Home Categories Inorganic chemistry Mangesium
A5412212

Mangesium , SP , 7439-95-4

Synonym(s):
Magnesium;NMDG;Magnesium foil;Magnesium Shot;Magnesium element

CAS NO.:7439-95-4

Empirical Formula: Mg

Molecular Weight: 24.31

MDL number: MFCD00085308

EINECS: 231-104-6

Update time: 2022-07-08

PRODUCT Properties

Melting point: 648 °C (lit.)
Boiling point: 1090 °C (lit.)
Density  1.74 g/mL at 25 °C (lit.)
vapor density  6 (vs air)
vapor pressure  1 mm Hg ( 621 °C)
Flash point: −26 °F
storage temp.  Store below +30°C.
solubility  H2O: 1 M at 20 °C, clear, colorless
form  turnings
Specific Gravity 1.74
color  White
Resistivity 4.46 μΩ-cm, 20°C
Water Solubility  REACTS
Sensitive  Hygroscopic
Crystal Structure HCP, Space Group P63/mmc
Merck  14,5674
BRN  4948473
Exposure limits ACGIH: TWA 2 ppm; STEL 4 ppm
OSHA: TWA 2 ppm(5 mg/m3)
NIOSH: IDLH 25 ppm; TWA 2 ppm(5 mg/m3); STEL 4 ppm(10 mg/m3)
LogP -0.57 at 20℃

Description and Uses

Magnesium is a Group 2 element (Group IIA in older labeling schemes). This element has the symbol Mg, atomic number 12, atomic weight of 24.305 g/mol and common oxidation number +2. It is the eighth most abundant element in the earth s crust by mass, although ninth in the Universe as a whole. This preponderance of magnesium in the Universe is related to the fact that it is easily built up in supernova stars from a sequential addition of three helium nuclei to carbon (which in turn is made from three helium nuclei). Magnesium constitutes about 2% of the Earth s crust by mass, which makes it the eighth most abundant element in the crust. Magnesium ion’s high solubility in water helps to ensure that it is the third most abundant element dissolved in seawater.

In alloys to produce light weight structural metals. In aluminum alloys to improve mechanical properties; in Grignard reagents; in dry cell batteries; in pyrotechnics. For hot metal desulfurization, especially. molten iron; production of ductile iron; metal reduction to produce elemental boron, titanium, zirconium; corrosion protection of steel structures; sacrificial anodes for corrosion protection.

Safety

Symbol(GHS) 
GHS02
Signal word  Danger
Hazard statements  H228-H261
Precautionary statements  P210-P223-P231+P232-P240-P241-P280
Hazard Codes  F,Xn
Risk Statements  34-15-11-17-36/37/38-22-19-40-36/37
Safety Statements  43-7/8-43A-36-33-26-36/37-16
RIDADR  UN 2056 3/PG 2
WGK Germany  1
RTECS  OM3756000
3-9
Autoignition Temperature 950 °F
TSCA  Yes
HazardClass  4.1
PackingGroup  III
HS Code  81049000

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