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221732

Sigma-Aldrich

Sodium tetraborate

99%

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:
24853258
NACRES:
NA.22

Agency

suitable for SM 4500 - NH3

Quality Level

200

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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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

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

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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Borax-Mediated Formation of Carbon Aerogels from Glucose
Fellinger T-P, et al.
Advances in Functional Materials, 22(15), 3254-3260 (2012)
Zichen Zhao et al.
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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)
Siyu Liu et al.
ACS nano, 14(11), 15936-15943 (2020-11-13)
Flat, membrane-like materials made of graphene oxide (GO) nanoflakes have extraordinary mechanical properties including high stiffness, high strength, and low weight. However, the forming of complex nonplanar structures from flat GO membranes is difficult because of the intrinsic brittleness of
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Journal of agricultural and food chemistry, 67(31), 8431-8440 (2019-05-09)
Glufosinate-resistant Lolium perenne L. spp. multiflorum biotypes from Oregon exhibited resistance levels up to 2.8-fold the field rate. One resistant biotype (MG) had an amino acid substitution in glutamine synthetase 2 (GS2), whereas the other (OR) exhibited the wild-type genotype.
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