CAS 7782-49-2
:Selenium
Description:
Selenium is a non-metallic element with the atomic number 34 and is classified as a chalcogen in group 16 of the periodic table. It exhibits several allotropes, the most stable of which is a gray, metallic-looking form. Selenium is known for its semiconductor properties, making it valuable in electronic applications, particularly in photocells and solar cells. It is also utilized in glassmaking to decolorize glass and in the production of pigments. Selenium is essential in trace amounts for certain organisms, including humans, where it plays a critical role in antioxidant enzyme functions. However, it can be toxic in higher concentrations, leading to selenosis, which is characterized by symptoms such as gastrointestinal distress and neurological issues. Selenium compounds can exhibit various oxidation states, typically ranging from -2 to +6, influencing their reactivity and applications. Its CAS number, 7782-49-2, is a unique identifier used to specify this element in chemical databases and regulatory documents. Overall, selenium is a versatile element with both beneficial and hazardous properties, depending on its form and concentration.
Formula:Se
InChI:InChI=1S/Se
InChI key:InChIKey=BUGBHKTXTAQXES-UHFFFAOYSA-N
SMILES:[Se]
Synonyms:- B-TRAXIM Se
- Selen
- Selenio
- Selenium (Se)
- Selsaf 2000
- Serendipita MKCA6-3
- selenide
- Selenium
- VANDEX
- C.I. 77805
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Selenium (Powder)
CAS:Formula:SePurity:>99.9%Color and Shape:White to Gray powder to crystalMolecular weight:78.96Selenium powder, -200 mesh, 99.999% (metals basis)
CAS:<p>This Thermo Scientific Chemicals brand product was originally part of the Alfa Aesar product portfolio. Some documentation and label information may refer to the legacy brand. The original Alfa Aesar product / item code or SKU reference has not changed as a part of the brand transition to Thermo Sci</p>Formula:SePurity:99.999%Color and Shape:Powder, Pale grey to dark greyMolecular weight:78.97Selenium, powder, 99+%
CAS:<p>This Thermo Scientific Chemicals brand product was originally part of the Alfa Aesar product portfolio. Some documentation and label information may refer to the legacy brand. The original Alfa Aesar product / item code or SKU reference has not changed as a part of the brand transition to Thermo Sci</p>Formula:SePurity:99+%Color and Shape:Dark grey to black, PowderMolecular weight:78.97Selenium ingot/button,≈38mm (1.5 in.) dia.
CAS:<p>This Thermo Scientific Chemicals brand product was originally part of the Alfa Aesar product portfolio. Some documentation and label information may refer to the legacy brand. The original Alfa Aesar product / item code or SKU reference has not changed as a part of the brand transition to Thermo Sci</p>Selenium shot, amorphous, 1-6mm (0.04-0.24in), Puratronic, 99.999+% (metals basis)
CAS:<p>This Thermo Scientific Chemicals brand product was originally part of the Alfa Aesar product portfolio. Some documentation and label information may refer to the legacy brand. The original Alfa Aesar product / item code or SKU reference has not changed as a part of the brand transition to Thermo Sci</p>Formula:SePurity:99.999+%Molecular weight:78.97Selenium shot, amorphous, 2-6mm (0.08-0.2in), Puratronic™, 99.999% (metals basis)
CAS:<p>This Thermo Scientific Chemicals brand product was originally part of the Alfa Aesar product portfolio. Some documentation and label information may refer to the legacy brand. The original Alfa Aesar product / item code or SKU reference has not changed as a part of the brand transition to Thermo Sci</p>Formula:SePurity:99.999%Molecular weight:78.97Selenium powder, -325 mesh, 99.5% (metals basis)
CAS:<p>This Thermo Scientific Chemicals brand product was originally part of the Alfa Aesar product portfolio. Some documentation and label information may refer to the legacy brand. The original Alfa Aesar product / item code or SKU reference has not changed as a part of the brand transition to Thermo Sci</p>Formula:SePurity:99.5%Color and Shape:Grey to dark grey to black, PowderMolecular weight:78.97Selenium powder (99.5%)
CAS:<p>Selenium powder (99.5%)</p>Formula:SePurity:(99.5%)Color and Shape:-200 meshMolecular weight:78.96Selenium powder (99.99%)
CAS:<p>Selenium powder (99.99%)</p>Formula:SePurity:(99.99%)Color and Shape:-200 meshMolecular weight:78.96Selenium shot (99.99%)
CAS:<p>Selenium shot (99.99%)</p>Formula:SePurity:(99.99%)Color and Shape:gray pellets (~2mm dia.)Molecular weight:78.96Selenium, amorphous shot 1-3mm
CAS:<p>Selenium, amorphous shot 1-3mm</p>Purity:99.999%Molecular weight:78.95999g/molSelenium, powder
CAS:Formula:SePurity:≥ 99.5%Color and Shape:Dark grey to black powderMolecular weight:78.96Selenium Granules 2-4 mm, 99.999%
CAS:Formula:SePurity:≥ 99.999%Color and Shape:Grey coloured granulesMolecular weight:78.96Selenium Powder -200 mesh, 99.8%
CAS:Formula:SePurity:≥ 99.8%Color and Shape:Dark grey to black powderMolecular weight:78.96Selenium, amorphous powder
CAS:<p>Selenium, amorphous powder</p>Formula:SePurity:99.5%Molecular weight:78.95999g/molSelenium Metal Granular ultrapure, 99.999%, 1-6mm
CAS:Purity:min. 99.999%Color and Shape:Grey, Powder
