CAS 7782-49-2
:Selenio
Descrizione:
Selenio è un elemento non metallico con il numero atomico 34 ed è classificato come un calcogeno nel gruppo 16 della tavola periodica. Presenta diversi alotropi, il più stabile dei quali è una forma grigia dall'aspetto metallico. Selenio è noto per le sue proprietà semiconduttrici, rendendolo prezioso in applicazioni elettroniche, in particolare in fotocellule e celle solari. È anche utilizzato nella produzione di vetro per decolorare il vetro e nella produzione di pigmenti. Selenio è essenziale in quantità traccia per alcuni organismi, compresi gli esseri umani, dove svolge un ruolo critico nelle funzioni delle enzimi antiossidanti. Tuttavia, può essere tossico a concentrazioni più elevate, portando a selenosi, caratterizzata da sintomi come disturbi gastrointestinali e problemi neurologici. I composti di Selenio possono presentare vari stati di ossidazione, che generalmente variano da -2 a +6, influenzando la loro reattività e applicazioni. Il suo numero CAS, 7782-49-2, è un identificatore unico utilizzato per specificare questo elemento in banche dati chimiche e documenti normativi. In generale, Selenio è un elemento versatile con proprietà sia benefiche che pericolose, a seconda della sua forma e concentrazione.
Formula:Se
InChI:InChI=1S/Se
InChI key:InChIKey=BUGBHKTXTAQXES-UHFFFAOYSA-N
SMILES:[Se]
Sinonimi:- B-TRAXIM Se
- Selen
- Selenio
- Selenium (Se)
- Selsaf 2000
- Serendipita MKCA6-3
- selenide
- Selenium
- VANDEX
- C.I. 77805
Ordinare per
Purezza (%)
0
100
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0
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50
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90
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95
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100
Selenium, powder, 99+%
CAS: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 SciFormula:SePurezza:99+%Colore e forma:Dark grey to black, PowderPeso molecolare:78.97Selenium powder, -200 mesh, 99.999% (metals basis)
CAS: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 SciFormula:SePurezza:99.999%Colore e forma:Powder, Pale grey to dark greyPeso molecolare:78.97Selenium shot, amorphous, 1-6mm (0.04-0.24in), Puratronic, 99.999+% (metals basis)
CAS: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 SciFormula:SePurezza:99.999+%Peso molecolare:78.97Selenium ingot/button,≈38mm (1.5 in.) dia.
CAS: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 SciSelenium shot, amorphous, 2-6mm (0.08-0.2in), Puratronic™, 99.999% (metals basis)
CAS: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 SciFormula:SePurezza:99.999%Peso molecolare:78.97Selenium powder, -325 mesh, 99.5% (metals basis)
CAS: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 SciFormula:SePurezza:99.5%Colore e forma:Grey to dark grey to black, PowderPeso molecolare:78.97Selenium powder (99.5%)
CAS:Selenium powder (99.5%)
Formula:SePurezza:(99.5%)Colore e forma:-200 meshPeso molecolare:78.96Selenium shot (99.99%)
CAS:Selenium shot (99.99%)
Formula:SePurezza:(99.99%)Colore e forma:gray pellets (~2mm dia.)Peso molecolare:78.96Selenium powder (99.99%)
CAS:Selenium powder (99.99%)
Formula:SePurezza:(99.99%)Colore e forma:-200 meshPeso molecolare:78.96Selenium, powder
CAS:Formula:SePurezza:≥ 99.5%Colore e forma:Dark grey to black powderPeso molecolare:78.96Selenium, amorphous shot 1-3mm
CAS:Selenium, amorphous shot 1-3mmFormula:SePurezza:99.999%Colore e forma:SolidPeso molecolare:78.95999Selenium (Powder)
CAS:Formula:SePurezza:>99.9%Colore e forma:White to Gray powder to crystalPeso molecolare:78.96Selenium Granules 2-4 mm, 99.999%
CAS:Formula:SePurezza:≥ 99.999%Colore e forma:Grey coloured granulesPeso molecolare:78.96Selenium, amorphous powder
CAS:Selenium, amorphous powderFormula:SePurezza:99.5%Colore e forma:Light grey Solid-PowderPeso molecolare:78.95999Selenium Powder -200 mesh, 99.8%
CAS:Formula:SePurezza:≥ 99.8%Colore e forma:Dark grey to black powderPeso molecolare:78.96Selenium
CAS:Selenium is a chemical element that has been shown to have anticancer properties. The anticancer activity of selenium may be due to its ability to bind to the glutathione peroxidase (GSH-Px) enzyme and increase its activities. Selenium can also activate other enzymes, such as thioredoxin reductase and glutathione reductase, which are involved in reducing reactive oxygen species. Selenium has been shown to reduce the growth of cancer cells by inhibiting cell proliferation and inducing apoptosis. It is also used as a redox probe for plasma mass spectrometry measurements and has been used as a fluorescent probe for fluorescence detection in reaction solutions. Selenium is an essential trace mineral for humans and animals, with high values found in Brazil nuts, seafood, grains, cereals, eggs, beef liver, pork liver, and oysters. Selenium is also required for photosynthesis in plants and algae where it acts as a cofactor
Formula:SePurezza:Min. 95%Peso molecolare:78.96 g/mol
