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13142

Sigma-Aldrich

Magnesium sulfate heptahydrate

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

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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

vapor density

<0.01 (vs air)

Quality Level

vapor pressure

<0.1 mmHg ( 20 °C)

Assay

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

form

powder or crystals

quality

meets analytical specification of Ph. Eur., BP,USP, FCC

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)

loss

48.0-52.0% loss on drying, 450 °C

pH

5.0-9.2 (25 °C, 5%)

anion traces

chloride (Cl-): ≤150 mg/kg

cation traces

As: ≤2 ppm
Fe: ≤20 ppm
Pb: ≤4 ppm
Se: ≤30 ppm

suitability

complies for appearance of solution

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
6314063138M5921
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
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 BioXtra, &#8805;99.0%

Sigma-Aldrich

M5921

Magnesium sulfate heptahydrate

Premium Grade
assay

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

assay

≥99.0% (KT)

assay

≥99.5% (KT)

assay

≥99.0%

form

powder or crystals

form

powder or crystals

form

-

form

-

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)

impurities

≤0.005% insoluble matter

impurities

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

impurities

≤0.0005% Phosphorus (P), ≤0.005% Insoluble matter

pH

5.0-9.2 (25 °C, 5%)

pH

5.0-8.2 (25 °C, 50 mg/mL in H2O)

pH

5.0-8.0 (25 °C, 1 M in H2O)

pH

-

anion traces

chloride (Cl-): ≤150 mg/kg

anion traces

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

anion traces

chloride (Cl-): ≤5 mg/kg

anion traces

-

General description

Magnesium sulfate heptahydrate is the hydrated salt of magnesium. The spin-Hamiltonian parameters of the (Cu(H2O)6)2+ complex in magnesium sulfate heptahydrate have been determined by electron spin resonance (ESR) spectral studies. Raman spectra of 10 hydrated and anhydrous forms of magnesium sulfates have been reported. Their crystal structure and space groups have been evaluated by Raman and XRD (X-ray diffraction) studies.

Storage Class Code

13 - Non Combustible Solids

WGK

WGK 1

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable


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Sulfates on Mars: A systematic Raman spectroscopic study of hydration states of magnesium sulfates.
Wang A, et al.
Geochimica et Cosmochimica Acta, 70(24), 6118-6135 (2006)
ESR studies of (Cu(H2O)6)2+ in magnesium sulfate heptahydrate.
Radhakrishna S and Bhaskar Rao T.
Journal of Magnetic Resonance, 32(1), 71-81 (1978)
Ran D Goldman et al.
Pediatrics, 132(6), e1634-e1641 (2013-11-28)
Vaso-occlusive episodes (VOEs) are the most common complication of sickle cell disease in children. Treatment with magnesium seems to improve cellular hydration and may result in reduced vaso-occlusion. This study aimed to determine if intravenous (IV) magnesium sulfate (MgSO4) reduces
Feng Gao et al.
The Journal of surgical research, 184(2), 944-950 (2013-05-01)
Magnesium sulfate has been used as an anticonvulsant in severe preeclamptic or eclamptic women prior to surgical trauma, but its effects on neuroinflammation is not well defined. In the present study, we investigated the neuroprotective effects of magnesium sulfate in
Oluwakemi Badaki-Makun et al.
Pediatric blood & cancer, 61(6), 1049-1054 (2014-01-21)
Multiple recent Sickle Cell Disease studies have been terminated due to poor enrollment. We developed methods to overcome past barriers and utilized these to study the efficacy and safety of intravenous magnesium for vaso-occlusive crisis (VOC). We describe the methods

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