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Sigma-Aldrich

Sodium tetraborate decahydrate

puriss., meets analytical specification of Ph. Eur., BP, NF, 99.0-103.0%

Synonym(s):

Borax decahydrate, Sodium borate decahydrate

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About This Item

Linear Formula:
Na2B4O7 · 10H2O
CAS Number:
Molecular Weight:
381.37
EC Number:
MDL number:
UNSPSC Code:
12352302
PubChem Substance ID:
NACRES:
NA.22

Agency

Ph. Eur.

grade

puriss.

Assay

99.0-103.0%

form

crystalline

quality

meets analytical specification of Ph. Eur., BP, NF

impurities

carbonate and Bicarbonate, complies
organic volatile impurities, complies
residual solvents, complies
≤0.001% ammonium (NH4)
≤0.002% heavy metals (as Pb)

pH

9.0-9.6 (20 °C, 5%)

density

1.73 g/mL at 25 °C (lit.)

anion traces

chloride (Cl-): ≤50 mg/kg
sulfate (SO42-): ≤50 mg/kg

cation traces

As: ≤3 mg/kg
Ca: ≤100 mg/kg
Fe: ≤20 mg/kg
Mg: ≤10 mg/kg

suitability

complies for appearance of solution

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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Legal Information

Pictograms

Health hazardExclamation mark

Signal Word

Danger

Hazard Statements

Hazard Classifications

Eye Irrit. 2 - Repr. 1B

Storage Class Code

6.1C - Combustible acute toxic Cat.3 / toxic compounds or compounds which causing chronic effects

WGK

WGK 1

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable


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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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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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The journal of physical chemistry. B, 114(41), 13059-13068 (2010-09-25)
Guar gum is a galactomannan that assumes a very flexible conformation in solution, while Scleroglucan is a very rigid polysaccharide that dissolves in water as triple helices. Both polymers can form gels in the presence of borax. Despite their structural
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

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