230391

Magnesium sulfate heptahydrate

ACS reagent, ≥98%

• 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: 12352302
• eCl@ss: 38030409
• PubChem Substance ID: 329752370
• NACRES: NA.21

Properties

• 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

Description

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.

Safety Information

• Storage Class Code: 13 - Non Combustible Solids
• WGK: WGK 1
• Flash Point(F): Not applicable
• Flash Point(C): Not applicable