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Sigma-Aldrich

Magnesium sulfate heptahydrate

ACS reagent, ≥98%

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Synonym(s):
Epsom salts
Linear Formula:
MgSO4 · 7H2O
CAS Number:
10034-99-8
Molecular Weight:
246.47
EC Number:
231-298-2
MDL number:
MFCD00149785
UNSPSC Code:
12352300
eCl@ss:
38030409
PubChem Substance ID:
329752370
NACRES:
NA.21

grade

ACS reagent

Quality Level

200

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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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.

WGK

WGK 1

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Certificates of Analysis (COA)

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