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Key Documents

62460

Sigma-Aldrich

Lithium borohydride

≥95.0%

Synonym(s):

Lithium boron hydride, Lithium hydroborate

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About This Item

Linear Formula:
LiBH4
CAS Number:
Molecular Weight:
21.78
EC Number:
MDL number:
UNSPSC Code:
26111700
PubChem Substance ID:
NACRES:
NA.22

Quality Level

Assay

≥95.0%

form

solid

reaction suitability

reagent type: reductant

mp

275 °C (dec.)

density

0.666 g/mL at 25 °C (lit.)

SMILES string

[Li+].[BH4-]

InChI

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

InChI key

UUKMSDRCXNLYOO-UHFFFAOYSA-N

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Application

Lithium borohydride is a general reducing agent commonly used to reduce aldehydes, ketones esters, lactones, and epoxides. It catalyzes hydroboration of alkenes. It is also used in the preparation of other borohydrides such as aluminum borohydride.

Other Notes

Review; Smooth reduction of esters; Reduction of acids and other functional groups with LiBH4/Me3SiCl

Signal Word

Danger

Hazard Statements

Hazard Classifications

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

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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Mixed solvents containing methanol as useful reaction media for unique chemoselective reductions within lithium borohydride.
Soai, Kenso and Ookawa, Atsuhiro
The Journal of Organic Chemistry, 51(21), 4000-4005 (1986)
Lithium borohydride-catalyzed selective reduction of the carbonyl group of conjugated and unconjugated alkenones with borane in tetrahydrofuran.
Arase, Akira et al.
Journal of the Chemical Society. Chemical Communications, 51(7), 855-856 (1994)
The Preparation of Other Borohydrides by Metathetical Reactions Utilizing the Alkali Metal Borohydrides1.
Schlesinger, HI et al.
Journal of the American Chemical Society, 75(1), 209-213 (1953)
Lithium Borohydride.
eEROS (Encyclopedia of Reagents for Organic Synthesis) (2001)
H.C. Brown et al.
The Journal of Organic Chemistry, 47, 1604-1604 (1982)

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