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
• UNSPSC Code: 12352306
• EC Index Number: 241-004-4
• NACRES: NA.22
• MDL number: MFCD00003518
• Form: solid

Properties

• SMILES string: [Na+].[B-H2]
• InChI: 1S/BH4.Na/h1H4;/q-1;+1
• InChI key: YOQDYZUWIQVZSF-UHFFFAOYSA-N
• vapor pressure: <1 hPa ( 25 °C)
• 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
• Quality Level: 200

Description

Analysis Note

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

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.[1]
• Ag nanoparticles on graphene using AgNO₃ as a precursor.[2]
• Ag-Pd/ZrO₂ catalytic system applicable in plasmonic catalysis.[3] It can also be used as a source to store as well as generate hydrogen for energy-carrier applications.[4]

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.[5]

Safety Information

• pictograms: GHS02,GHS05,GHS06,GHS08
• signalword: Danger
• hcodes: H260 - H301 - H314 - H360FD
• pcodes: 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
• supp_hazards: EUH014
• Storage Class: 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