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S9640

Sigma-Aldrich

Sodium tetraborate decahydrate

ACS reagent, ≥99.5%

Synonym(s):

Borax decahydrate, Sodium borate decahydrate

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About This Item

Linear Formula:
Na2B4O7 · 10H2O
CAS Number:
1303-96-4
Molecular Weight:
381.37
EC Number:
215-540-4
MDL number:
MFCD00149193
UNSPSC Code:
12352302
PubChem Substance ID:
329824630
NACRES:
NA.21
grade:
ACS reagent
form:
powder or crystals
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grade

ACS reagent

Quality Level

200

Agency

suitable for SM 4500 - NH3

vapor pressure

0.213 hPa ( 20 °C)

Assay

≥99.5%

form

powder or crystals

impurities

≤0.005% Insoluble matter

pH

9.15-9.20 (25 °C, 0.01 M in solution)

density

1.73 g/mL at 25 °C (lit.)

anion traces

chloride (Cl-): ≤0.001%
phosphate (PO43-): ≤0.001%
sulfate (SO42-): ≤0.005%

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Triethylamine hydrochloride suitable for HPLC, LiChropur™, 99.0-101.0% (AT)

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Triethylamine hydrochloride

Triethylamine hydrochloride ≥99.0% (AT)

90350

Triethylamine hydrochloride

Ammonium trifluoroacetate suitable for HPLC, 99.0-101.0% (NT)

56865

Ammonium trifluoroacetate

Sodium perchlorate monohydrate suitable for HPLC, LiChropur™, 99.0-101.0% (T)

56581

Sodium perchlorate monohydrate

technique(s)

HPLC: suitable

technique(s)

-

technique(s)

HPLC: suitable

technique(s)

HPLC: suitable

form

solid

form

crystals

form

solid

form

solid

solubility

H2O: 1 g/10 mL, clear, colorless

solubility

water: soluble 1 g/10 mL

solubility

H2O: 10%, clear, colorless

solubility

H2O: 5%, clear, colorless

mp

256-259 °C, 261 °C (dec.) (lit.)

mp

261 °C (dec.) (lit.)

mp

123-125 °C (lit.)

mp

-

impurities

≤1.0% water

impurities

-

impurities

-

impurities

-

General description

Sodium tetraborate decahydrate is a naturally occurring material used as a catalyst or additive for many organic transformations such as Nef reaction, Knoevenagel condensation, substitution, addition, selective methylation of vicinal diols, and desilylation of trimethylsilyl alkynones.

Application

Sodium tetraborate decahydrate can be used as a catalyst in the:
  • Regioselective thiolysis of 1,2-epoxides by using thiols to synthesize β-hydroxy sulfides.
  • Hetero-Michael addition of thiols with electron-deficient olefins to synthesize corresponding β-adducts.
  • Solvent-free Biginelli reaction to synthesize 3,4-dihydropyrimidin-2(1H)-ones.
It can also be used as an additive to prepare polypyrrole-borax composites with high dielectric properties.

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

  • Specification Sheet

    • Choose from one of the most recent versions:

    Certificates of Analysis (COA)

    Lot/Batch Number
    BCCN0281
    BCCM4928
    WXBF3070V
    BCCL9614
    BCCL9613

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    Federico Corti et al.
    Nature communications, 10(1), 1562-1562 (2019-04-07)
    The proteoglycan Syndecan-2 (Sdc2) has been implicated in regulation of cytoskeleton organization, integrin signaling and developmental angiogenesis in zebrafish. Here we report that mice with global and inducible endothelial-specific deletion of Sdc2 display marked angiogenic and arteriogenic defects and impaired
    Maxime Mivelaz et al.
    Methods (San Diego, Calif.), 184, 112-124 (2020-02-01)
    In eukaryotic cells, the genome is packaged into chromatin and exists in different states, ranging from open euchromatic regions to highly condensed heterochromatic regions. Chromatin states are highly dynamic and are organized by an interplay of histone post-translational modifications and
    Eunice F S Vieira et al.
    Biomacromolecules, 9(4), 1195-1199 (2008-03-19)
    Oxidized alginate (ADA) and oxidized alginate blended with chitosan (ADA-Chit) were prepared in the presence of borax and CaCl 2, and their interactions with an antifolate drug, pyrimethamine (PYR), have been investigated. Tablets with a mean diameter of 1.2 +/-
    Hasan Turkez
    Journal of applied toxicology : JAT, 28(5), 658-664 (2007-11-21)
    Titanium dioxide (TiO(2)) is a potential carcinogenic/mutagenic agent although it is used in many areas including medical industries and cosmetics. Boron (as boric acid and borax) has also well-described biological effects and therapeutic benefits. In a previous study, sister-chromatid exchanges
    Jian-Feng He et al.
    Journal of chromatography. A, 1218(24), 3816-3821 (2011-05-14)
    The paper presents an on-line transient moving chemical reaction boundary (MCRB) method for simply but efficiently stacking analytes in capillary electrophoresis (CE). The CE technique was developed for a rapid determination of fumaric and maleic acid. Based on the theory
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