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455571

Sigma-Aldrich

Potassium borohydride

≥97%

Synonym(s):

Potassium tetrahydroborate

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About This Item

Linear Formula:
KBH4
CAS Number:
13762-51-1
Molecular Weight:
53.94
EC Number:
237-360-5
MDL number:
MFCD00011396
UNSPSC Code:
12352306
PubChem Substance ID:
24868580
NACRES:
NA.22

Quality Level

200

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

Potassium borohydride (KBH4) can be used as a reducing agent for the synthesis of:       
  • Copper nanoparticles by the reduction of copper salts.
  •  Enantioselective allylic alcohols by the catalytic reduction of enones and ketones in the presence of chiral N,N′-dioxidescandium(III) complex catalyst.,·        
  • Azoxybenzenes by the reduction of nitroarenes in the presence of phase transfer catalyst PEG-400.

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.

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

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

Certificates of Analysis (COA)

Search for Certificates of Analysis (COA) by entering the products Lot/Batch Number. Lot and Batch Numbers can be found on a product’s label following the words ‘Lot’ or ‘Batch’.

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S. Yan and S. Zhang,
International Journal of Hydrogen Energy, 36, 13392-13397 (2011)
A. Yin, et al.,
Applied Catalysis, 400, 39-47 (2011)
Gang Lian et al.
Dalton transactions (Cambridge, England : 2003), 40(26), 6961-6967 (2011-06-07)
Cubic boron nitride (cBN) is synthesized by a low-temperature solid state synthesis and in situ phase transformation route with NH(4)BF(4), B, NaBH(4) and KBH(4) as the boron sources and NaN(3) as the nitrogen source. Furthermore, two new strategies are developed
Feng Li et al.
Journal of chromatography. A, 1081(2), 232-237 (2005-07-26)
A novel method for speciation analysis of inorganic arsenic was developed by on-line hyphenating microchip capillary electrophoresis (chip-CE) with hydride generation atomic fluorescence spectrometry (HG-AFS). Baseline separation of As(III) and As(V) was achieved within 54 s by the chip-CE in
G A Francis et al.
Biochemistry, 19(22), 5104-5111 (1980-10-28)
Reduction with [3H]KBH4 of Schiff's bases generated by reaction with pyridoxal 5'-phosphate (which cannot penetrate the intact cytoplasmic membrane) yields tritium-labeled derivatives of both proteins and lipids accessible on the periplasmic side of the cytoplasmic membrane. Application of this technique
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