Chemicals

Top

General Information

Magnesium Sulfate

Magnesium sulfate is also called milk of magnesia or English salt and it is the natural salt of magnesium and sulfate. The heptahydrate is commonly reffered to as Epsom salt. It is won from a reaction between sulphuric acid and a magnesium salt. The anhydrous form is very hygroscopic and used as a drying agent.[1]

Top

Chemical & Physical Information

Trivial nameMagnesium sulfate
Chemical nameMagnesium sulfate, heptahydrate
Other namesEpsom salt (EN), magnesium sulfaat (NL,BE)
Type of chemicalIonic compound (salt)
Chemical formulaMgSO4, 7H2O
CAS number1330-43-4 (anhydrous)
1303-96-4 (decahydrate)
Density1.68 g·cm-3
Molar mass246.47 g·mol-1
Melting point1124 °C with decomposition
Boiling pointn/a
SolubleIn water
Solubility (water, 20 °C)335 g·L-1 Magnesium sulfate solubility graph. (anhydrous)
Crystal systemMonoclinic
AppearanceWhite crystalline solid
ColourWhite
Safety summarySafe
Safety dataMSDS
StorageDry
Extra-
Top

Photos

Magnesium Sulfate

(3 cm)

Top

Sources

[1] Wikipedia

[2] Specimen from my personal collection, photo taken by me.

[3] Mullin J.W. - Crystallization, 2001