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Magnesium oxide(CAS No. 1309-48-4)

Magnesium oxide MgO (cas 1309-48-4) Molecular Structure

1309-48-4 Structure

Identification and Related Records

【Name】
Magnesium oxide
【CAS Registry number】
1309-48-4
【Synonyms】
Magnesium monoxide
Magox
Marmag
Micromag 150
Micromag 3-30
NanoActive Magnesium Oxide Plus
NanoActiveMgO Plus
PG 9033
Pyrokisuma 3320
Pyrokisuma 3320K
Pyrokisuma 530
RSG
Rhenofit D/A
SL
SLO 469
SSP 1
Sanka Magnesium EL
Starmag 150
Anscor P
Calcinedmagnesia
Caustic magnesite
DAB 6 (oxide)
E 10 (oxide)
E 4 (oxide)
Elastomag 100
FMR-PC
FloMag HP
FloMag HP-ER
HP 30
HTMg 02
KM 3
KM 3150
KMA-X
KMAOH-F
KP 3083
KPLL 20
Kyowaad 100
Kyowamag 150
Kyowamag 150B
Kyowamag 20
Kyowamag 30
Kyowamag 60
Kyowamag MF 30
Liquimag A
Luvatol 35
Luvatol DH 25
Luvatol EK100KM
Luvatol MK 35
MF 30
MJ 30
Mag Chem 10
Mag Chem 10-325
Mag Chem 200AD
【EINECS(EC#)】
215-171-9
【Molecular Formula】
MgO (Products with the same molecular formula)
【Molecular Weight】
40.3
【Inchi】
InChI=1/Mg.O/rMgO/c1-2
【InChIKey】
CPLXHLVBOLITMK-UHFFFAOYSA-N
【Canonical SMILES】
O=[Mg]
【MOL File】
1309-48-4.mol

Chemical and Physical Properties

【Appearance】
white or light grey powder
【Density】
3.58
【Melting Point】
2852℃
【Boiling Point】
3600℃
【Refractive Index】
1.736
【Flash Point】
3600°C
【Water】
6.2 mg/L (20℃), reacts
【Solubilities】
Insoluble
【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
【Stability】
Stable. Incompatible with bromine trifluoride, bromine trichloride, phosphorus pentachloride.
【HS Code】
25199010
【Storage temp】
Store in a cool, dry place. Keep away from water. Keep containers tightly closed.
【Spectral properties】
Index of refraction: 1.735
Highly reflective in visible and near UV region
【Computed Properties】
Molecular Weight:40.3044 [g/mol]
Molecular Formula:MgO
H-Bond Donor:0
H-Bond Acceptor:1
Rotatable Bond Count:0
Exact Mass:39.979957
MonoIsotopic Mass:39.979957
Topological Polar Surface Area:17.1
Heavy Atom Count:2
Formal Charge:0
Complexity:2
Isotope Atom Count:0
Defined Atom Stereocenter Count:0
Undefined Atom Stereocenter Count:0
Defined Bond Stereocenter Count:0
Undefined Bond Stereocenter Count:0
Covalently-Bonded Unit Count:1

Safety and Handling

【Hazard Codes】
Not regulated
【Risk Statements】
R20/22
【Safety Statements 】
S24/25
【HazardClass】
8
【Safety】

Risk Statements of Magnesium oxide (CAS NO.1309-48-4): 20/22-36/37/38
R20/22:Harmful by inhalation and if swallowed.?
R36/37/38:Irritating to eyes, respiratory system and skin.
Safety Statements: 24/25
S24/25:Avoid contact with skin and eyes.
RIDADR: UN 1418
WGK Germany: 1
RTECS: OM3850000
F: 3
HazardClass: 8
PackingGroup: III
HS Code: 25199010
Hazardous Substances Data 1309-48-4(Hazardous Substances Data)
Inhalation of the fumes can produce a febrile reaction and leucocytosis in humans. Questionable carcinogen with experimental tumorigenic data. Violent reaction or ignition in contact with interhalogens (e.g., bromine pentafluoride, chlorine trifluoride). Incandescent reaction with phosphorus pentachloride. See also MAGNESIUM COMPOUNDS.

