MAGNESIUM OXIDE
Chemwatch Material Safety Data Sheet
Issue Date: 24-Jun-2005 CHEMWATCH 10217
A317TC CD 2006/2 Page 1 of 9
Section 1 - CHEMICAL PRODUCT AND COMPANY IDENTIFICATION
PRODUCT NAME
MAGNESIUM OXIDE
SYNONYMS
MgO
PRODUCT USE
Component of refractory crucibles, fire bricks, insulation, rubber compounds,
plastics, petroleum products, food and feed additives, pulp and paper
manufacture, magnesia cements and boiler scale compounds. Manufacture of
magnesium metal, alloys and magnesium salts. Laboratory reagent. Reflector in
optical instruments; white colour standard.
SUPPLIER
Quantum Chemicals Pty Ltd
70 Quantum Close
Quantum Industrial Park
Dandenong South VIC 3175
Australia
Telephone: 1300 782 688
Emergency Tel: 1300 131 001
Fax: 1300 782 699
HAZARD RATINGS
Flammability
Toxicity
Body Contact
Reactivity
Chronic
SCALE: Min/Nil=0 Low=1 Moderate=2 High=3 Extreme=4
MAGNESIUM OXIDE
Chemwatch Material Safety Data Sheet
Issue Date: 24-Jun-2005 CHEMWATCH 10217
A317TC CD 2006/2 Page 2 of 9
Section 2 - HAZARDS IDENTIFICATION
STATEMENT OF HAZARDOUS NATURE
NON-HAZARDOUS SUBSTANCE. NON-DANGEROUS GOODS. According to
the Criteria of NOHSC, and the ADG Code.
POISONS SCHEDULE
None
RISK
Ingestion may produce health damage*.
* (limited evidence).
SAFETY
Do not breathe dust.
Take off immediately all contaminated clothing.
Section 3 - COMPOSITION / INFORMATION ON INGREDIENTS
NAME CAS RN %
magnesium oxide 1309-48-4. > 96
Section 4 - FIRST AID MEASURES
SWALLOWED
鈥? Immediately give a glass of water.
鈥? First aid is not generally required. If in doubt, contact a Poisons
Information Centre or a doctor.
EYE
If this product comes in contact with the eyes:
鈥? Immediately hold eyelids apart and flush the eye continuously with running
water.
鈥? Ensure complete irrigation of the eye by keeping eyelids apart and away from
eye and moving the eyelids by occasionally lifting the upper and lower lids.
鈥? Continue flushing until advised to stop by the Poisons Information Centre or a
doctor, or for at least 15 minutes.
鈥? Transport to hospital or doctor without delay.
鈥? Removal of contact lenses after an eye injury should only be undertaken by
skilled personnel.
SKIN
Brush off dust.
If skin or hair contact occurs:
鈥? Flush skin and hair with running water (and soap if available).
鈥? Seek medical attention in event of irritation.
INHALED
鈥? If dust is inhaled, remove from contaminated area.
鈥? Encourage patient to blow nose to ensure clear breathing passages.
鈥? Ask patient to rinse mouth with water but to not drink water.
鈥? Seek immediate medical attention.
NOTES TO PHYSICIAN
Magnesium is present in the blood, as a normal constituent, at concentrations
between 1.6 to 2.2 meq/l. Some 30% is plasma bound. At serum magnesium levels of
3-4 mEq/l, signs of CNS depression, loss of reflexes, muscular tone and power,
MAGNESIUM OXIDE
Chemwatch Material Safety Data Sheet
Issue Date: 24-Jun-2005 CHEMWATCH 10217
A317TC CD 2006/2 Page 3 of 9
Section 4 - FIRST AID MEASURES
and bradycardia occur. Cardiac arrest (sometimes fatal) and/or respiratory
paralysis can occur at plasma levels of 10-15 meq/l. For acute or short term
repeated exposures to magnesium;
鈥? Symptomatic hypermagnesaemia appears rarely in the absence of intestinal or
renal disease.
