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Merck
CN

229946

Sodium tetraborate

99.998% trace metals basis

Synonym(s):

Borax, fused

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About This Item

Linear Formula:
Na2B4O7
CAS Number:
1330-43-4
Molecular Weight:
201.22
EC Number:
215-540-4
MDL number:
MFCD00081185
UNSPSC Code:
12352302
PubChem Substance ID:
24853761
NACRES:
NA.22
Assay:
99.998% trace metals basis
Form:
powder

Key Documents

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Quality Level

100

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.

Legal Information

Pictograms

Health hazardExclamation mark
GHS08,GHS07

Signal Word

Danger

Hazard Statements

H319,H360FD

Hazard Classifications

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

WGK 1

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Personal Protective Equipment

dust mask type N95 (US), Eyeshields, Gloves

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Certificates of Analysis (COA)

Lot/Batch Number
MKCZ8241
MKCQ3671
MKCL9036
MKCN9416
MKCJ7761

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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)
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 thiolysis of 1, 2-epoxides in aqueous medium
Gao P, et al.
Tetrahedron Letters, 49(46), 6536-6538 (2008)
Shuai Liu et al.
Journal of the American Heart Association, 9(8), e014757-e014757 (2020-04-21)
Background The protective effects of polyamines on cardiovascular disease have been demonstrated in many studies. However, the roles of spermidine, a natural polyamine, in abdominal aortic aneurysm (AAA) disease have not been studied. In this study, we investigated the influence
Shridhar K Sathe et al.
Journal of agricultural and food chemistry, 57(17), 7846-7856 (2009-08-07)
The solubility of almond, Brazil nut, cashew nut, hazelnut, macadamia, pecan, pine nut, pistachio, walnut, and peanut proteins in several aqueous solvents was qualitatively and quantitatively assessed. In addition, the effects of extraction time and ionic strength on protein solubility
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