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B9876

Sigma-Aldrich

Sodium tetraborate decahydrate

ReagentPlus®, ≥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:
329773325
NACRES:
NA.21

agency

suitable for SM 4500 - NH3

Quality Level

200

product line

ReagentPlus®

assay

≥99.5%

form

powder

pH

9.2 (10 g/L)

density

1.73 g/mL at 25 °C (lit.)

storage temp.

room temp

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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Application

Sodium tetraborate decahydrate is widely used to prepare buffer solution with a pH range approx 9.3. It can also be used as:
  • A component of a buffer solution used in the separation and estimation of thiamin and its phosphate esters in commercial tablets.
  • A fluxing agent in the preparation of ceramizable silicone rubber-derived composite materials.
  • A crosslinking agent in the synthesis of porous foams by reacting cellulose nanofibres with poly-vinyl alcohol.

Legal Information

ReagentPlus is a registered trademark of Merck KGaA, Darmstadt, Germany

pictograms

Health hazardExclamation mark
GHS08,GHS07

signalword

Danger

Hazard Classifications

Eye Irrit. 2 - Repr. 1B

wgk_germany

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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di-Sodium tetraborate decahydrate certified secondary standard reference material for pH measurement; directly traceable to primary SRM from NIST/PTB pH(S)=9.18₀ (25°C) Certipur®

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1.01964

di-Sodium tetraborate decahydrate

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di-Sodium tetraborate decahydrate

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Sigma-Aldrich

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Separation of thiamin and its phosphate esters by capillary zone electrophoresis and its application to the analysis of water-soluble vitamins
Shabangi M and Sutton JA
Journal of Pharmaceutical and Biomedical Analysis, 38, 66-71 (2005)
Structural packaging foams prepared by uni-directional freezing of paper sludge cellulose nanofibres and poly (vinyl alcohol)
Adu C, et al.
Materials Letters, 253, 242-245 (2019)
Improving the mechanical and electrical properties of ceramizable silicone rubber/halloysite composites and their ceramic residues by incorporation of different borates
Guo J, et al.
Polymers, 10, 388-388 (2018)
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
Uttam Manna et al.
The journal of physical chemistry. B, 113(27), 9137-9142 (2009-06-18)
We report a multilayer film of poly(vinyl alcohol) (PVA)-borate complex and chitosan by using a layer-by-layer approach. PVA is an uncharged polymer, but hydroxyl functional groups of PVA can be cross-linked by using borax as a cross-linking agent. As a
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