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1.05593

Supelco

Sodium hydroxide solution 21%

for analysis EMSURE®

Synonym(s):
Sodium hydroxide solution
Linear Formula:
NaOH
CAS Number:
Molecular Weight:
40.00
MDL number:

Quality Level

vapor pressure

3 mmHg ( 37 °C)

concentration

19.0-21.8% NaOH

impurities

≤0.001% Fe (Iron)
≤0.002% Heavy metals (as Pb)
≤0.005% Chloride (Cl)
≤0.005% Sulfate (SO4)
≤0.2% Carbonate (as Na2CO3)

pH

>11 (20 °C in H2O)

density

1.219 g/cm3 at 20 °C

storage temp.

2-30°C

SMILES string

[OH-].[Na+]

InChI

1S/Na.H2O/h;1H2/q+1;/p-1

InChI key

HEMHJVSKTPXQMS-UHFFFAOYSA-M

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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 %

Legal Information

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

Pictograms

Corrosion

Signal Word

Danger

Hazard Statements

Hazard Classifications

Eye Dam. 1 - Met. Corr. 1 - Skin Corr. 1A

Storage Class Code

8B - Non-combustible, corrosive hazardous materials

WGK

WGK 1

Certificate of Analysis

Certificate of Origin

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