Magnesite Powder Description
Magnesite occurs naturally, often in association with iron, manganese or other activating elements. It forms as ultramafic rock is altered under the influence of carbonated water. Several large deposits exist globally.
Chemical Designation: Magnesium carbonate
Chemical Formula: MgCO3
Synonyms:
Magnesite powder, (MgCO3), Magnesite, Magnesium carbonate, dead‐burnt magnesite, calcined magnesite, carbonic acid, magnesium salt, carbonate magnesium, hydromagnesite, Magnesium carbonate, Magnesium(II)-carbonate, CAS# 1309-48-4, 12440-90-3, 13717-00-5, 1784-39-0, 183480-27-5, 546-93-0, 68973-26-2, 7757-69-9, AI3-00768, Apolda, Australischer Magnesite, C.I. 77713, Magnesium salt (xMg), Caswell Nr. 530, CHEBI:31793, CI 77713, DCI light magnesium carbonate, Destab, EINECS 208-915-9, EINECS 231-817-2, EPA Pesticide Chemical Code 073503, Giobertite, Gold Star (Carbonat), GP 20 (Carbonat), HSDB 211, Hydromagnesite, Kimboshi, LS-181780, MA 70 (Carbonat), Magfy, Magmaster, Magnesite (Mg(CO3)), Magnesite dust, anhydrous magnesium carbonate, anhydrous magnesium carbonate [USAN], MAGNESIUM CARBONATE DIHYDRATE, Magnesium(II)carbonate (1:1), Magnesium carbonate, MgCO3, NSC 83511, Stan-mag-Magnesium carbonate

Chemical Properties
Dead‐burnt and calcined
Physical Properties
5 x 20 mesh, 12 mesh, 60 mesh, 100 mesh and 325 mesh USS

Typical Applications of Magnesite Powder
This ore is used as a source of magnesium and its salts. It is employed in the manufacture of refractory materials that withstand extremely high temperatures and is used in the production of specialised cement types and powders for the paper, rubber and pharmaceutical industries.
Packaging of Magnesite Powder
Jars, buckets, barrels, paper bags, bulk bags and cardboard containers. For further information regarding packaging options, please contact SAM.
Specifications of Magnesite Powder
Molecular Weight (g/mol)
|
40.32
|
RTECS
|
OM2470000
|
Bulk Density (g/cm³)
|
3.1 to 3.4
|
MLT (°F) (decomposes)
|
662
|
Fracture
|
brittle – shell-like
|
Surface Area (m²/g)
|
20
|
Colour
|
white
|
Mohs Hardness (@20°C)
|
~3.5 – 5.0
|
Specific Gravity (g/cc)
|
3.5
|
Particle Shape
|
irregular
|
Melting Point
|
non-meltable
|
Crystal System
|
trigonal
|
Magnesite Powder (MgCO3) CAS Number:
Calcined Magnesite = CAS No. 1309-48-4
Dead‐burnt Magnesite = CAS No. 1309-48-4
Magnesite Powder (MgCO3) RTECS Number: OM2470000
Magnesite Powder (MgCO3) ICSC Number: 0969