229946

Sigma-Aldrich

Sodium tetraborate

99.998% trace metals basis

Synonym(s):
Borax, fused
Linear Formula:
Na2B4O7
CAS Number:
Molecular Weight:
201.22
EC Number:
MDL number:
PubChem Substance ID:
NACRES:
NA.22

Quality Level

assay

99.998% trace metals basis

form

powder

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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Application

Sodium tetraborate, also known as borax(Na2B4O7), can be employed as a catalyst:
  • In the chemoselective oxidation of alkyl and aryl sulfides to sulfoxides and sulfones using H2O2 as the oxidant.
  • In the synthesis of pyridines, dienes, anilines, and dihydropyrano[3,2-c]chromenes via Knoevenagel condensation and Michael addition pathway.
  • In thiolysis of 1,2-epoxides to β-hydroxy sulfides.

Packaging

5, 25, 100 g in glass bottle

Legal Information

pictograms

Exclamation markHealth hazard

signalword

Danger

hazcat

Eye Irrit. 2 - Repr. 1B

storage_class_code

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

Personal Protective Equipment

dust mask type N95 (US),Eyeshields,Gloves

Certificate of Analysis

Certificate of Origin

Borax-catalyzed thiolysis of 1, 2-epoxides in aqueous medium
Gao P, et al.
Tetrahedron Letters, 49(46), 6536-6538 (2008)
Borax catalyzed domino reactions: synthesis of highly functionalised pyridines, dienes, anilines and dihydropyrano [3, 2-c] chromenes
Molla A and Hussain S
Royal Society of Chemistry Advances, 4(56), 29750-29758 (2014)
Borax-Catalyzed and pH-Controlled Selective Oxidation of Organic Sulfides by H2O2: An Environmentally Clean Protocol
Hussain S, et al.
European Journal of Organic Chemistry, 2009(20), 3319-3322 (2009)
Shuai Liu et al.
Journal of the American Heart Association, 9(8), e014757-e014757 (2020-04-21)
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Jamshed Iqbal et al.
Journal of chromatography. A, 1218(29), 4764-4771 (2011-06-15)
A simple, efficient, and highly sensitive in-line CE method was developed for the characterization and for inhibition studies of the nucleoside-metabolizing enzymes purine nucleoside phosphorylase (PNP) and adenosine deaminase (ADA) present in membrane preparations of human 1539 melanoma cells. After...

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