【PackingGroup 】
III
【Sensitive】
Air Sensitive
【Skin, Eye, and Respiratory Irritations】
Toxic by inhalation of fumes.
Examination of 95 workers exposed to an unspecified concentration of MgO dust revealed slight iritation of the eyes and nose. ... Conjunctivitis, nasal catarrh, and coughing up discolored sputum /was cited/ after industrial exposures, but even when such exposures doubled serum magnesium as compared to normal concentrations, no systematic effects were noted amoung these workers; however, serum calcium concentrations were elevated.
【Transport】
UN 1418
【Formulations/Preparations】
Grades: Technical, chemically pure, ... /USP/, 99.5%, Food Chemical Codex, fused, low boron, rubber, semiconductor, single crystals.
The principal commercial forms of magnesia are dead-burned magnesia (periclase), caustic-calcined (light-burned magnesia), hard-burned magnesia, and calcined dolomite.
【Exposure Standards and Regulations】
Magnesium oxide used as a nutrient and/or dietary supplement in animal drugs, feeds, and related products is generally recognized as safe when used in accordance with good manufacturing or feeding practice.
【Reactivities and Incompatibilities】
Chlorine trifluoride, phosphorus pentachloride.
/Phosphorus pentachloride and magnesium oxide/ ... react with brilliant incandescence.
Violent reaction or ignition on contact with interhalogens (e.g., bromine pentafluoride; chlorine trifluoride). Incandescent reaction with phosphorus pentachloride.
Chlorine trifluoride reacts violently, producing flame, with ... magnesium oxide ... .
【Protective Equipment and Clothing】
Respirator Recommendations: Up to 150 mg/m3: (Assigned protection factor = 10) Any dust, mist, and fume respirator/(Assigned protection factor = 10) Any supplied-air respirator.
Respirator Recommendations: Up to 375 mg/m3: (Assigned protection factor = 25) Any supplied-air respirator operated in a continuous-flow mode/(Assigned protection factor = 25) Any powered, air-purifying respirator with a dust, mist, and fume filter.
Respirator Recommendations: Up to 750 mg/m3: (Assigned protection factor = 50) Any air-purifying, full-facepiece respirator with a high-efficiency particulate filter/(Assigned protection factor = 50) Any powered, air-purifying respirator with a tight-fitting facepiece and a high-efficiency particulate filter (substance reported to cause eye irritation or damage; may require eye protection)/(Assigned protectioin factor = 50) Any self-contained breathing apparatus with a full facepiece/(Assigned protection factor = 50) Any supplied-air respirator with a full facepiece.
Respirator Recommendations: Emergency or planned entry into unknown concentrations or IDLH conditions: (Assigned protection factor = 10,000) Any self-contained breathing apparatus that has a full facepiece and is operated in a pressure-demand or other positive-pressure mode/(Assigned protection factor = 10,000) Any supplied-air respirator that has a full facepiece and is operated in a pressure-demand or other positive-pressure mode in combination with an auxiliary self-contained positive-pressure breathing apparatus. SRP: The scientific literature for the use of contact lenses in industry is conflicting. The benefit or detrimental effects of wearing contact lenses depend not only upon the substance, but also on factors including the form of the substance, characteristics and duration of the exposure, the uses of other eye protection equipment, and the hygiene of the lenses. However, there may be individual substances whose irritating or corrosive properties are such that the wearing of contact lenses would be harmful to the eye. In those specific cases, contact lenses should not be worn. In any event, the usual eye protection equipment should be worn even when contact lenses are in place.
Respirator Recommendations: Escape: (Assigned protection factor = 50) Any air-purifying, full-facepiece respirator with a high-efficiency particulate filter/Any appropriate escape-type, self-contained breathing apparatus.
Personnel protection: ? Wear positive pressure self-contained breathing apparatus. ? Wear appropriate chemical protective clothing. ? /Magnesium alkyls/
Personnel protection: Wear appropriate chemical protective gloves, boots and goggles. /Magnesium powder or magnesium alloys, powder/ SRP: Contaminated protective clothing should be segregated in such a manner so that there is no direct personal contact by personnel who handle, dispose, or clean the clothing. Quality assurance to ascertain the completeness of the cleaning procedures should be implemented before the decontaminated protective clothing is returned for reuse by the workers. Contaminated clothing should not be taken home at end of shift, but should remain at employee's place of work for cleaning.
【Specification】

