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MSDS 
:
 Magnesium Oxide, P.A.
CAS 
:
 1309-48-4
SYNONYMS 
:
 Magnesia, Calcined Magnesium, Calcined Brucite
**** SECTION 2 - COMPOSITION, INFORMATION ON INGREDIENTS ****

+----------------+--------------------------------------+----------+-----------+
| CAS# | Chemical Name | % | EINECS# |
|----------------|--------------------------------------|----------|-----------|
| 1309-48-4 |Magnesium oxide | 100 | 215-171-9 |
+----------------+--------------------------------------+----------+-----------+
Hazard Symbols: None Listed.
Risk Phrases: None Listed.

**** SECTION 3 - HAZARDS IDENTIFICATION ****

EMERGENCY OVERVIEW
Hygroscopic.

Potential Health Effects
Eye:
May cause eye irritation.
Skin:
May cause skin irritation.
Ingestion:
May cause gastrointestinal irritation with nausea, vomiting and
diarrhea. May cause central nervous system depression.
Inhalation:
May cause respiratory tract irritation. Inhalation of fumes may
cause metal fume fever, which is characterized by flu-like symptoms
with metallic taste, fever, chills, cough, weakness, chest pain,
muscle pain and increased white blood cell count.
Chronic:
No information found.

**** SECTION 4 - FIRST AID MEASURES ****

Eyes:
Immediately flush eyes with plenty of water for at least 15 minutes,
occasionally lifting the upper and lower eyelids. Get medical aid
immediately.
Skin:
Get medical aid if irritation develops or persists. Wash clothing
before reuse. Flush skin with plenty of soap and water.
Ingestion:
If victim is conscious and alert, give 2-4 cupfuls of milk or water.
Never give anything by mouth to an unconscious person. Get medical
aid immediately.
Inhalation:
Remove from exposure to fresh air immediately. If not breathing,
give artificial respiration. If breathing is difficult, give oxygen.
Get medical aid.
Notes to Physician:
Antidote:
The use of Calcium gluconate to precipitate the oxalate should be
determined by only qualified medical personnel.

**** SECTION 5 - FIRE FIGHTING MEASURES ****

General Information:
As in any fire, wear a self-contained breathing apparatus in
pressure-demand, MSHA/NIOSH (approved or equivalent), and full
protective gear. During a fire, irritating and highly toxic gases
may be generated by thermal decomposition or combustion.
Extinguishing Media:
Use water spray, dry chemical, carbon dioxide, or chemical foam. Do
NOT get water inside containers.

**** SECTION 6 - ACCIDENTAL RELEASE MEASURES ****

General Information: Use proper personal protective equipment as indicated
in Section 8.
Spills/Leaks:
Wash area with soap and water. Clean up spills immediately,
observing precautions in the Protective Equipment section. Sweep up,
then place into a suitable container for disposal. Avoid generating
dusty conditions. Do not get water inside containers.

**** SECTION 7 - HANDLING and STORAGE ****

Handling:
Wash thoroughly after handling. Avoid contact with eyes, skin, and
clothing. Keep container tightly closed. Avoid ingestion and
inhalation. Use with adequate ventilation. Wash clothing before
reuse. Keep from contact with moist air and steam.
Storage:
Store in a cool, dry place. Keep away from water. Keep containers
tightly closed.

**** SECTION 8 - EXPOSURE CONTROLS, PERSONAL PROTECTION ****

Engineering Controls:
Use adequate general or local exhaust ventilation to keep airborne
concentrations below the permissible exposure limits.
Personal Protective Equipment

Eyes:
Wear appropriate protective eyeglasses or chemical
safety goggles as described by OSHA's eye and face
protection regulations in 29 CFR 1910.133 or European
Standard EN166.
Skin:
Wear appropriate protective gloves to prevent skin
exposure.
Clothing:
Wear appropriate protective clothing to prevent skin
exposure.
Respirators:
Follow the OSHA respirator regulations found in 29CFR
1910.134 or European Standard EN 149. Always use a
NIOSH or European Standard EN 149 approved respirator
when necessary.

