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
455571
Potassium borohydride
≥97%
Synonym(s):
Potassium tetrahydroborate
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About This Item
Recommended Products
grade
for analytical purposes
Quality Level
Assay
≥97%
form
powder
reaction suitability
reagent type: reductant
mp
500 °C (dec.) (lit.)
density
1.18 g/mL at 25 °C (lit.)
SMILES string
[K+].[H][B-]([H])([H])[H]
InChI
1S/BH4.K/h1H4;/q-1;+1
InChI key
ICRGAIPBTSPUEX-UHFFFAOYSA-N
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Application
- Copper nanoparticles by the reduction of copper salts.[1]
- Enantioselective allylic alcohols by the catalytic reduction of enones and ketones in the presence of chiral N,N′-dioxidescandium(III) complex catalyst.[2],·
- Azoxybenzenes by the reduction of nitroarenes in the presence of phase transfer catalyst PEG-400.[3]
It can also be employed as a boron source in the nickel–boron alloy, which is electrodeposited on carbon fiber to improve catalytic graphitization of carbon.[4]
Signal Word
Danger
Hazard Statements
Precautionary Statements
Hazard Classifications
Acute Tox. 3 Oral - Eye Dam. 1 - Repr. 1B - Skin Corr. 1B - Water-react 1
Storage Class Code
4.3 - Hazardous materials which set free flammable gases upon contact with water
WGK
nwg
Flash Point(F)
Not applicable
Flash Point(C)
Not applicable
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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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