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455571

Sigma-Aldrich

Potassium borohydride

≥97%

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Synonym(s):
Potassium tetrahydroborate
Linear Formula:
KBH4
CAS Number:
Molecular Weight:
53.94
EC Number:
MDL number:
PubChem Substance ID:
NACRES:
NA.22

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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1 of 4

This Item
438472213462P3786
Potassium borohydride ≥97%

Sigma-Aldrich

455571

Potassium borohydride

Potassium borohydride 99.9% trace metals basis

Sigma-Aldrich

438472

Potassium borohydride

Sodium borohydride ReagentPlus®, 99%

Sigma-Aldrich

213462

Sodium borohydride

form

powder

form

powder

form

powder

form

powder

mp

500 °C (dec.) (lit.)

mp

500 °C (dec.) (lit.)

mp

>300 °C (dec.) (lit.)

mp

-

density

1.18 g/mL at 25 °C (lit.)

density

1.18 g/mL at 25 °C (lit.)

density

-

density

-

Quality Level

200

Quality Level

200

Quality Level

300

Quality Level

200

reaction suitability

reagent type: reductant

reaction suitability

reagent type: reductant

reaction suitability

reagent type: reductant

reaction suitability

-

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 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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Catalytic graphitization of carbon fibers with electrodeposited Ni-B alloy coating
Zhou H, et al.
Materials Chemistry and Physics, 110(2-3), 434-439 (2008)
Peng He et al.
Organic letters, 14(19), 5134-5137 (2012-09-28)
The first catalytic enantioselective 1,2-reduction of enones with 0.45 mol equiv potassium borohydride solution catalyzed by a chiral N,N'-dioxide-Sc(III) complex catalyst was accomplished under mild reaction conditions. A number of optically active allylic alcohols were obtained in good to excellent
Preparation of copper nanoparticles by chemical reduction method using potassium borohydride
Zhang Q-L, et al.
Transactions of Nonferrous Metals Society of China, 20, 240-s244-240-s244 (2010)
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
S. Yan and S. Zhang,
International Journal of Hydrogen Energy, 36, 13392-13397 (2011)

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