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Sigma-Aldrich

Sodium borohydride

purum p.a., ≥96% (gas-volumetric)

Synonym(s):

Sodium tetrahydridoborate

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About This Item

Linear Formula:
NaBH4
CAS Number:
16940-66-2
Molecular Weight:
37.83
EC Number:
241-004-4
MDL number:
MFCD00003518
UNSPSC Code:
26111700
PubChem Substance ID:
57652284
NACRES:
NA.22
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grade

purum p.a.

Quality Level

200

Assay

≥96% (gas-volumetric)

form

powder

reaction suitability

reagent type: reductant

mp

>300 °C (dec.) (lit.)

anion traces

chloride (Cl-): ≤5000 mg/kg
sulfate (SO42-): ≤50 mg/kg

cation traces

Ca: ≤50 mg/kg
Cd: ≤50 mg/kg
Co: ≤50 mg/kg
Cu: ≤50 mg/kg
Fe: ≤50 mg/kg
K: ≤1000 mg/kg
Ni: ≤50 mg/kg
Pb: ≤50 mg/kg
Zn: ≤50 mg/kg

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 is considered as a selective reducing agent due to its ability to selectively reduce aldehydes and ketones into their corresponding alcohols in the presence of other functional groups such as nitro, ester, amide, lactone, epoxide, and nitriles that are otherwise susceptible to reduction.[1] It is being considered as a promising candidate for hydrogen storage applications.[2]

Application

Sodium borohydride may be used as a reductant and hydrogen source for the semi-hydrogenation of alkynes to the corresponding alkenes in the presence of nickel nanoparticles generated in situ from nickel chloride and methanol.[3] It can also be used as a reducing agent for the synthesis of gold nanoparticles from gold chloride.[4]

Other Notes

Reduction of carboxylic acid derivatives [5][6]

Signal Word

Danger

Hazard Statements

H260,H301,H314,H360FD

Hazard Classifications

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

Supplementary Hazards

EUH014

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)

Lot/Batch Number
STBL3757
STBL4966
STBK8191
STBK3716
STBJ9696

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Synthesis of thiol-derivatised gold nanoparticles in a two-phase liquid?liquid system.
Brust M
Journal of the Chemical Society. Chemical Communications, 7, 801-802 (1994)
G.W. Gribble
ACS Symp. Ser., 641, 167-167 (1996)
hemoselective reductions with sodium borohydride.
Ward D
Canadian Journal of Chemistry, 67(7), 1206-1211 (1989)
Thermo-economic analysis of a hydrogen production system by sodium borohydride (NaBH 4).
Rivarolo M
International Journal of Hydrogen Energy, 43(3), 1606-1614 (2018)
Ligand-free nickel-catalyzed semihydrogenation of alkynes with sodium borohydride: a highly efficient and selective process for cis-alkenes under ambient conditions.
Wen X
Chemical Communications (Cambridge, England), 53(39), 5372-5375 (2017)
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Questions

1–2 of 2 Questions  

  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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