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| CAS No.: | 1309-48-4 |
|---|---|
| Name: | Magnesium oxide |
| Article Data: | 11 |
| Cas Database | |
| Molecular Structure: | |
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| Formula: | MgO |
| Molecular Weight: | 41.3123 |
| Synonyms: | Magnesiumoxalatedihydrate;Oxalic acid magnesium salt;magnesium monoxide;Magnesiumoxalat;Oxalic acid magnesium;Ethanedioic acid,magnesium salt;magnesium oxalate;MAGNESIUM PERMANGANATE HYDRATE;Magnesiumoxalat-2-hydrat;Mg monoxide;magnesium oxalate dihydrate,puratronic; |
| EINECS: | 215-171-9 |
| Density: | 3.58 g/cm3 |
| Melting Point: | 2852 °C |
| Boiling Point: | 3600 °C |
| Flash Point: | 3600oC |
| Solubility: | 5 M HCl: 0.1 M at 20 °C, clear, colorless |
| Appearance: | white or light grey powder |
| Risk Codes: | 20/22-36/37/38 |
| Safety: | 24/25 |
| Transport Information: | UN 1418 |
| PSA: | 17.07000 |
| LogP: | -0.11880 |
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| Conditions | Yield |
|---|---|
| With nitrogen oxidous In gaseous matrix byproducts: N2; dc discharge (potential 1.5 kV, current 50 mA) of a mixt. of hot Mg vapor, N2O and Ar, react. temp. 900 K, press. 3 Pa, color of emission changed from weak purple to green after evapn. of Mg; detection by IR spectroscopy; |
| Conditions | Yield |
|---|---|
| In gas Mg was resistively heated to 700°C, and the metal vapor was entrained in an Ar carrier gas and allowed to react with N2O;; | |
| In gaseous matrix resistively heated (25 A, 60 Hz at 4 V, 600 K, (Ar) or 50 A dc at 6 V), dc discharge (300 mA at 30 V, (He)); | |
| In neat (no solvent, gas phase) byproducts: N2; reaction at 1100 K; apparatus described; laser excitation spectrum;; not isolated;; |
| Conditions | Yield |
|---|---|
| In gaseous matrix Kinetics; N2 flow carrier; laser-induced fluorescence; |
| Conditions | Yield |
|---|---|
| In gaseous matrix Kinetics; in flow of N2; laser induced fluorescence; |
- 1309-48-4
magnesium oxide
| Conditions | Yield |
|---|---|
| In neat (no solvent, solid phase) at 400℃; |
- 1309-48-4
magnesium oxide
- 80937-33-3
oxygen
| Conditions | Yield |
|---|---|
| Stage #1: magnesium oxide; chloroplatinic acid; rhodium (III) acetate; oxygen In water at 20 - 120℃; for 2.5h; Stage #2: at 1050℃; for 3h; |
| Conditions | Yield |
|---|---|
| Stage #1: magnesium oxide; chloroplatinic acid; oxygen In water at 20 - 120℃; for 2.5h; Stage #2: at 750℃; for 3h; |
| Conditions | Yield |
|---|---|
| Stage #1: magnesium oxide; oxygen; ruthenium(III)chloride In water at 20 - 120℃; for 2.5h; Stage #2: at 970℃; for 3h; |
| Conditions | Yield |
|---|---|
| Stage #1: magnesium oxide; rhodium (III) acetate; oxygen In water at 20 - 120℃; for 2.5h; Stage #2: at 1100℃; for 2h; | |
| Stage #1: magnesium oxide; rhodium (III) acetate; oxygen In water at 20 - 120℃; for 2.5h; Stage #2: at 370℃; | |
| Stage #1: magnesium oxide; rhodium (III) acetate; oxygen In water at 20 - 120℃; for 2.5h; Stage #2: at 950℃; for 1.5h; |
| Conditions | Yield |
|---|---|
| Stage #1: magnesium oxide; ruthenium(III) chloride hydrate; oxygen In water at 20 - 120℃; for 2.5h; Stage #2: at 920℃; for 2h; | |
| Stage #1: magnesium oxide; ruthenium(III) chloride hydrate; oxygen In water at 20 - 120℃; for 2.5h; Stage #2: at 950℃; for 3h; |
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Consensus Reports
Reported in EPA TSCA Inventory.
Standards and Recommendations
OSHA PEL: Fume: Total Dust: TWA 10 mg/m3; Respirable Fraction: 5 mg/m3
ACGIH TLV: TWA 10 mg/m3 (fume); Not Classifiable as a Human Carcinogen
DFG MAK: 1.5 mg/m3 (fume)
Analytical Methods
For occupational chemical analysis use OSHA: #ID-125 g.
Specification
Magnesium oxide , its cas register number is 1309-48-4. It also can be called 100A (oxide); Akro-mag; Animag; Anscor P; BayMag; Calcined brucite; Calcined magnesia. 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).
Preparation of Magnesium oxide:
Heating magnesium carbonate (MgCO3) or magnesium hydroxide [Mg(OH)2] produces Magnesium oxide(MgO).
MgCO3 → MgO
Mg(OH)2 → MgO
Use of Magnesium oxide:
1.In medicine, it is used for relief for heartburn and sore stomach, as an antacid, magnesium supplement, and as a short-term laxative. It is also used to improve symptoms of indigestion. Side effects of magnesium oxide may include nausea and cramping.In quantities sufficient to obtain a laxative effect, side effects of long-term use include enteroliths resulting in bowel obstruction.
2.It is used extensively in electrical heating as a component of "CalRod"-styled heating elements. There are several mesh sizes available and most commonly used ones are 40 and 80 mesh per the American Foundry Society. The extensive use is due to its high dielectric strength and average thermal conductivity. MgO is usually crushed and compacted with minimal airgaps or voids. The electrical heating industry also experimented with aluminium oxide, but it is not used anymore.
3.It is used as a reference white color in colorimetry, owing to its good diffusing and reflectivity properties.It may be smoked onto the surface of an opaque material to form an integrating sphere.
4.It is used as a principal ingredient in construction materials used for fireproofing.
5.It is used by many libraries for preserving books by reacting with ambient moisture to dry the book storage areas.
6.Used as a basic refractory material for crucibles.
7.Used as an insulator in industrial cables.
You can still convert the following datas into molecular structure:
(1)InChI=1S/Mg.O;
(2)InChIKey=CPLXHLVBOLITMK-UHFFFAOYSA-N;
(3)SmilesO=[Mg];
The toxicity data is as follows:
| Organism | Test Type | Route | Reported Dose (Normalized Dose) | Effect | Source |
|---|---|---|---|---|---|
| human | TCLo | inhalation | 400mg/m3 (400mg/m3) | "Patty's Industrial Hygiene and Toxicology," 3rd rev. ed., Clayton, G.D., and F.E. Clayton, eds., New York, John Wiley & Sons, Inc., 1978-82. Vol. 3 originally pub. in 1979; pub. as 2n rev. ed. in 1985.Vol. 2A, Pg. 1745, 1981. |