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
71950
Sodium selenite
anhydrous, ≥90.0% (RT)
Synonym(s):
Selenious acid disodium salt
Select a Size
| Size/SKU | Availability | Price |
|---|---|---|
100 g | Please contact Customer Service for Availability | CZK 2,880.00 |
500 g | Please contact Customer Service for Availability | CZK 6,920.00 |
About This Item
Quality Segment
assay
≥90.0% (RT)
form
powder
loss
≤0.5% loss on drying, 200 °C
mp
>350 °C (lit.)
SMILES string
[Na+].[Na+].[O-][Se]([O-])=O
InChI
1S/2Na.H2O3Se/c;;1-4(2)3/h;;(H2,1,2,3)/q2*+1;/p-2
InChI key
BVTBRVFYZUCAKH-UHFFFAOYSA-L
Application
- In dehydrogenation of benzoins to benzils and, flavanones to flavones under thermal and microwave conditions.
- As a catalyst along with cysteine or glutathione in the reductive debromination of vic-dibromides to alkenes.
- To prepare bis(methylmercuric) selenide (BMS) by reacting with methylmercuric chloride and reduced glutathione or cysteine.
1 of 1
This Item | |||
|---|---|---|---|
| form powder | form lyophilized powder | form powder | form powder or crystals |
| assay ≥90.0% (RT) | assay ≥97.0% | assay ≥99.0% (titration) | assay ≥99.0% (T) |
| Quality Level 200 | Quality Level 200 | Quality Level 200 | Quality Level 100 |
| mp >350 °C (lit.) | mp >350 °C (lit.) | mp - | mp 884 °C (lit.) |
| loss ≤0.5% loss on drying, 200 °C | loss - | loss - | loss ≤0.2% loss on ignition, 900 °C |
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signalword
Danger
Hazard Classifications
Acute Tox. 2 Inhalation - Acute Tox. 2 Oral - Aquatic Chronic 2 - Eye Irrit. 2 - Skin Irrit. 2 - Skin Sens. 1
supp_hazards
Storage Class
6.1A - Combustible acute toxic Cat. 1 and 2 / very toxic hazardous materials
wgk
WGK 2
flash_point_f
Not applicable
flash_point_c
Not applicable
ppe
Eyeshields, Faceshields, Gloves, type P3 (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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