Name: Sodium borohydride

CAS NO.: 16940-66-2

Formula: NaBH4

Content 99.5~~99（％）

Mol.vt: 37.85

Chemical properties:

Physical state: white crystalline powder particle

Melting point: 400C(slowly decomposes above 400C,completely decompose at higher temperature)

Specific gravity: 1.07-1.08

Solubility in water: Reactive(insoluble in ether and hydrocarbons)

Description and usage.

Sodium borohydride is a milder reducing agent, can be used in aqueous solution. It converts selectively aldehydes and ketones the corresponding alcohols in the manufacture of pharmaceuticals and other fine chemicals. It will not react with esters, amides, or carboxylic acids, the more powerful reducing agent lithium aluminum hydride(LAH) is used to reduce these compounds. LAH is the more powerful reducing agent than sodium borohydride due to the weaker Al-H bond compared to the B-H bond. The reactivity of sodium borohydride can be modified by addition of iodine or methanol in BH3-THF to reduce esters into the corresponding alcohols like the reaction of benzyl benzoate to benzyl alcohol. Sodium borohydride is used as a hydrogen source for fuel cell systems and a foaming agent for rubbers. Sodium cyanoborohydride converts certain alcohol groups to methylene groups. Sodium Cyanoborohydride is used as a selective amination reductant. It converts aldehydes (chemoselective), ketones (stereoselective) to the corresponding alcohols in the manufacture of pharmaceuticals and other fine chemicals. It is used in the reductive alkylation of amines, novel metals and oximes. Some examples of reducing agents are:   PHYSICAL STATE white crystalline powder particle