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230391

Sigma-Aldrich

Magnesium sulfate heptahydrate

ACS reagent, ≥98%

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Synonym(s):
Epsom salts
Linear Formula:
MgSO4 · 7H2O
CAS Number:
Molecular Weight:
246.47
EC Number:
MDL number:
eCl@ss:
38030409
PubChem Substance ID:
NACRES:
NA.21

grade

ACS reagent

Quality Level

vapor density

<0.01 (vs air)

vapor pressure

<0.1 mmHg ( 20 °C)

assay

≥98%
98.0-102.0% (ACS specification)

form

crystals

impurities

≤0.005% insolubles

pH

5.0-8.2 (25 °C, 5%)

anion traces

chloride (Cl-): ≤5 ppm
nitrate (NO3-): ≤0.002%

cation traces

Ca: ≤0.02%
Fe: ≤5 ppm
K: ≤0.005%
Mn: ≤5 ppm
NH4+: ≤0.002%
Na: ≤0.005%
Sr: ≤0.005%
heavy metals: ≤5 ppm (by ICP-OES)

SMILES string

O.O.O.O.O.O.O.[Mg++].[O-]S([O-])(=O)=O

InChI

1S/Mg.H2O4S.7H2O/c;1-5(2,3)4;;;;;;;/h;(H2,1,2,3,4);7*1H2/q+2;;;;;;;;/p-2

InChI key

WRUGWIBCXHJTDG-UHFFFAOYSA-L

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This Item
M1880M2773M5921
Magnesium sulfate heptahydrate ACS reagent, &#8805;98%

230391

Magnesium sulfate heptahydrate

Essential Grade
Magnesium sulfate heptahydrate ReagentPlus&#174;, &#8805;99.0%

M1880

Magnesium sulfate heptahydrate

-
Magnesium sulfate heptahydrate BioReagent, for molecular biology, suitable for plant cell culture, &#8805;99.0%

M2773

Magnesium sulfate heptahydrate

Essential+ Grade
Magnesium sulfate heptahydrate BioXtra, &#8805;99.0%

M5921

Magnesium sulfate heptahydrate

Premium Grade
assay

≥98%, 98.0-102.0% (ACS specification)

assay

≥99.0%

assay

≥99.0%

assay

≥99.0%

Quality Level

200

Quality Level

200

Quality Level

-

Quality Level

200

grade

ACS reagent

grade

-

grade

for molecular biology

grade

-

vapor pressure

<0.1 mmHg ( 20 °C)

vapor pressure

<0.1 mmHg ( 20 °C)

vapor pressure

<0.1 mmHg ( 20 °C)

vapor pressure

<0.1 mmHg ( 20 °C)

pH

5.0-8.2 (25 °C, 5%)

pH

5-8 (50 g/L)

pH

-

pH

-

General description

Magnesium sulfate heptahydrate is a hydrated salt of magnesium. It is commonly used as a catalyst in organic synthesis.

Application

Magnesium sulfate heptahydrate can be used as a Lewis acid catalyst to synthesize:      
  • Phenazine and quinoxaline derivatives via a condensation reaction between o-phenylenediamines and 1,2-dicarbonyl compounds.
  • Imidazole derivatives via one-pot multicomponent condensation reaction of aromatic aldehydes, benzil, aliphatic, and aromatic primary amines.

NaBH4 supported on MgSO4 7H2O can be used as an efficient catalyst for the reduction of α, β-unsaturated carbonyl compounds to corresponding alcohols.

Storage Class

13 - Non Combustible Solids

wgk_germany

WGK 1

flash_point_f

Not applicable

flash_point_c

Not applicable


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