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
229865
Selenium
powder, −100 mesh, 99.99% trace metals basis
Synonym(s):
Se powder, Selenium metal powder
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| Size/SKU | Availability | Price |
|---|
About This Item
description
gray
Quality Segment
assay
99.99% trace metals basis
form
powder
composition
Se
reaction suitability
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
Features and Benefits
✔ Consistent quality
✔ Ultra high purity
✔ Available at scale: bulk and pilot scale
1 of 1
This Item | |||
|---|---|---|---|
| description powder, −100 mesh, 99.99% trace metals basis | description powder, −100 mesh, ≥99.5% trace metals basis | description pellets, <5 mm particle size, ≥99.999% trace metals basis | description powder, max. particle size 250 micron, weight 200 g, purity 99.95% |
| assay 99.99% trace metals basis | assay ≥99.5% trace metals basis | assay ≥99.999% trace metals basis | assay 99.95% |
| form powder | form powder | form pellets | form powder |
| 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.) |
| bp 684.9 °C (lit.) | bp 684.9 °C (lit.) | bp 684.9 °C (lit.) | bp 684.9 °C (lit.) |
| resistivity 1.2 μΩ-cm, 0°C | resistivity 1.2 μΩ-cm, 0°C | resistivity 1.2 μΩ-cm, 0°C | resistivity 1.2 μΩ-cm, 0°C |
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signalword
Danger
hcodes
Hazard Classifications
Acute Tox. 3 Inhalation - Acute Tox. 3 Oral - Aquatic Chronic 4 - STOT RE 2
Storage Class
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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Is this product suitable for human use?
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Unless otherwise stated, this product is intended for research use only. It is not suitable for any other purpose which includes but is not limited to unauthorized commercial use, in vitro diagnostic use, or therapeutic use in humans or animals.
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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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