1.06310

di-Sodium tetraborate

for analysis (ca. 85% Na₂B₄O₇)

• Synonym(s): di-Sodium tetraborate, Borax
• 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)

Properties

• 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 (PO₄^3-): ≤0.002%, sulfate (SO₄^2-): ≤0.01%
• cation traces: Ca: ≤0.01%, Fe: ≤0.001%, heavy metals (as Pb): ≤0.002%
• storage temp.: 2-30°C

Description

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 %

Safety Information

• pictograms: GHS07,GHS08
• signalword: Danger
• hcodes: H319 - H360FD
• pcodes: P202 - P264 - P280 - P305 + P351 + P338 - P308 + P313 - P337 + P313
• 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: WGK 1
• flash_point_f: Not applicable
• flash_point_c: Not applicable