Sodium Borohydride CAS 16940-66-2

CAS Number: 16940-66-2
Name: Sodium Borohydride
Molecular Formula: NaBH4
PubChem CID: 4311764
Molecular Weight: 37.83 g/mol
Appearance: White to grayish crystalline powder
Use: Reducing agent for the reduction of alkyl halides

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Sodium borohydride, a representative borohydride reagent, acts as an efficient source of nucleophilic hydride in an aprotic polar solvent, such as DMSO, sulfolane, HMPA, DMF, or diglyme, and is used for the reduction of alkyl halides. Sodium borohydride (CAS 16940-66-2) is a potent and versatile reducing agent.

CAS 16940-66-2 Sodium Borohydride Technical Information:

Product Name

Sodium borohydride

CAS Number


PubChem ID


Molecular Formula


Molecular Weight


Melting Point

>300 °C (dec.) (lit.)

Boiling Point



White powder


Store at RT.


Water Solubility 550 g/L (25 ºC)



Sodium Borohydride As a Reducing Agent

Sodium borohydride (NaBH4) is a powerful reducing agent for the reduction of aldehydes and ketones. Below is a summary of sodium borohydride (CAS 16940-66-2) in organic synthesis. 

Sodium Borohydride as reducing agent


Sodium Borohydride Applications:

Sodium borohydride (CAS 16940-66-2) has a wide range of uses in many industries.

In chemical synthesis, sodium borohydride (CAS 16940-66-2) is used to turn aldehydes into alcohols and ketones. This makes it easier to make useful organic compounds. It is also a key component in the recovery of precious metals like gold, platinum, and silver. In the polymer industry, it is used to control the molecular structure and weight of polymers, allowing for tailored polymers with specific properties. Sodium borohydride’s potential for hydrogen storage in fuel cells is being investigated. When it combines with water, it produces hydrogen gas, making it a promising choice for clean energy.

Safety Considerations:

Although sodium borohydride can be a valuable and versatile chemical reagent, it must still be handled with care.

  • Storage: Store Sodium Borohydride (CAS 16940-66-2) away from moisture and other incompatible substances. It should be stored in a tightly sealed container.
  • Protection: Wear appropriate PPE, including goggles and a lab jacket, when working with sodium borohydride to avoid contact with skin, eyes, and clothing.
  • Handling: Use caution when handling sodium borohydride. It reacts violently with strong acids and can release hydrogen gases when exposed to moisture or water. Add it slowly to the mixture.
  • Ventilation: Make sure that the workplace is properly ventilated to ensure that any fumes or gases are dispersed.

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