??Magnesium oxide ,?its cas register number is 1309-48-4. It also can be called?100A (oxide) ; AM 2 (cement additive) ;
?Akro-mag ; Animag ; Anscor P ; BayMag ; Calcined brucite ; Calcined magnesia ; Causmag ; Caustic magnesite ; Elastomag 170 ; Fert-O-Mag ; FloMag HP ; Granmag ; Hamag LP ; Heavy calcined magnesia ; Heavy magnesia ; Heavy magnesium oxide ; Light magnesia ; Liquimag A ; Liquimag B ; Luvatol MK 35 ; Maglite ; Magmilax bolus ; Magnesa preprata ;?
?Magnesia ; Magnesia USTA ; Magnesia monoxide ; Magnezu tlenek ; Magox ; Marmag ; Oxymag ; Periclase ; Seasorb ;
?Seawater magnesia .

【Report】

Reported in EPA TSCA Inventory.

【Disposal Methods】
SRP: At the time of review, criteria for land treatment or burial (sanitary landfill) disposal practices are subject to significant revision. Prior to implementing land disposal of waste residue (including waste sludge), consult with environmental regulatory agencies for guidance on acceptable disposal practices.

Use and Manufacturing

【Use and Manufacturing】
Methods of Manufacturing

... /Dolomitic/ limestone is calcined at a high temperature under controlled conditions to produce calcined dolomite or dolime which upon reaction with magnesium chloride-rich brine produces magnesium hydroxide and calcium chloride. The insoluble magnesium hydroxide is then separated from the liquid calcium chloride carrier and calcined under controlled conditions. The various grades of magnesia range from very reactive light-burned to nonreactive dead-burned.
CALCINING OF MAGNESIUM CARBONATE OR MAGNESIUM HYDROXIDE; TREATMENT OF MAGNESIUM CHLORIDE WITH LIME AND THEN HEATING, OR BY HEATING MAGNESIUM CHLORIDE IN AIR; FROM SEAWATER VIA THE HYDROXIDE
COMMERCIAL PREPN FROM MAGNESITE ORES: ADAMS, US PATENT 3,320,029 (1967 TO NORTHWEST MAGNESITE).
... Mining, crushing, sizing, and subsequent calcination of natural magnesite. The chemical purity of the magnesia produced is dependent on the mineralogical composition of the natural magnesite.
A concentrated magnesium chloride brine processed from the Dead Sea is sprayed into a reactor at about 1700 deg C. The brine is thermally decomposed into magnesium oxide and hydrochloric acid. To further process the magnesia, the product is slaked to form magnesium hydroxide which is then washed, filtered, and calcined under controlled conditions to produce a variety of magnesium oxide reactivity grades.
The seawater process ... involves decarbonating limestone or dolomite to the point where all CO2 is removed without converting the resulting magnesia to a chemically inactive form. Reaction of filtered seawater, treated to remove bicarbonate and/or sulfate, and dolime is followed by seeding with magnesium hydroxide to promote crystal growth. Upon formation of magnesium hydroxide, flocculants are added and the magnesium hydroxide precipitate is allowed to settle while the spent seawater is disposed to the sea. The precipitate is washed, filtered, and dried to obtain magnesium hydroxide which is calcined to produce light-burned, hard-burned, or dead-burned magnesium oxide.
U.S. Exports

(1972) 2.62X10+8 GRAMS
U.S. Imports

(1972) 4.91X10+10 GRAMS (MAGNESIA, MAGNESITE)
(1975) 3.27X10+8 GRAMS
U.S. Production

(1972) 1.82X10+11 GRAMS (MAGNESIA)
Consumption Patterns

20% IS USED IN CHEMICAL MANUFACTURING; 18% IN ANIMAL FEED AND FERTILIZER; 16% FOR MEDICINALS, INSULATION AND WALLBOARD, FLUX, AND PETROLEUM ADDITIVES; 14% FOR OXYCHLORIDE AND OXYSULFATE CEMENT; 12% FOR PULP AND PAPER MANUFACTURING; 6% AS A RUBBER ACCELERATOR; 4% USED IN FOODS; 2% IN ELECTRICAL HEATING RODS; 8% FOR UNSPECIFIED USES (1972)
CHEMICAL GRADE ONLY-DERIVATIVE: ANIMAL FEEDS AND FERTILIZERS, 35%; MEDICINALS, SUGAR & WINE MAKING, 4%; CONSTRUCTION MATERIALS, 5%; PULP, PAPER AND RAYON, 18%; RUBBER, 8%; PETROLEUM ADDITIVES, 15%; MISC, 15% (1981)
/MAGNESIUM COMPOUNDS/ PRODUCTION OF BASIC REFRACTORIES USED IN HIGH-TEMP METALLURGICAL FURNACES, 80%; AND PREP OF CAUSTIC CALCINED & SPECIFIED MAGNESIA, 20% (1985)
【Usage】

