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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
Assay:
99%
form:
solid

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

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Certificates of Analysis (COA)

Lot/Batch Number
BCCM5965
BCCK2268
BCCH6343
BCCG2816
BCCD1024

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  1. Which document(s) contains shelf-life or expiration date information for a given product?

    If available for a given product, the recommended re-test date or the expiration date can be found on the Certificate of Analysis.

  2. How do I get lot-specific information or a Certificate of Analysis?

    The lot specific COA document can be found by entering the lot number above under the "Documents" section.

  3. How do I find price and availability?

    There are several ways to find pricing and availability for our products. Once you log onto our website, you will find the price and availability displayed on the product detail page. You can contact any of our Customer Sales and Service offices to receive a quote.  USA customers:  1-800-325-3010 or view local office numbers.

  4. What is the Department of Transportation shipping information for this product?

    Transportation information can be found in Section 14 of the product's (M)SDS.To access the shipping information for this material, use the link on the product detail page for the product. 

  5. Is Product 221732, Sodium tetraborate, soluble in water?

    Per the chemicals encyclopedia published by the Royal Society of Chemistry this product is slow to dissolve in water and may require heat at 40°C and stirring. We have tested the solubility at 33 mg/mL water.

  6. Do we offer a more water soluble Sodium tetraborate?

    Product No. S9640, Sodium tetraborate decahydrate, is soluble in water at 62 mg/mL or 160 mM. If you use hot water you can get a 4.4 M solution.

  7. What is the appearance of Product 221732,  Sodium tetraborate?

    This product is a powder. It may be either crystalline or granular.

  8. Is Product 221732,  Sodium tetraborate, a fused borax?

    Yes, Product No. 221732 is a fused borax.

  9. My question is not addressed here, how can I contact Technical Service for assistance?

    Ask a Scientist here.

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)
Zichen Zhao et al.
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UV-B illumination facilitates aggregation of alpha-lactalbumin (α-LA) by intramolecular disulfide bond cleavage followed by intermolecular thiol-disulfide exchange reactions. However, long term exposure to UV-B illumination may induce undesired oxidative modifications of amino acid residues in the protein. The purpose of
Borax-Mediated Formation of Carbon Aerogels from Glucose
Fellinger T-P, et al.
Advances in Functional Materials, 22(15), 3254-3260 (2012)
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
Caio A C G Brunharo et al.
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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