Magnesium oxide

Description	Magnesium oxide (MgO), or magnesia, is a white hygroscopic solid mineral that occurs naturally as periclase and is a source of magnesium (see also oxide). It has an empirical formula of MgO and consists of a lattice of Mg2+ ions and O2− ions held together by ionic bonding. Magnesium hydroxide forms in the presence of water (MgO + H₂O → Mg(OH)2), but it can be reversed by heating it to separate moisture.Magnesium oxide was historically known as magnesia alba (literally, the white mineral from magnesia – other sources give magnesia alba as MgCO3), to differentiate it from magnesia negra, a black mineral containing what is now known as manganese.While “magnesium oxide” normally refers to MgO, magnesium peroxide MgO2 is also known as a compound. According to evolutionary crystal structure prediction, MgO2 is thermodynamically stable at pressures above 116 GPa (gigapascals), and a totally new semiconducting suboxide Mg3O2 is thermodynamically stable above 500 GPa. Because of its stability, MgO is used as a model system for investigating vibrational properties of crystals.
IUPAC Name	oxomagnesium
Molecular Weight	40.30
Molecular Formula	MgO
Canonical SMILES	O=[Mg]
InChI	1S/Mg.O
InChI Key	CPLXHLVBOLITMK-UHFFFAOYSA-N
Boiling Point	3600 c
Melting Point	2852ºC
Flash Point	3600ºC
Purity	0.995
Density	3.58
Solubility	dil. acids, ammonium salt solns.
Appearance	White or light grey powder
Application	Intermediates, Antacid, Catalyst, Drilling Fluid Additives, Flame Retardant, Chemical Intermediate , Breaker
Storage	Magnesium oxide is stable at normal temperatures and pressures. However, it forms magnesium hydroxide in the presence of water. Magnesium oxide is hygroscopic and rapidly absorbs water and carbon dioxide on exposure to the air, the light form more readily than the heavy form. The bulk material should be stored in an airtight container in a cool, dry place.Storage temperature: no restrictions.
Assay	≥99.9% trace metals basis
Dimension	10 mm × 10 mm × 0.5 mm
EC Number	215-171-9
Fluorescence	1S/Mg.O
Form	(single crystal substrate)
Impurity Content	<10 ppm C
MDL Number	MFCD00011109
Packaging	1 ea in rigid mailer
Quality Level	100
Refractive Index	1.736
Semiconductor Properties	<100>