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63140

Sigma-Aldrich

Magnesium sulfate heptahydrate

puriss. p.a., ACS reagent, ≥99.0% (KT)

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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:
NB.24

grade

ACS reagent
puriss. p.a.

Quality Level

vapor density

<0.01 (vs air)

vapor pressure

<0.1 mmHg ( 20 °C)

Assay

≥99.0% (KT)

form

powder or crystals

impurities

≤0.005% insoluble matter

pH

5.0-8.2 (25 °C, 50 mg/mL in H2O)

anion traces

chloride (Cl-): ≤5 mg/kg
nitrate (NO3-): ≤20 mg/kg

cation traces

As: ≤0.1 mg/kg
Ca: ≤10 mg/kg
Cd: ≤5 mg/kg
Co: ≤5 mg/kg
Cr: ≤5 mg/kg
Cu: ≤5 mg/kg
Fe: ≤1 mg/kg
K: ≤10 mg/kg
Mn: ≤5 mg/kg
NH4+: ≤20 mg/kg
Na: ≤10 mg/kg
Ni: ≤5 mg/kg
Pb: ≤5 mg/kg
Sr: ≤5 mg/kg
Zn: ≤5 mg/kg
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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1 of 4

This Item
M18806313813142
Magnesium sulfate heptahydrate puriss. p.a., ACS reagent, &#8805;99.0% (KT)

Sigma-Aldrich

63140

Magnesium sulfate heptahydrate

Essential Grade
Magnesium sulfate heptahydrate BioUltra, &#8805;99.5% (KT)

Sigma-Aldrich

63138

Magnesium sulfate heptahydrate

Premium Grade
Magnesium sulfate heptahydrate 99.5-100.5% (calc. to the dried substance), meets analytical specification of Ph. Eur., BP,USP, FCC

Sigma-Aldrich

13142

Magnesium sulfate heptahydrate

Essential 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)

assay

≥99.0% (KT)

assay

≥99.0%

assay

≥99.5% (KT)

assay

99.5-100.5% (calc. to the dried substance)

form

powder or crystals

form

powder or crystals

form

-

form

powder or crystals

impurities

≤0.005% insoluble matter

impurities

-

impurities

insoluble matter, passes filter test, ≤0.002% total nitrogen (N)

impurities

acidity or alkalinity, in accordance, organic volatile impurities, complies (GC), residual solvents, complies, ≤0.001 ppm heavy metals (as Pb), ≤0.004% free alkali (as MgO), ≤0.01% free acid (as H2SO4)

pH

5.0-8.2 (25 °C, 50 mg/mL in H2O)

pH

5-8 (50 g/L)

pH

5.0-8.0 (25 °C, 1 M in H2O)

pH

5.0-9.2 (25 °C, 5%)

Application

Magnesium sulfate heptahydrate can be used as a catalyst to synthesize tri/tetra-substituted imidazoles via a one-pot condensation reaction of aromatic aldehydes, benzil, aliphatic and aromatic primary amines, and ammonium acetate. It is also used to synthesize phenazine and quinoxaline derivatives.

Storage Class Code

13 - Non Combustible Solids

WGK

WGK 1

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable


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