Sodium Borohydride
Sodium Borohydride (NaBH4) is a highly effective, versatile reducing agent widely used in organic synthesis and industrial processes.
Description
Sodium Borohydride, with the chemical formula NaBH4 and CAS Registry Number 16940-66-2, is an inorganic chemical compound primarily recognized for its potent reducing capabilities. It is a white, crystalline, hygroscopic solid that is soluble in water, lower alcohols (such as methanol and ethanol), and certain ethereal solvents (e.g., tetrahydrofuran, diglyme). NaBH4 acts as a mild and selective reducing agent, capable of reducing aldehydes, ketones, and acyl halides to their corresponding alcohols, and imines to amines, without affecting carboxylic acids, esters, or nitro groups under typical conditions. Its selectivity makes it invaluable in synthesizing complex organic molecules where other functional groups need to remain intact. The reducing power originates from the hydride (H-) ions it donates. Its reactivity can be modulated by choice of solvent and temperature, enabling fine control over reduction processes. It is a stable compound under dry conditions but reacts vigorously with strong acids and oxidizing agents.
Applications
Sodium Borohydride finds extensive application across various industrial sectors. It is crucially employed in the pharmaceutical industry for the synthesis of active pharmaceutical ingredients (APIs), including antibiotics, steroids, and sedatives. In fine chemical manufacturing, it facilitates the production of intermediates and specialty chemicals. The pulp and paper industry utilizes NaBH4 for bleaching wood pulp, improving paper brightness and quality. It is also used in the treatment of wastewater to reduce heavy metal ions, such as mercury and silver, and to remove formaldehyde. Furthermore, it plays a role in the synthesis of polymers and the regeneration of catalysts. Its broad utility stems from its selective and efficient reducing properties, making it an indispensable reagent for numerous chemical processes.
Storage & Handling
Store in a cool, dry, well-ventilated area in tightly sealed containers. Protect from moisture, heat, and incompatible materials. Handle with appropriate personal protective equipment to avoid skin and eye contact, and inhalation of dust. Avoid generating dust.
Danger
- H225 Highly flammable liquid
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