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8.06373

Sigma-Aldrich

Sodium borohydride

fine granular for synthesis

Synonym(s):

Sodium borohydride, Sodium tetrahydridoborate

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About This Item

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

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

InChI

1S/BH4.Na/h1H4;/q-1;+1

InChI key

YOQDYZUWIQVZSF-UHFFFAOYSA-N

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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

signalword

Danger

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_germany

WGK 2

flash_point_f

Not applicable

flash_point_c

Not applicable

Certificates of Analysis (COA)

Search for Certificates of Analysis (COA) by entering the products Lot/Batch Number. Lot and Batch Numbers can be found on a product’s label following the words ‘Lot’ or ‘Batch’.

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