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1.05866

Supelco

Magnesium oxide

for analysis (max.0.001% SO₄) EMSURE® ACS

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

grade

ACS reagent

assay

≥97% (complexometric)

form

solid

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%
chloride (Cl-): ≤0.01%
nitrate (NO3-): ≤0.005%
sulfate (SO42-): ≤0.001%
sulfate, sulfite (as SO42-): ≤0.02%

cation traces

As: ≤ 0.0001%
Ba + Sr (as Ba): ≤ 0.005%
Ca: ≤ 0.05%
Cu: ≤ 0.001%
Fe: ≤ 0.005%
K: ≤ 0.005%
Mn: ≤ 0.0005%
N: ≤ 0.002%
Na: ≤ 0.25%
Pb: ≤ 0.001%
Zn: ≤ 0.0005%
heavy metals (as Pb): ≤ 0.003%

storage temp.

no temp limit

InChI

1S/Mg.O

InChI key

CPLXHLVBOLITMK-UHFFFAOYSA-N

Related Categories

Analysis Note

Identity: passes test
Assay (complexometric): ≥ 97 %
Appearance of solution: passes test
Substances soluble in water: ≤ 0.4 %
Substances insoluble in hydrochloric acid: ≤ 0.02 %
Substances precipitated by ammonia: ≤ 0.02 %
Carbonate (as CO₂): ≤ 1.5 %
Chloride (Cl): ≤ 0.01 %
Nitrate (NO₃): ≤ 0.005 %
Sulfate (SO₄): ≤ 0.001 %
Sulfate and sulphite (as SO₄): ≤ 0.02 %
Total nitrogen (N): ≤ 0.002 %
Heavy metals (as Pb): ≤ 0.003 %
As (Arsenic): ≤ 0.0001 %
Ca (Calcium): ≤ 0.05 %
Cu (Copper): ≤ 0.001 %
Fe (Iron): ≤ 0.005 %
K (Potassium): ≤ 0.005 %
Mn (Manganese): ≤ 0.0005 %
Na (Sodium): ≤ 0.25 %
Pb (Lead): ≤ 0.001 %
Zn (Zinc): ≤ 0.0005 %
Barium and Strontium (as Ba): ≤ 0.005 %
Loss on ignition (1000 °C): ≤ 2.0 %
Conforms to ACS

Legal Information

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

Storage Class Code

11 - Combustible Solids

WGK Germany

WGK 1

Flash Point F

Not applicable

Flash Point C

Not applicable

Certificate of Analysis

Certificate of Origin

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