toxic Cat.3 / toxic compounds or compounds which causing chronic effects
• wgk: WGK 2
• flash_point_f: Not applicable
• flash_point_c: Not applicable
• ppe: Eyeshields, Faceshields, Gloves, type P2 (EN 143) respirator cartridges