MilliporeSigma
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1.05886

Supelco

Magnesium sulfate heptahydrate

for analysis EMSURE® ACS,Reag. Ph Eur

Synonym(s):
bitter salt, epsom salt, sulfuric acid magnesium salt heptahydrate, Epsom salts
Linear Formula:
MgSO4 · 7H2O
CAS Number:
Molecular Weight:
246.47
MDL number:
EC Index Number:
231-298-2

Quality Level

grade

ACS reagent

Agency

reag. Ph. Eur.

vapor density

<0.01 (vs air)

vapor pressure

<0.1 mmHg ( 20 °C)

product line

EMSURE®

assay

≥99.5% (complexometric)
99.0-100.5% dry basis (complexometric)

form

solid

impurities

≤0.005% Insoluble matter

loss

48.0-52.0% loss on drying, 400 °C

pH

5.0-8.0 (25 °C, 50 g/L in H2O)

solubility

710 g/L

density

1.68 g/cm3 at 20 °C

bulk density

900 kg/m3

anion traces

chloride (Cl-): ≤0.0003%
nitrate (NO3-): ≤0.002%

cation traces

As: ≤0.0002%
Ca: ≤0.005%
Cu: ≤0.0001%
Fe: ≤0.0001%
K: ≤0.001%
Mn: ≤0.0005%
N: ≤0.002%
NH4+: ≤0.002%
Na: ≤0.001%
Pb: ≤0.0001%
Sr: ≤0.005%
heavy metals: ≤0.0005%

storage temp.

2-30°C

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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Analysis Note

Assay (complexometric): ≥ 99.5 %
Assay (complexometric; calculated on dried substance): 99.0 - 100.5 %
Identity: passes test
Appearance of solution: passes test
Insoluble matter: ≤ 0.005 %
Acidity or alkalinity: passes test
pH-value (5 %; water; 25 °C): 5.0 - 8.0
Chloride (Cl): ≤ 0.0003 %
Total nitrogen (N): ≤ 0.002 %
Nitrate (NO₃): ≤ 0.002 %
Heavy metals (ACS): ≤ 0.0005 %
As (Arsenic): ≤ 0.0002 %
Ca (Calcium): ≤ 0.005 %
Cu (Copper): ≤ 0.0001 %
Fe (Iron): ≤ 0.0001 %
K (Potassium): ≤ 0.001 %
Mn (Manganese): ≤ 0.0005 %
Na (Sodium): ≤ 0.001 %
NH₄ (Ammonium): ≤ 0.002 %
Pb (Lead): ≤ 0.0001 %
Sr (Strontium): ≤ 0.005 %
Loss on drying (400 °C): 48.0 - 52.0 %
Corresponds to ACS, Reag. Ph Eur

Legal Information

EMSURE is a registered trademark of Merck KGaA, Darmstadt, Germany

Storage Class Code

13 - Non Combustible Solids

WGK

WGK 1

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Certificate of Analysis

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Certificate of Quality

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