8.06373

Sodium borohydride

fine granular for synthesis

• Sinonimo/i: Sodium borohydride, Sodium tetrahydridoborate
• Formula empirica (notazione di Hill): H₄BNa
• Numero CAS: 16940-66-2
• Peso molecolare: 37.83
• Numero MDL: MFCD00003518
• Codice UNSPSC: 12352306
• Numero indice EU: 241-004-4

Proprietà

• Tensione di vapore: <1 hPa ( 25 °C)
• Livello qualitativo: 200
• Forma fisica: solid
• Temp. autoaccensione: 220 °C
• Potenza: 160 mg/kg LD₅₀, oral (Rat); 230 mg/kg LD₅₀, skin (Rabbit)
• Limite di esplosione: 3.02 % (v/v)
• Impiego in reazioni chimiche: reagent type: reductant
• pH: 11 (20 °C, 10 g/L in H₂O)
• P. eboll.: 500 °C (decomposition)
• Punto di fusione: >360 °C (slow decomposition)
• Temp. transizione: flash point 69 °C
• Densità: 1.07 g/cm³ at 20 °C
• Densità bulk: 350‑500 kg/m³
• Temperatura di conservazione: 2-30°C
• InChI: 1S/BH4.Na/h1H4;/q-1;+1; YOQDYZUWIQVZSF-UHFFFAOYSA-N

Descrizione

Descrizione generale

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.

Applicazioni

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.

Risultati analitici

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

Informazioni sulla sicurezza

• Pittogrammi: GHS02,GHS05,GHS06,GHS08
• Avvertenze: Danger
• Indicazioni di pericolo: H260 - H301 - H314 - H360FD
• Consigli di prudenza: P231 + P232 - P260 - P280 - P303 + P361 + P353 - P304 + P340 + P310 - P305 + P351 + P338
• Classi di pericolo: Acute Tox. 3 Oral - Eye Dam. 1 - Repr. 1B - Skin Corr. 1B - Water-react 1
• Rischi supp: EUH014
• Codice della classe di stoccaggio: 4.3 - Hazardous materials, which set free flammable gases upon contact with water
• Classe di pericolosità dell'acqua (WGK): WGK 2
• Punto d’infiammabilità (°F): Not applicable
• Punto d’infiammabilità (°C): Not applicable