Chemical intermediate medicinals & other chems, component of animal feeds, fertilizers, insulation, & wallboard, component of petroleum additives, oxychloride & oxysulfate cement, agent in pulp & paper mfr, food chem, rubber accelerator, component of electrical heating rods, misc applications.

Biomedical Effects and Toxicity

【Pharmacological Action】
- Substances that counteract or neutralize acidity of the GASTROINTESTINAL TRACT.
【Therapeutic Uses】
Antacids; Cathartics
...EFFECTIVE NONSYSTEMIC GASTRIC ANTACID (1 G NEUTRALIZES APPROX 87 ML OF 0.1 N HCL IN 10 MIN & 305 ML IN 2 HR). SINCE IN WATER IT IS CONVERTED TO THE HYDROXIDE, ITS BIOL PROPERTIES ARE SAME AS HYDROXIDE. CONSEQUENTLY, IT DOES NOT NEUTRALIZE GASTRIC CONTENTS EXCESSIVELY & DOES NOT LIBERATE CARBON DIOXIDE...
MAGNESIUM OXIDE, USP, IS USUALLY INCORPORATED INTO VARIOUS MIXT. WHEN IT IS USED ALONE, OFFICIAL DOSE IS 250 MG, WHICH IS INADEQUATE. ALTHOUGH 1 G CONTAINS APPROX 50 MEQ OF BASE, ONLY 8-20 MEQ MAY REACT WITH GASTRIC ACID IN 30 MIN.
/Exptl Ther/ The authors compared the antimanic effects of a verapamil magnesium oxide (VM) combination with a verapamil placebo combination (VP) in patients pretreated with verapamil. BPRS scores and serum magnesium levels were compared. The VM combination was found to be significantly more effective than VP in reducing manic symptoms (P=0.015). Serum magnesium levels were significantly higher in the VM group (P<0.04). These data suggest that magnesium may increase antimanic efficacy of verapamil by mechanisms which may operate at the intracellular level. The magnesiumverapamil combination may have clinical application as an adjunct to verapamil in the maintenance therapy of mania. [Giannini AJ, et al; Psychiatry Research 93 (1): 83-87 (2000)]
【Biomedical Effects and Toxicity】
INSOL COMPD SUCH AS MgO ARE RETAINED FOR A LONGER PERIOD... MAGNESIUM IS RETAINED IN SKELETON, MUSCLE, & SOFT TISSUE.
This study was conducted to evaluate the ability of the large intestine to absorb calcium (Ca) and magnesium (Mg) from their sparingly water-soluble salts, and also to determine whether fructooligosaccharides (FOS) stimulate the absorption of these minerals in rat large intestine in vivo. Rats were fed Ca- and Mg-free diets with and without 5% FOS. An aqueous suspension of CaCO3 and MgO was infused into the stomach via a gastric tube or into the cecum via an implanted catheter. Coprophagy was prevented by using wire-mesh anal cups throughout the experiment so as to exclude the re-ingestion of feces as an oral mineral source. In rats fed an FOS-free diet, the absorption degrees of Ca and Mg infused into the cecum were the same as those infused into the stomach. The absorption degree of phosphorus (P) was slightly but significantly higher in rats with the infusion of Ca and Mg into the cecum than in rats with the infusion of Ca and Mg into the stomach. FOS-feeding increased the absorption of Mg to a similar extent in either case of infusion via cecal and oral routes, while FOS-feeding did not increase the absorption of Ca in rats with infusion of Ca and Mg into the cecum. We concluded that both CaCO3 and MgO are absorbed in the large intestine, and we ascertained that the increasing effect of FOS on the absorption of Mg took place mainly in the large intestine. [Ohta A, et al; J Nutr Sci Vitaminol 43 (1): 35-46 (1997)] PubMed Abstract

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