MilliporeSigma
All Photos(2)

1.58793

Supelco

Sodium hydroxide solution 50%

for analysis EMSURE®

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

vapor pressure

2 hPa ( 20 °C)
3 mmHg ( 37 °C)

Quality Level

product line

EMSURE®

form

liquid

concentration

49.0-51.0% NaOH

impurities

≤0.0003% Total nitrogen (N)
≤0.0005% Al (Aluminium)
≤0.0005% Fe (Iron)
≤0.0005% Heavy metals (as Pb)
≤0.0005% Phosphate (PO4)
≤0.005% Silicate (SiO2)
≤0.005% Sulfate (SO4)
≤0.01% Chloride (Cl)
≤0.01% K (Potassium)

color

APHA: ≤10

pH

14 (20 °C, 89 g/L in H2O)

bp

135 °C/1013 hPa

mp

12 °C

density

1.52 g/cm3 at 20 °C

storage temp.

15-25°C

SMILES string

[OH-].[Na+]

InChI

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

InChI key

HEMHJVSKTPXQMS-UHFFFAOYSA-M

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1 of 4

This Item
1.113601.055871.05589
vapor pressure

2 hPa ( 20 °C), 3 mmHg ( 37 °C)

vapor pressure

3 mmHg ( 37 °C)

vapor pressure

3 mmHg ( 37 °C), 8 hPa ( 20 °C)

vapor pressure

3 mmHg ( 37 °C)

form

liquid

form

-

form

liquid

form

liquid

concentration

49.0-51.0% NaOH

concentration

45.0-50.0% NaOH

concentration

32.0-33.0% NaOH

concentration

-

impurities

≤0.0003% Total nitrogen (N), ≤0.0005% Al (Aluminium), ≤0.0005% Fe (Iron), ≤0.0005% Heavy metals (as Pb), ≤0.0005% Phosphate (PO4), ≤0.005% Silicate (SiO2), ≤0.005% Sulfate (SO4), ≤0.01% Chloride (Cl), ≤0.01% K (Potassium)

impurities

≤0.00001% Hg (Mercury), ≤0.0002% Al (Aluminium), ≤0.0005% Ca (Calcium), ≤0.0005% Mg (Magnesium), ≤0.005% Sulfate (SO4), ≤0.006% Chloride (Cl), ≤0.2% Carbonate (as Na2CO3)

impurities

≤0.0005% Heavy metals (as Pb), ≤0.0005% Phosphate (PO4), ≤0.001% Al (Aluminium), ≤0.001% Fe (Iron), ≤0.003% Sulfate (SO4), ≤0.004% Chloride (Cl), ≤0.005% Silicate (SiO2)

impurities

-

pH

14 (20 °C, 89 g/L in H2O)

pH

14 (20 °C, 89 g/L in H2O)

pH

14 (20 °C in H2O)

pH

14 (20 °C in H2O)

bp

135 °C/1013 hPa

bp

135 °C/1013 hPa

bp

-

bp

-

Analysis Note

Assay (acidimetric, as NaOH): 49.0 - 51.0 %
Carbonate (as Na₂CO₃): ≤ 0.2
Color (Hazen): ≤ 10 Hazen
Chloride (Cl): ≤ 0.01 %
Phosphate (PO₄): ≤ 0.0005 %
Silicate (SiO₂): ≤ 0.005 %
Sulfate (SO₄): ≤ 0.005 %
Total nitrogen (N): ≤ 0.0003 %
Heavy metals (as Pb): ≤ 0.0005 %
Al (Aluminium): ≤ 0.0005 %
Fe (Iron): ≤ 0.0005 %
K (Potassium): ≤ 0.01 %

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

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

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