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S9640

Sigma-Aldrich

Tetraborato de sodio decahydrate

ACS reagent, ≥99.5%

Sinónimos:

Borato de sodio decahydrate, Borax decahydrate

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About This Item

Fórmula lineal:
Na2B4O7 · 10H2O
Número de CAS:
1303-96-4
Peso molecular:
381.37
EC Number:
215-540-4
MDL number:
MFCD00149193
UNSPSC Code:
12352302
PubChem Substance ID:
329824630
NACRES:
NA.21

grade

ACS reagent

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%

cation traces

Ca: ≤0.005%
Fe: ≤5 ppm
heavy metals (as Pb): ≤0.001%

SMILES string

O.O.O.O.O.O.O.O.O.O.[Na+].[Na+].[O-]B1Ob2ob([O-])ob(O1)o2

InChI

1S/B4O7.2Na.10H2O/c5-1-7-3-9-2(6)10-4(8-1)11-3;;;;;;;;;;;;/h;;;10*1H2/q-2;2*+1;;;;;;;;;;

InChI key

CDMADVZSLOHIFP-UHFFFAOYSA-N

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General description

El decahidrato de tetraborato de sodio es un material natural utilizado como catalizador o aditivo para muchas transformaciones orgánicas como: reacción de Nef, condensación de Knoevenagel, sustitución, adición, metilación selectiva de dioles vecinales y desililación de trimetilsilil alquinonas.

Application

El decahidrato de tetraborato de sodio puede utilizarse como catalizador en
  • La tiólisis regioselectiva de 1,2-epóxidos utilizando tioles para sintetizar sulfuros β-hidroxi.
  • La heteroadición de Michael de tioles con olefinas con deficiencia de electrones para sintetizar los correspondientes β-aductos.
  • La reacción de Biginelli sin disolvente para sintetizar 3,4-dihidropirimidin-2(1H)-onas.
También se puede utilizar como aditivo para preparar compuestos de polipirrol-bórax con elevadas propiedades dieléctricas.

Legal Information

pictograms

Health hazardExclamation mark
GHS08,GHS07

signalword

Danger

Hazard Classifications

Eye Irrit. 2 - Repr. 1B

Storage Class

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

Certificados de análisis (COA)

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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
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
Qingzhou Cui et al.
The Analyst, 134(5), 875-880 (2009-04-22)
We developed a photonic crystal sensing method for diol containing species such as carbohydrates based on a poly(vinyl alcohol) (PVA) hydrogel containing an embedded crystalline colloidal array (CCA). The polymerized CCA (PCCA) diffracts visible light. We show that in the
C Cencetti et al.
Carbohydrate polymers, 90(3), 1362-1370 (2012-09-04)
Silver-loaded dressings are designed to provide the same antimicrobial activity of topical silver, with the advantages of a sustained silver release and a reduced number of dressing changes. Moreover, such type of dressing must provide a moist environment, avoiding fiber
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
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