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Magnesium Oxide
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Magnesium Oxide
Chemical
Formula: MgO
CAS
number: 1309-48-4
It is used
as an insulator
in industrial
cables.
It is used as
a basic refractory
material for lining
crucibles.
It is used
as a principal
ingredient in
construction materials
used for fireproofing.
It is used
as a reference
white color in
colorimetry, owing
to its good diffusing
and reflectivity
properties.
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 air
gaps or voids.
It is used
in feeding animals.
Pressed MgO
is used as an
optical material.
It is transparent
from 300 nm to
7 µm. The refractive
index is 1.72
at 1 µm and the
Abbe number is
53.58. Crystalline
pure MgO is available
commercially and
has small use
in infrared optics.
In medicine,
magnesium oxide
is used for relief
for 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.
It is used
by many libraries
for preserving
books by reacting
with ambient moisture
to dry the book
storage areas.
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Physical
and Chemical
Properties
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Physical
Form: |
Powder
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Color: |
White
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Odor:
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Odorless |
Molecular
Weight:
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40.30
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Boiling
Point: |
3600°C
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Melting/Freezing
Point: |
2852°C
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Solubility
In Water: |
Insoluble
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Specific
Gravity: |
3.58
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