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1.05593 Supelco

Sodium hydroxide solution 21%

for analysis EMSURE®

Synonym: Sodium hydroxide solution

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Properties

Quality Level   300
vapor pressure   3 mmHg ( 37 °C)
pH   >11 (20 °C in H2O)
density   1.219 g/cm3 at 20 °C
SMILES string   [OH-].[Na+]
InChI   1S/Na.H2O/h;1H2/q+1;/p-1
InChI key   HEMHJVSKTPXQMS-UHFFFAOYSA-M
storage conditions   Store at +5°C to +30°C.

Description

Analysis Note

Assay (acidimetric): 19.0 - 21.8 %
Carbonate (as Na₂CO₃): ≤ 0.2 %
Chloride (Cl): ≤ 0.005 %
Sulfate (SO₄): ≤ 0.005 %
Heavy metals (as Pb): ≤ 0.002 %
Fe (Iron): ≤ 0.001 %

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

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