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1309-48-4

Basic Information
CAS No.: 1309-48-4
Name: Magnesium oxide
Article Data: 11
Cas Database
Molecular Structure:
Molecular Structure of 1309-48-4 (Magnesium oxide)
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
Hazard Symbols: N/A
Risk Codes: 20/22-36/37/38
Safety: 24/25
Transport Information: UN 1418
PSA: 17.07000
LogP: -0.11880
Synthetic route
7439-95-4

magnesium

1309-48-4

magnesium oxide

Conditions
ConditionsYield
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;
7439-95-4

magnesium

10024-97-2

dinitrogen monoxide

1309-48-4

magnesium oxide

Conditions
ConditionsYield
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;;
7439-95-4

magnesium

1309-48-4

magnesium oxide

Conditions
ConditionsYield
In gaseous matrix Kinetics; N2 flow carrier; laser-induced fluorescence;

magnesium peroxide

oxygen

1309-48-4

magnesium oxide

Conditions
ConditionsYield
In gaseous matrix Kinetics; in flow of N2; laser induced fluorescence;

4.6H2O*3Mg(2+)*6HO(1-)*MgCl2

1309-48-4

magnesium oxide

Conditions
ConditionsYield
In neat (no solvent, solid phase) at 400℃;
1309-48-4

magnesium oxide

chloroplatinic acid

rhodium (III) acetate

Reaxys ID: 11558454

Reaxys ID: 11558454

Conditions
ConditionsYield
Stage #1: magnesium oxide; chloroplatinic acid; rhodium (III) acetate; oxygen In water at 20 - 120℃; for 2.5h;
Stage #2: at 1050℃; for 3h;
1309-48-4

magnesium oxide

chloroplatinic acid

Reaxys ID: 11558455

Reaxys ID: 11558455

Conditions
ConditionsYield
Stage #1: magnesium oxide; chloroplatinic acid; oxygen In water at 20 - 120℃; for 2.5h;
Stage #2: at 750℃; for 3h;
1309-48-4

magnesium oxide

10049-08-8

ruthenium(III)chloride

Reaxys ID: 11558547

Reaxys ID: 11558547

Conditions
ConditionsYield
Stage #1: magnesium oxide; oxygen; ruthenium(III)chloride In water at 20 - 120℃; for 2.5h;
Stage #2: at 970℃; for 3h;
1309-48-4

magnesium oxide

rhodium (III) acetate

Reaxys ID: 11558545

Reaxys ID: 11558545

Conditions
ConditionsYield
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;
1309-48-4

magnesium oxide

20759-14-2

ruthenium(III) chloride hydrate

Reaxys ID: 11558547

Reaxys ID: 11558547

Conditions
ConditionsYield
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.