Skip to Content
Merck

Key Documents

View All Documentation

1.06310

di-Sodium tetraborate

for analysis (ca. 85% Na2B4O7)

Synonym(s):

di-Sodium tetraborate, Borax

Sign In to View Organizational & Contract Pricing.

Select a Size

Change View

About This Item

Empirical Formula (Hill Notation):
B4Na2O7 · nH2O (n=1.5-2)
CAS Number:
12267-73-1
MDL number:
MFCD00003193
NACRES:
NA.21
EC Index Number:
215-540-4
UNSPSC Code:
12352302
Assay:
≥85.0% (acidimetric)
Form:
solid
Solubility:
water: Ca. 25  g/L at 20 °C (68 °F)
Technical Service
Need help? Our team of experienced scientists is here for you.
Let Us Assist

vapor pressure

20-°C ( 68 °F)

Quality Segment

100

assay

≥85.0% (acidimetric)

form

solid

pH

9-10 (20 °C, 25 g/L in H2O)

bp

1575 °C/1013 hPa (anhydrous)

mp

742 °C (anhydrous)

solubility

water: Ca. 25  g/L at 20 °C (68 °F)

density

2.35 g/cm3 at 26 °C

bulk density

680 kg/m3

anion traces

chloride (Cl-): ≤0.002%, phosphate (PO43-): ≤0.002%, sulfate (SO42-): ≤0.01%

cation traces

Ca: ≤0.01%, Fe: ≤0.001%, heavy metals (as Pb): ≤0.002%

storage temp.

2-30°C

Application


  • Micellar electrokinetic chromatography for separation of a mixture of coptis alkaloids, scute flavonoids, and rhubarb anthraquinones and bianthrones.: This study by Chang and Sun investigates the use of micellar electrokinetic chromatography (MEKC) to separate complex mixtures of bioactive compounds. The research highlights the effectiveness of di-Sodium tetraborate in optimizing the separation process, showcasing its utility in analytical chemistry for the precise analysis of natural products (Chang et al., 2006).

Analysis Note

Assay (acidimetric): ≥ 85.0 %
Chloride (Cl): ≤ 0.002 %
Phosphate (PO₄): ≤ 0.002 %
Sulfate (SO₄): ≤ 0.01 %
Heavy metals (as Pb): ≤ 0.002 %
Ca (Calcium): ≤ 0.01 %
Fe (Iron): ≤ 0.001 %

signalword

Danger

Hazard Classifications

Eye Irrit. 2 - Repr. 1B

wgk

WGK 1

flash_point_f

Not applicable

flash_point_c

Not applicable

pictograms

Health hazardExclamation mark
GHS08,GHS07

Storage Class

6.1D - Non-combustible acute toxic Cat.3 / toxic hazardous materials or hazardous materials causing chronic effects

Regulatory Listings

Regulatory Listings are mainly provided for chemical products. Only limited information can be provided here for non-chemical products. No entry means none of the components are listed. It is the user’s obligation to ensure the safe and legal use of the product.

Substances Subject to be Indicated Names

ishl_indicated

Substances Subject to be Notified Names

ishl_notified

Class I Designated Chemical Substances

prtr

Choose from one of the most recent versions:

Certificates of Analysis (COA)

Lot/Batch Number

Don't see the Right Version?

If you require a particular version, you can look up a specific certificate by the Lot or Batch number.

Search for a COA

Already Own This Product?

Find documentation for the products that you have recently purchased in the Document Library.

Visit the Document Library