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/418/501/product-dating-information-06-25-mk.pdf
209651
Selenium
powder, −100 mesh, ≥99.5% trace metals basis
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| A voi/SKU | Disponibilità | Prezzo |
|---|---|---|
50 g | Per conoscere la disponibilità, visualizza il carrello | CHF 119.00 |
250 g | Per conoscere la disponibilità, visualizza il carrello | CHF 385.00 |
Informazioni su questo articolo
description
gray
Quality Segment
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
General description
Application
1 of 1
Questo articolo | |||
|---|---|---|---|
| assay ≥99.5% trace metals basis | assay 99.99% trace metals basis | assay 99.95% | assay 99.95% |
| reaction suitability reagent type: catalyst | reaction suitability - | reaction suitability - | reaction suitability - |
| form powder | form powder | form powder | form powder |
| bp 684.9 °C (lit.) | bp 684.9 °C (lit.) | bp 684.9 °C (lit.) | bp 684.9 °C (lit.) |
| mp 217 °C (lit.) | mp 217 °C (lit.) | mp 217 °C (lit.) | mp 217 °C (lit.) |
| density 4.81 g/mL at 25 °C (lit.) | density 4.81 g/mL at 25 °C (lit.) | density 4.81 g/mL at 25 °C (lit.) | density 4.81 g/mL at 25 °C (lit.) |
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signalword
Danger
hcodes
Hazard Classifications
Acute Tox. 3 Inhalation - Acute Tox. 3 Oral - Aquatic Chronic 4 - STOT RE 2
Classe di stoccaggio
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
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How can I determine the shelf life / expiration / retest date of this product?
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How is shipping temperature determined? And how is it related to the product storage temperature?
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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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