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B9876

Sigma-Aldrich

Sodium tetraborate decahydrate

ReagentPlus®, ≥99.5%

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Synonym(s):
Borax decahydrate, Sodium borate decahydrate
Linear Formula:
Na2B4O7 · 10H2O
CAS Number:
Molecular Weight:
381.37
EC Number:
MDL number:
PubChem Substance ID:
NACRES:
NA.21

agency

suitable for SM 4500 - NH3

Quality Level

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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This Item
3145711625S9640
vibrant-m

B9876

Sodium tetraborate decahydrate

-
vibrant-m

31457

Sodium tetraborate decahydrate

Essential Grade
vibrant-m

11625

Sodium tetraborate decahydrate

Essential Grade
vibrant-m

S9640

Sodium tetraborate decahydrate

-
form

powder

form

powder or crystals

form

crystalline

form

powder or crystals

assay

≥99.5%

assay

≥99.5%

assay

99.0-103.0%

assay

≥99.5%

density

1.73 g/mL at 25 °C (lit.)

density

1.73 g/mL at 25 °C (lit.)

density

1.73 g/mL at 25 °C (lit.)

density

1.73 g/mL at 25 °C (lit.)

pH

9.2 (10 g/L)

pH

9.0-9.6 (20 °C, 5%)

pH

9.0-9.6 (20 °C, 5%)

pH

9.15-9.20 (25 °C, 0.01 M in solution)

agency

suitable for SM 4500 - NH3

agency

reag. ISO

agency

Ph. Eur.

agency

suitable for SM 4500 - NH3

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

Exclamation markHealth hazard

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


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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)
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)
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)
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

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