鈥? Elevated magnesium levels may cause hypocalcaemia because of decreased
parathyroid hormone activity and decreased end-organ responsiveness.
鈥? Patients with severe hypermagnesemia may develop sudden respiratory arrest and
must be watched closely for apnoea.
鈥? Use fluids, then vasopressors for hypotension. Frequently hypotension responds
to calcium administration.
鈥? Induce emesis or administer lavage if patient presents within 4 hours of
ingestion. Use sodium cathartics, with caution, in presence of cardiac or renal
failure.
鈥? Activated charcoal is not useful.
鈥? Calcium is an antagonist of magnesium action and is an effective antidote when
serum levels exceed 5MEg/L and the patient exhibits symptoms The adult dose of
calcium gluconate is 10 ml of a 10% solution over several minutes. [Ellenhorn
and Barceloux: Medical Toxicology].
Section 5 - FIRE FIGHTING MEASURES
EXTINGUISHING MEDIA
Use extinguishing media suitable for surrounding area.
FIRE FIGHTING
Alert Fire Brigade and tell them location and nature of hazard.
鈥? Wear breathing apparatus plus protective gloves.
鈥? Prevent, by any means available, spillage from entering drains or water
courses.
If safe to do so, remove containers from path of fire.
FIRE/EXPLOSION HAZARD
鈥? Non combustible.
鈥? Not considered a significant fire risk, however containers may burn.
FIRE INCOMPATIBILITY
No known incompatibility with normal range of industrial materials.
HAZCHEM
None
Section 6 - ACCIDENTAL RELEASE MEASURES
EMERGENCY PROCEDURES
MINOR SPILLS
Clean up all spills immediately.
Wear impervious gloves and safety glasses.
Avoid generating and breathing dust.
Vacuum up or sweep up.
Place in suitable containers for disposal.
MAJOR SPILLS
Clear area of personnel and move upwind.
鈥? Wear breathing apparatus plus protective gloves.
鈥? Prevent, by any means available, spillage from entering drains or water
MAGNESIUM OXIDE
Chemwatch Material Safety Data Sheet
Issue Date: 24-Jun-2005 CHEMWATCH 10217
A317TC CD 2006/2 Page 4 of 9
Section 6 - ACCIDENTAL RELEASE MEASURES
courses.
Use dry clean up procedures and avoid generating dust.
Recover uncontaminated product in clean, dry, labelled containers.
Place spilled material in clean, dry, sealable, labelled container.
Wash spill area with large quantities of water.
EMERGENCY RESPONSE PLANNING GUIDELINES (ERPG)
The maximum airborne concentration below which it is believed that nearly all
individuals could be exposed for up to one hour WITHOUT experiencing or developing
life-threatening health effects is:
magnesium oxide 500 mg/m鲁
irreversible or other serious effects or symptoms which could
impair an individual's ability to take protective action is:
magnesium oxide 50 mg/m鲁
other than mild, transient adverse effects
without perceiving a clearly defined odour is:
magnesium oxide 30 mg/m鲁
The threshold concentration below which most people.
will experience no appreciable risk of health effects:
magnesium oxide 10 mg/m鲁
American Industrial Hygiene Association (AIHA)
Ingredients considered according to the following cutoffs
Very Toxic (T+) >= 0.1% Toxic (T) >= 3.0%
R50 >= 0.25% Corrosive (C) >= 5.0%
R51 >= 2.5%
else >= 10%
where percentage is percentage of ingredient found in the mixture
SAFE STORAGE WITH OTHER CLASSIFIED CHEMICALS
___________________________________________
+ + + + + +
___________________________________________
+: May be stored together
O: May be stored together with specific preventions
X: Must not be stored together
Personal Protective Equipment advice is contained in Section 8 of the MSDS.
Section 7 - HANDLING AND STORAGE
PROCEDURE FOR HANDLING
Avoid generating and breathing dust.
