Magnesium oxide

Magnesium oxide (MgO);Magnesium oxide;Calcined magnesia;Magcal;Maglite;Magnesia;Magnesia usta;Magnesium monoxide;Maglite D;Magnesa Preprata;Maglite S;Maglite Y;Kyowamag 100;KM 40;Maglite K;Anscor P;Maglite DE;Marmag;Elastomag 100;Elastomag 170;SLO 469;SLO 369;Animag;Caustic magnesite;MM 469;Kyowamag 30;Magox;Kyowamag 150;Liquimag A;Liquimag B;Magnesia (MgO);HP 10;Kyowamag 40;U 180P;Mag Chem 10-200;Kyowaad 100;Maglite CG 1;Kyowamag 150B;Magnesium(II) oxide;T 22 (oxide);T 22;Mag Chem 10-40;Mag Chem 50;Causmag;FloMag HP;FloMag HP-ER;KM 3 (oxide);KM 3;Luvatol MK 35;HP 10 (oxide);Micromag;Kyowamag 20;Pyrokisuma 530;HP 30 (oxide);HP 30;Fert-O-Mag;Micromag 3-150;Kyowamag 60;AM 2 (cement additive);AM 2;Zabotan Mg;Insulmag 4;Pyrokisuma 3320;Magnesia 100A;Magnesia 500A;Pyrokisuma 5301;Magmic;MG 15;Mag Chem 50Y;Mag Chem 200D;Mag Chem P 98;Pyrokisuma 3320K;Micromag 3-30;KMAOH-F;SSP 3;HP 10N;Micromag 150;UBE 995S;Ube Green;PG 9033;995S;Magmic 4;100A;100A (oxide);Mag Chem 35;MagOx 98HR;MagOx 93HR;Mag Chem 10;BayMag;MJ 30;1000A;FMR-PC;Hamag LP;Pyrokisuma 5301K;Magsarat 150ST;500A;Mag Chem 10-325;UC 95H;MagOx 98HR-STI;Mag Chem 50M;Mag Chem 200AD;Ube 100A;Scorchguard O;Nanotek MgO;Kyowaway 150;KMB 100-200;Starmag M;SSP 1;Pyrokisuma 3310S;Kyowamag 150C;H 10;H 10 (oxide);Tomex AD 100;Luvatol EK 100KM;KMAO-H;Pyrokisuma 5201;DAB 6;DAB 6 (oxide);Starmag SL;Magnesia 312;Tomita AD 100P;AD 100P;SL;RSG;13589-16-7;52933-73-0;82375-77-7;185461-91-0;187036-80-2;227961-49-1;1193320-89-6;2408628-73-7

1309-48-4

MgO

InChIKey=CPLXHLVBOLITMK-UHFFFAOYSA-N

40.30440

39.98000

215-171-9

0504

DTXSID9049665

White, very fine powder|White powder, either light or heavy depending upon whether it is prepared by heating magnesium carbonate or the basic magnesium carbonate|Colorless, transparent cubic crystals

25199010

Acidity Regulators

17.07000

-0.11880

Magnesium oxide appears as a white solid, often found as a powder. When fine particles of magnesium oxide are dispersed in air, whether directly or when generated by the burning or cutting of magnesium metal, the resulting magnesium oxide fume is an inhalation hazard.

3.58 g/cm³

2800 °C

3600 °C

3600ºC

1.736

H2O: 5 M HCl: 0.1 M at 20 °C, clear, colorless | 6.2 mg/L (20 ºC), reacts

Store in a cool, dry place. Keep away from water. Keep containers tightly closed.

0 mmHg (approx)

Noncombustible Solid

Odorless

pH = 10.3 (saturated aqueous solution)

Takes up carbon dioxide and water from air, light form more readily than heavy; combines with water to form magnesium hydroxide; imparts a slight alkaline reaction to water|Moisture sensitive /hygroscopic/|Specific heat: 0.92885 kJ/kg-K at 27 °C; heat of fusion: 77.4 kJ/mol at 2642 °C; heat of formation: -601.7 kJ/mol at 25 °C; free energy of formation: -569.44 kJ/mol at 25 °C; Mohs' hardness: 5.5-6.0|For more Other Experimental Properties (Complete) data for MAGNESIUM OXIDE (7 total), please visit the HSDB record page.

No rapid reaction with air. No rapid reaction with water.

Salts, Basic

Phosphorus pentachloride and magnesium oxide react with brilliant incandescence [Mellor 8:1016. 1946-1947]. The oxide is incompatible with interhalogens such as bromine pentafluoride, etc.

Noncombustible Solid