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452882

Sigma-Aldrich

Sodium borohydride

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Sodium borohydride
1 of 1 reviewers received a sample product or took part in a promotion

powder, ≥98.0%

Synonym(s):

Sodium tetrahydridoborate

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About This Item

Linear Formula:
NaBH4
CAS Number:
Molecular Weight:
37.83
EC Number:
MDL number:
UNSPSC Code:
12352302
PubChem Substance ID:
NACRES:
NA.22
Assay:
≥98.0%
form:
powder
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Quality Level

Assay

≥98.0%

form

powder

contains

0.45-0.70% Magnesium carbonate as anticaking agent

reaction suitability

reagent type: reductant

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impurities

≤100 ppm Silica

mp

>300 °C (dec.) (lit.)

cation traces

Fe: ≤5 ppm

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SMILES string

[BH4-].[Na+]

InChI

1S/BH4.Na/h1H4;/q-1;+1

InChI key

YOQDYZUWIQVZSF-UHFFFAOYSA-N

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General description

Sodium borohydride (NaBH4) is the most commonly available borohydride, synthesized by reacting methylborate with sodium hydride in mineral oil. It is employed as a precursor for producing other metal borohydrides. Various approaches for qualitative and quantitative monitoring of sodium borohydride have been explained.[1] The potential of NaBH4 to store as well as generate hydrogen for fuel cells has been investigated.[2][3]
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Application

Sodium borohydride can be used as a reducing agent:        
  • To prepare saturated alcohols by the reduction of conjugated aldehydes and ketones.[4]        
  • Along with Raney nickel for the reduction of aromatic nitro compounds to arylamines.[5]        
  • In the synthesis of secondary amines by reductive amination of ketones and aldehydes in the presence of an acid catalyst.[6]       
  • In the synthesis of δ and γ lactones by the reduction of cyclic anhydrides.[7]       
  • For the chemoselective reduction of N -protected amino acids and peptides to corresponding alcohols.[8]

Legal Information

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Signal Word

Danger

Hazard Statements

Hazard Classifications

Acute Tox. 3 Oral - Eye Dam. 1 - Repr. 1B - Skin Corr. 1B - Water-react 1

Supplementary Hazards

Storage Class Code

4.3 - Hazardous materials which set free flammable gases upon contact with water

WGK

WGK 2

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Personal Protective Equipment

dust mask type N95 (US), Eyeshields, Gloves

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Certificates of Analysis (COA)

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Saberi D, et al.
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Rapid, efficient and selective reduction of aromatic nitro compounds with sodium borohydride and Raney nickel
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Articles

An article about metal borohydrides as hydrogen storage materials

Questions

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  1. How can I determine the shelf life / expiration / retest date of this product?

    1 answer
    1. 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

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  2. How is shipping temperature determined? And how is it related to the product storage temperature?

    1 answer
    1. 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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