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S9640

Sodium tetraborate decahydrate

Name: Sodium tetraborate decahydrate
Brand: SIGALD

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

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 (PO₄^3-): ≤0.001%
sulfate (SO₄^2-): ≤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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Salts

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

GHS08,GHS07

Signal Word

Danger

Hazard Statements

H319,H360FD

Precautionary Statements

P202 - P264 - P280 - P305 + P351 + P338 - P308 + P313 - P337 + P313

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

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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