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221732

Sigma-Aldrich

Sodium tetraborate

99%

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Synonym(s):
Borax, fused
Linear Formula:
Na2B4O7
CAS Number:
Molecular Weight:
201.22
EC Number:
MDL number:
PubChem Substance ID:

agency

suitable for SM 4500 - NH3

Quality Level

assay

99%

form

solid

mp

741 °C (lit.)

density

2.367 g/mL at 25 °C (lit.)

SMILES string

[Na+].[Na+].[O-]B1Ob2ob([O-])ob(O1)o2

InChI

1S/B4O7.2Na/c5-1-7-3-9-2(6)10-4(8-1)11-3;;/q-2;2*+1

InChI key

UQGFMSUEHSUPRD-UHFFFAOYSA-N

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This Item
7199771996B9876
Sodium tetraborate 99%

221732

Sodium tetraborate

-
Borax Anhydrous BioUltra, anhydrous, ≥99%

71997

Borax Anhydrous

Premium Grade
Borax Anhydrous puriss. p.a., anhydrous, ≥98.0% (T)

71996

Borax Anhydrous

-
Sodium tetraborate decahydrate ReagentPlus®, ≥99.5%

B9876

Sodium tetraborate decahydrate

-
assay

99%

assay

≥99%

assay

≥98.0% (T)

assay

≥99.5%

Quality Level

200

Quality Level

200

Quality Level

200

Quality Level

-

density

2.367 g/mL at 25 °C (lit.)

density

-

density

-

density

1.73 g/mL at 25 °C (lit.)

mp

741 °C (lit.)

mp

-

mp

-

mp

-

agency

suitable for SM 4500 - NH3

agency

-

agency

-

agency

suitable for SM 4500 - NH3

Application

Sodium tetraborate (Na2B4O7) can be used as a co-catalyst for the oxidation of alcohols to corresponding carbonyl compounds in greener non-chlorinated solvents in the presence of TEMPO/NaOCl. It is also used as a structure-directing agent as well as a catalyst in the preparation of carbon aerogels using glucose as the carbon precursor.

Legal Information

pictograms

Exclamation markHealth hazard

signalword

Danger

Hazard Classifications

Eye Irrit. 2 - Repr. 1B

Storage Class

6.1D - Non-combustible, acute toxic Cat.3 / toxic hazardous materials or hazardous materials causing chronic effects

wgk_germany

WGK 1

flash_point_f

Not applicable

flash_point_c

Not applicable

ppe

Eyeshields, Gloves, type P3 (EN 143) respirator cartridges


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Towards greener solvents for the bleach oxidation of alcohols catalysed by stable N-oxy radicals
Janssen MHA, et al.
Green Chemistry, 13(4), 905-912 (2011)
Borax-Mediated Formation of Carbon Aerogels from Glucose
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