Merck
All Photos(1)

1.05865

Supelco

Magnesium oxide

for analysis EMSURE®

Synonym(s):
Magnesia usta, Magnesium oxide
Empirical Formula (Hill Notation):
MgO
CAS Number:
Molecular Weight:
40.30
MDL number:
EC Index Number:
215-171-9

Quality Level

product line

EMSURE®

assay

≥97% (complexometric)

form

solid

impurities

≤0.1% Substances insoluble in hydrochloric acid
≤0.5% Substances soluble in water

loss

≤3% loss on ignition, 1000 °C

pH

10.3 (20 °C in H2O, saturated solution)

bp

3600 °C/1000 hPa

mp

2800 °C

density

3.58 g/cm3 at 25 °C

bulk density

100 kg/m3

anion traces

carbonate (CO32-): ≤1.5% (as CO2)
chloride (Cl-): ≤0.01%
sulfate (SO42-): ≤0.02%

cation traces

Ba + Sr (as Ba): ≤0.005%
Ca: ≤0.10%
Cu: ≤0.001%
Fe: ≤0.005%
K: ≤0.005%
Na: ≤0.30%
Pb: ≤0.001%
Zn: ≤0.0005%

storage temp.

no temp limit

InChI

1S/Mg.O

InChI key

CPLXHLVBOLITMK-UHFFFAOYSA-N

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Analysis Note

Assay (complexometric): ≥ 97 %
Substances soluble in water: ≤ 0.5 %
Substances insoluble in hydrochloric acid: ≤ 0.10 %
Carbonate (as CO₂): ≤ 1.5 %
Chloride (Cl): ≤ 0.01 %
Sulfate (SO₄): ≤ 0.02 %
Total nitrogen (N): ≤ 0.002 %
Ca (Calcium): ≤ 0.10 %
Cu (Copper): ≤ 0.001 %
Fe (Iron): ≤ 0.005 %
K (Potassium): ≤ 0.005 %
Na (Sodium): ≤ 0.30 %
Pb (Lead): ≤ 0.001 %
Zn (Zinc): ≤ 0.0005 %
Barium and Strontium (as Ba): ≤ 0.005 %
Loss on ignition (1000 °C): ≤ 3.0 %

Legal Information

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

Storage Class Code

13 - Non Combustible Solids

WGK

WGK 1

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

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