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Specifications
| Appearance | White solid or crystals or crystalline chunk(s) |
| Solubility | Soluble in tetrahydrofuran |
| Melting Point | 126℃ to 129℃ |
| Assay (T) | 97.5% to 102.5% |
Applications
Tetrabutylammonium borohydride is widely used as a powerful, phase-transfer compatible reducing agent in organic synthesis. Its tetrabutylammonium cation imparts excellent solubility in nonpolar and moderately polar organic solvents, making it valuable for reductions carried out in homogeneous, nonaqueous systems. It is frequently employed in the reduction of aldehydes, ketones, acid chlorides, imines, and certain metal complexes under mild conditions. This compound is also used in selective reductive transformations such as reductive amination, dehalogenation, and hydride transfer reactions where controlled reactivity is essential. In addition to synthetic transformations, it finds applications in polymer modification, materials chemistry, and surface functionalization where hydride donors must remain stable and soluble in organic media. Its compatibility with ionic liquids and aprotic solvents further broadens its utility in advanced laboratory and industrial processes.
Benefits
Tetrabutylammonium borohydride offers several advantages due to its high solubility, strong hydride-donating capability, and selective reactivity. Because it is soluble in many organic solvents where inorganic borohydrides are not, it allows hydride reductions to proceed more efficiently in homogeneous organic phases, improving yields and reaction control. Its bulky, hydrophobic counterion prevents rapid decomposition in protic environments and supports enhanced stability relative to simple metal borohydrides. The compound also provides a milder and more controlled reduction profile, reducing the likelihood of over-reduction or unwanted side reactions. Furthermore, the reagent is easy to handle, typically nonpyrophoric in solid form, and exhibits strong compatibility with sensitive functional groups, enabling chemists to perform selective transformations under relatively gentle conditions. These characteristics make it highly suitable for both routine laboratory synthesis and more sophisticated, specialized applications.
Conclusion
Tetrabutylammonium borohydride (CAS 33725-74-5) is a versatile and efficient reducing agent particularly valued for its solubility and stability in organic media. Its strong hydride-donating power combined with selective reactivity enables controlled reductions of a broad range of functional groups. Whether applied in fine chemical synthesis, advanced materials development, or precision organic transformations, it provides chemists with a reliable and flexible tool for achieving high-quality reduction outcomes across diverse processes.
