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| Product Name: | Magnesium oxide | Other Name: | 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 |
| CAS No.: | 1309-48-4 | Molecular Formula: | MgO |
| InChIKeys: | InChIKey=CPLXHLVBOLITMK-UHFFFAOYSA-N | Molecular Weight: | 40.30440 |
| Exact Mass: | 39.98000 | EC Number: | 215-171-9 |
| ICSC Number: | 0504 | DSSTox ID: | DTXSID9049665 |
| Color/Form: | 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 | HScode: | 25199010 |
| Categories: | Anticaking Agent |
| PSA: | 17.07000 | XLogP3: | -0.11880 |
| Appearance: | 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. | Density: | 3″>3.58 g/cm3 |
| Melting Point: | 2800 °C | Boiling Point: | 3600 °C |
| Flash Point: | 3600ºC | Refractive Index: | 1.736 |
| Water Solubility: | H2O: 5 M HCl: 0.1 M at 20 °C, clear, colorless | 6.2 mg/L (20 ºC), reacts | Storage Conditions: | Store in a cool, dry place. Keep away from water. Keep containers tightly closed. |
| Vapor Pressure: | 0 mmHg (approx) | Flammability characteristics: | Noncombustible Solid |
| Odor: | Odorless | PH: | pH = 10.3 (saturated aqueous solution) |
| Experimental Properties: | 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. | Air and Water Reactions: | No rapid reaction with air. No rapid reaction with water. |
| Reactive Group: | Salts, Basic | Reactivity Profile: | 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. |
| Flammable Limits: | Noncombustible Solid |
Classification of the substance or mixture
Not classified.
GHS label elements, including precautionary statements
| Pictogram(s) | No symbol. |
|---|---|
| Signal word |
No signal word |
| Hazard statement(s) |
none |
| Precautionary statement(s) | |
| Prevention |
none |
| Response |
none |
| Storage |
none |
| Disposal |
none |
Other hazards which do not result in classification
no data available
Precautions for safe handling
NO contact with strong acids. Handling in a well ventilated place. Wear suitable protective clothing. Avoid contact with skin and eyes. Avoid formation of dust and aerosols. Use non-sparking tools. Prevent fire caused by electrostatic discharge steam.
Conditions for safe storage, including any incompatibilities
Separated from strong acids. Dry. Well closed.Store in tightly closed containers in a cool, well ventilated area away from moisture.