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
S0251
Sodium metaborate tetrahydrate
≥99%
Synonym(s):
Boric acid, sodium salt, tetrahydrate
Select a Size
| Size/SKU | Availability | Price |
|---|---|---|
500 g | Check Cart for Availability | $49.80 |
1 kg | Estimated to ship onJune 22, 2026fromMILWAUKEE | $77.70 |
About This Item
Quality Segment
assay
≥99%
form
powder
reaction suitability
core: sodium
SMILES string
O.O.O.O.[Na+].[O-]B=O
InChI
1S/BO2.Na.4H2O/c2-1-3;;;;;/h;;4*1H2/q-1;+1;;;;
InChI key
JAKYJVJWXKRTSJ-UHFFFAOYSA-N
General description
Application
- As a precursor to prepare an environment-friendly NaBO2/PMS catalytic system for efficient removal of organic pollutants.
- To enhance the flame-retardant properties of epoxy fireproof coatings.
Disclaimer
1 of 1
This Item | |||
|---|---|---|---|
| form powder | form powder | form solid | form powder |
| assay ≥99% | assay 99.995% trace metals basis | assay 99% | assay ≥98.0%, 98.0-102.0% (ACS specification) |
| Quality Level 200 | Quality Level 100 | Quality Level 200 | Quality Level 200 |
| reaction suitability core: sodium | reaction suitability core: lithium | reaction suitability - | reaction suitability - |
signalword
Warning
hcodes
Hazard Classifications
Eye Irrit. 2 - Repr. 2
Storage Class
11 - Combustible Solids
wgk
WGK 3
ppe
dust mask type N95 (US), Eyeshields, Gloves
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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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