**** SECTION 9 - PHYSICAL AND CHEMICAL PROPERTIES ****

Physical State: Solid
Appearance: white
Odor: Odorless
pH: 10 (sat. solution)
Vapor Pressure: Not available.
Viscosity: Not available.
Boiling Point: 3600 deg C
Freezing/Melting Point: 2500-2800C
Autoignition Temperature: Not available.
Flash Point: Not available.
Explosion Limits, lower: Not available.
Explosion Limits, upper: Not available.
Decomposition Temperature: Not available.
Solubility in water: Slightly soluble in water
Specific Gravity/Density: 3.65-3.75
Molecular Formula: MgO
Molecular Weight: 40.3044

**** SECTION 10 - STABILITY AND REACTIVITY ****

Chemical Stability:
Stable under normal temperatures and pressures.
Conditions to Avoid:
Incompatible materials, moisture, exposure to air.
Incompatibilities with Other Materials:
Strong oxidizing agents; reacts violently with phosphorous
pentachloride, chlorine trichloride, or bromine pentafluoride. Will
absorb CO2 from air.
Hazardous Decomposition Products:
None.
Hazardous Polymerization: Has not been reported

**** SECTION 11 - TOXICOLOGICAL INFORMATION ****

RTECS#:
CAS# 1309-48-4: OM3850000
LD50/LC50:
Not available.
Carcinogenicity:
Magnesium oxide -
Not listed by ACGIH, IARC, NIOSH, NTP, or OSHA.
Other:
See actual entry in RTECS for complete information.

**** SECTION 12 - ECOLOGICAL INFORMATION ****



**** SECTION 13 - DISPOSAL CONSIDERATIONS ****

Dispose of in a manner consistent with federal, state, and local regulations.

**** SECTION 14 - TRANSPORT INFORMATION ****

IATA
Not regulated as a hazardous material.
IMO
Not regulated as a hazardous material.
RID/ADR
Shipping Name: Not regulated.
Dangerous Goods Code:
UN Number:

**** SECTION 15 - REGULATORY INFORMATION ****

European/International Regulations
European Labeling in Accordance with EC Directives
Hazard Symbols: Not available.
Risk Phrases:
Safety Phrases:
S 24/25 Avoid contact with skin and eyes.
WGK (Water Danger/Protection)
CAS# 1309-48-4: 1
United Kingdom Occupational Exposure Limits
CAS# 1309-48-4: OES-United Kingdom, TWA fume and respirable dust, as
Mg: 4 mg/m3 TWA; total inhalable dust, as Mg: 10 mg
CAS# 1309-48-4: OES-United Kingdom, STEL fume and respirable dust,
as Mg: 10 mg/m3 STEL
Canada
CAS# 1309-48-4 is listed on Canada's DSL List.
CAS# 1309-48-4 is listed on Canada's Ingredient Disclosure List.
Exposure Limits
CAS# 1309-48-4: OEL-ARAB Republic of Egypt:TWA 10 mg/m3
OEL-AUSTRALIA:TWA 10 mg/m3 JANUARY 1993
OEL-BELGIUM:TWA 10 mg/m3 JANUARY 1993
OEL-DENMARK:TWA 6 mg/m3
OEL-FRANCE:TWA 10 mg/m3 JANUARY 1993
OEL-GERMANY:TWA 6 mg/m3
OEL-GERMANY:TWA 6 mg/m3 JANUARY 1993
OEL-HUNGARY:TWA 5 mg/m3;STEL 10 mg/m3
OEL-THE NETHERLANDS:TWA 10 mg/m3 JANUARY 1993
OEL-THE PHILIPPINES:TWA 15 mg/m3 JANUARY 1993
OEL-POLAND:TWA 15 mg/m3
OEL-RUSSIA:STEL 5 mg/m3
OEL-SWITZERLAND:TWA 6 mg/m3
OEL-SWITZERLAND:TWA 6 mg/m3;STEL 12 mg/m3 JANUAR 1993
OEL-TURKEY:TWA 15 mg/m3
OEL-UNITED KINGDOM:TWA 10 mg/m3 JANUARY 1993
OEL-UNITED KINGDOM:TWA 10 mg/m3 (total dust)
OEL IN BULGARIA, COLOMBIA, JORDAN, KOREA check ACGIH TLV
OEL IN NEW ZEALAND, SINGAPORE, VIETNAM check ACGI TLV
US FEDERAL
TSCA
CAS# 1309-48-4 is listed on the TSCA inventory.

**** SECTION 16 - ADDITIONAL INFORMATION ****

MSDS Creation Date: 5/14/1998 Revision #2 Date: 8/02/2000

The information above is believed to be accurate and represents the best
information currently available to us. However, we make no warranty of
merchantability or any other warranty, express or implied, with respect to
such information, and we assume no liability resulting from its use. Users
should make their own investigations to determine the suitability of the
information for their particular purposes. In no way shall the company be
liable for any claims, losses, or damages of any third party or for lost
profits or any special, indirect, incidental, consequential or exemplary
damages, howsoever arising, even if the company has been advised of
the possibility of such damages.
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