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229865

Sigma-Aldrich

硒

powder, −100 mesh, 99.99% trace metals basis

别名:

Se powder, Selenium metal powder

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About This Item

经验公式（希尔记法）:
Se
CAS号:
7782-49-2
分子量:
78.96
EC號碼:
231-957-4
MDL號碼:
MFCD00134090
分類程式碼代碼:
12141910
PubChem物質ID:
24853754
NACRES:
NA.23
价格与库存信息目前不能提供

描述

gray

品質等級

100

化驗

99.99% trace metals basis

形狀

powder

電阻係數

1.2 μΩ-cm, 0°C

粒徑

−100 mesh

bp

684.9 °C (lit.)

mp

217 °C (lit.)

密度

4.81 g/mL at 25 °C (lit.)

SMILES 字串

[Se]

InChI

1S/Se

InChI 密鑰

BUGBHKTXTAQXES-UHFFFAOYSA-N

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相关类别

一般說明

硒粉是由硒氧化物还原而来，是一种由小颗粒硒元素组成的细粉状物质。硒粉呈灰色或银色，可能有金属光泽该产品可通过100目筛网，表明其颗粒很小，直径约为150微米或更小。此外，该产品纯度较高，杂质浓度极低，适用于科研应用、化学测试和电子元件的生产。

應用

硒是 Dulbecco′s 改良的 Eagle 培养基中的一种成分，用于α小鼠肝脏（AML）-12肝细胞细胞系的细胞培养。[1]Se 还用于水基合成谷胱甘肽封端的硒化镉量子点（GSH-CdSe QDs）。3Se 用于合成 CdSe，其通过改变半导体纳米结构的尺寸和形状而用于调节量子点太阳能电池的光响应。[2]

特點和優勢

我们99.99%的硒粉粒径小于150微米，非常适用于电子、化学测试及对纯度要求较高的研究中。
✔；质量稳定
✔；超高纯度
✔；可扩展：提供大规模和试点规模

象形圖

Skull and crossbonesHealth hazard
GHS06,GHS08

訊號詞

Danger

危險分類

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

儲存類別代碼

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

水污染物質分類（WGK）

WGK 2

閃點（°F）

Not applicable

閃點（°C）

Not applicable

個人防護裝備

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

历史批次信息供参考:

分析证书(COA)

Lot/Batch Number
MKCW6141
MKCV9092
MKCW0316
MKCV2829
MKCR7360

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István Robel et al.
Journal of the American Chemical Society, 128(7), 2385-2393 (2006-02-16)
By using bifunctional surface modifiers (SH-R-COOH), CdSe quantum dots (QDs) have been assembled onto mesoscopic TiO(2) films. Upon visible light excitation, CdSe QDs inject electrons into TiO(2) nanocrystallites. Femtosecond transient absorption as well as emission quenching experiments confirm the injection
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
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
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
Songtao Li et al.
Biochimica et biophysica acta, 1841(1), 22-33 (2013-09-24)
Saturated fatty acids (SFAs) induce hepatocyte cell death, wherein oxidative stress is mechanistically involved. Nuclear factor (erythroid-derived 2)-like 2 (Nrf2) is a master transcriptional regulator of cellular antioxidant defense enzymes. Therefore, Nrf2 activation is regarded as an effective strategy against
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  1. How is shipping temperature determined? And how is it related to the product storage temperature?

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    1. Products may be shipped at a different temperature than the recommended long-term storage temperature. If the product quality is sensitive to short-term exposure to conditions other than the recommended long-term storage, it will be shipped on wet or dry-ice. If the product quality is NOT affected by short-term exposure to conditions other than the recommended long-term storage, it will be shipped at ambient temperature. As shipping routes are configured for minimum transit times, shipping at ambient temperature helps control shipping costs for our customers. For more information, please refer to the Storage and Transport Conditions document: https://www.sigmaaldrich.com/deepweb/assets/sigmaaldrich/marketing/global/documents/316/622/storage-transport-conditions-mk.pdf

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  2. How can I determine the shelf life / expiration / retest date of this product?

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    1. If this product has an expiration or retest date, it will be shown on the Certificate of Analysis (COA, CofA). If there is no retest or expiration date listed on the product's COA, we do not have suitable stability data to determine a shelf life. For these products, the only date on the COA will be the release date; a retest, expiration, or use-by-date will not be displayed.
      For all products, we recommend handling per defined conditions as printed in our product literature and website product descriptions. We recommend that products should be routinely inspected by customers to ensure they perform as expected.
      For products without retest or expiration dates, our standard warranty of 1 year from the date of shipment is applicable.
      For more information, please refer to the Product Dating Information document: https://www.sigmaaldrich.com/deepweb/assets/sigmaaldrich/marketing/global/documents/449/386/product-dating-information-mk.pdf

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