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204307

Sigma-Aldrich

Selenium

pellets, <5 mm particle size, ≥99.999% trace metals basis

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5 G
R$ 448,00
20 G
R$ 1.129,00
100 G
R$ 2.023,00

R$ 448,00


Previsão de entrega em11 de abril de 2025


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5 G
R$ 448,00
20 G
R$ 1.129,00
100 G
R$ 2.023,00

About This Item

Fórmula empírica (Notação de Hill):
Se
Número CAS:
Peso molecular:
78.96
Número CE:
Número MDL:
Código UNSPSC:
12141910
ID de substância PubChem:
NACRES:
NA.23

R$ 448,00


Previsão de entrega em11 de abril de 2025


Solicite uma grande encomenda

descrição

gray

Nível de qualidade

Ensaio

≥99.999% trace metals basis

Formulário

pellets

resistividade

1.2 μΩ-cm, 0°C

tamanho de partícula

<5 mm

p.e.

684.9 °C (lit.)

pf

217 °C (lit.)

densidade

4.81 g/mL at 25 °C (lit.)

cadeia de caracteres SMILES

[Se]

InChI

1S/Se

chave InChI

BUGBHKTXTAQXES-UHFFFAOYSA-N

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Descrição geral

Selenium is a non-metallic p-type semiconductor and is commercially produced as a by-product in refining sulfide-bearing copper minerals. It has good photovoltaic and photoconductive properties and is extensively used in the electronics such as solar cells, light meters, and, photocells. It also finds application in the field of ceramics, pigments, metallurgy, agriculture, glasses, and lubricants.

Aplicação

Selenium has been used as a starting material tosynthesize selenium nanoparticles.

Pictogramas

Skull and crossbonesHealth hazard

Palavra indicadora

Danger

Frases de perigo

Classificações de perigo

Acute Tox. 3 Inhalation - Acute Tox. 3 Oral - Aquatic Chronic 4 - STOT RE 2

Código de classe de armazenamento

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

Classe de risco de água (WGK)

WGK 2

Ponto de fulgor (°F)

Not applicable

Ponto de fulgor (°C)

Not applicable

Equipamento de proteção individual

Eyeshields, Faceshields, Gloves, type P2 (EN 143) respirator cartridges


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Waleed Alhazzani et al.
Critical care medicine, 41(6), 1555-1564 (2013-04-17)
Patients with sepsis syndrome commonly have low serum selenium levels. Several randomized controlled trials have examined the efficacy of selenium supplementation on mortality in patients with sepsis. To determine the efficacy and safety of high-dose selenium supplementation compared to placebo
Daniel D Karp et al.
Journal of clinical oncology : official journal of the American Society of Clinical Oncology, 31(33), 4179-4187 (2013-09-05)
Selenium has been reported to have chemopreventive benefits in lung cancer. We conducted a double-blind, placebo-controlled trial to evaluate the incidence of second primary tumors (SPTs) in patients with resected non-small-cell lung cancer (NSCLC) receiving selenium supplementation. Patients with completely
Kai-Oliver Feldmann et al.
Chemistry (Weinheim an der Bergstrasse, Germany), 21(27), 9697-9712 (2015-05-12)
Although a fairly large number of binary group 15/16 element cations have been reported, no example involving phosphorus in combination with a group 16 element has been synthesized and characterized to date. In this contribution is reported the synthesis and structural characterization
Claire M Weekley et al.
Nutrients, 5(5), 1734-1756 (2013-05-24)
Determining the speciation of selenium in vivo is crucial to understanding the biological activity of this essential element, which is a popular dietary supplement due to its anti-cancer properties. Hyphenated techniques that combine separation and detection methods are traditionally and
Brian D Laird et al.
The Journal of nutrition, 143(6), 923-930 (2013-04-26)
Elevated concentrations of mercury (Hg) are commonly found in the traditional foods, including fish and marine mammals, of Inuit living in Canada's Arctic. As a result, Inuit often have higher dietary Hg intake and elevated Hg blood concentrations. However, these

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