8.06373

Sodium borohydride

fine granular for synthesis

• Synonym(s): Sodium borohydride, Sodium tetrahydridoborate
• Empirical Formula (Hill Notation): H₄BNa
• CAS Number: 16940-66-2
• Molecular Weight: 37.83
• MDL number: MFCD00003518
• UNSPSC Code: 12352306
• EC Index Number: 241-004-4
• NACRES: NA.22

Properties

• vapor pressure: <1 hPa ( 25 °C)
• Quality Level: 200
• form: solid
• autoignition temp.: 220 °C
• potency: 160 mg/kg LD₅₀, oral (Rat); 230 mg/kg LD₅₀, skin (Rabbit)
• expl. lim.: 3.02 % (v/v)
• reaction suitability: reagent type: reductant
• pH: 11 (20 °C, 10 g/L in H₂O)
• bp: 500 °C (decomposition)
• mp: >360 °C (slow decomposition)
• transition temp: flash point 69 °C
• density: 1.07 g/cm³ at 20 °C
• bulk density: 350‑500 kg/m³
• storage temp.: 2-30°C
• SMILES string: [Na+].[B-H2]
• InChI: 1S/BH4.Na/h1H4;/q-1;+1
• InChI key: YOQDYZUWIQVZSF-UHFFFAOYSA-N

Description

General description

Sodium borohydride (NaBH₄) is the most commonly available borohydride used in several industrial applications. It is considered as a selective reducing agent due to its ability to selectively reduce aldehydes and ketones into their corresponding alcohols in the presence of other functional groups such as nitro, ester, amide, lactone, epoxide, and nitriles. Ethanol and methanol are usually employed as solvents in NaBH₄ reduction reactions.

Application

Sodium borohydride (fine granular) can be used as a reducing agent to prepare:

• Zero valent iron nanoparticles supported on mesoporous carbon (Starbon) by in situ reductions of Fe³⁺ ions.
• Ag nanoparticles on graphene using AgNO₃ as a precursor.
• Ag-Pd/ZrO₂ catalytic system applicable in plasmonic catalysis. It can also be used as a source to store as well as generate hydrogen for energy-carrier applications.

Analysis Note

Assay (hypochlorite): ≥ 98.0 %
Identity (ICP-OES): passes test

Safety Information

• Pictograms: GHS02,GHS05,GHS06,GHS08
• Signal Word: Danger
• Hazard Statements: H260 - H301 - H314 - H360FD
• Precautionary Statements: P231 + P232 - P260 - P280 - P303 + P361 + P353 - P304 + P340 + P310 - P305 + P351 + P338
• Hazard Classifications: Acute Tox. 3 Oral - Eye Dam. 1 - Repr. 1B - Skin Corr. 1B - Water-react 1
• Supplementary Hazards: EUH014
• 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