鈥? Limit all unnecessary personal contact.
鈥? Wear protective clothing when risk of exposure occurs.
鈥? Use in a well-ventilated area.
鈥? When handling DO NOT eat, drink or smoke.
鈥? Always wash hands with soap and water after handling.
鈥? Avoid physical damage to containers.
鈥? Use good occupational work practice.
MAGNESIUM OXIDE
Chemwatch Material Safety Data Sheet
Issue Date: 24-Jun-2005 CHEMWATCH 10217
A317TC CD 2006/2 Page 5 of 9
Section 7 - HANDLING AND STORAGE
鈥? Observe manufacturer's storing and handling recommendations.
SUITABLE CONTAINER
Multi ply paper bag with sealed plastic liner or heavy gauge plastic bag
NOTE: Bags should be stacked, blocked, interlocked, and limited in height so
that they are stable and secure against sliding or collapse. Check that all
containers are clearly labelled and free from leaks. Packing as recommended by
manufacturer.
Metal can or Metal drum.
STORAGE INCOMPATIBILITY
Keep dry.
STORAGE REQUIREMENTS
鈥? Keep dry.
鈥? Store under cover.
鈥? Protect containers against physical damage.
鈥? Observe manufacturer's storing and handling recommendations.
Section 8 - EXPOSURE CONTROLS / PERSONAL PROTECTION
EXPOSURE CONTROLS
Source Material TWA TWA STEL STEL Peak Peak
ppm mg/m鲁 ppm m5/m鲁 ppm mg/m鲁
_________________________ ________________ _____ _____ _____ _____ _____ _____
Australia Exposure magnesium oxide 10
Standards
EMERGENCY EXPOSURE LIMITS
Material Original IDLH Original IDLH Revised IDLH Value Revised IDLH Value
Value (ppm) Value (mg/m3) (mg/m3) (ppm)
magnesium oxide N.E. N.E. 750
Not available. Refer to individual constituents.
PERSONAL PROTECTION
EYE
鈥? Safety glasses with side shields; or as required,
鈥? Chemical goggles.
鈥? Contact lenses may pose a special hazard; soft contact lenses may absorb and
concentrate irritants. A written policy document, describing the wearing of lens
or restrictions on use, should be created for each workplace or task. This
should include a review of lens absorption and adsorption for the class of
chemicals in use and an account of injury experience. Medical and first-aid
personnel should be trained in their removal and suitable equipment should be
readily available. In the event of chemical exposure, begin eye irrigation
immediately and remove contact lens as soon as practicable. Lens should be
removed at the first signs of eye redness or irritation - lens should be removed
in a clean environment only after workers have washed hands thoroughly. [CDC
MAGNESIUM OXIDE
Chemwatch Material Safety Data Sheet
Issue Date: 24-Jun-2005 CHEMWATCH 10217
A317TC CD 2006/2 Page 6 of 9
Section 8 - EXPOSURE CONTROLS / PERSONAL PROTECTION
NIOSH Current Intelligence Bulletin 59].
HANDS/FEET
鈥? Barrier cream and Cotton gloves or PVC gloves.
Safety footwear.
OTHER
鈥? Overalls.
鈥? Eyewash unit.
RESPIRATOR
Protection Factor Half-Face Full-Face Powered Air
Respirator Respirator Respirator
10 x ES P1 Air-line* -- PAPR-P1 -
50 x ES Air-line** P2 PAPR-P2
100 x ES - P3 -
Air-line* -
100+ x ES - Air-line** PAPR-P3
* - Negative pressure demand ** - Continuous flow.
The local concentration of material, quantity and
conditions of use determine the type of personal
protective equipment required.
For further information consult site specific
CHEMWATCH data (if available), or your
Occupational Health and Safety Advisor.
ENGINEERING CONTROLS
Use in a well-ventilated area.
鈥? Local exhaust ventilation is required where solids are handled as powders or
crystals; even when particulates are relatively large, a certain proportion will
be powdered by mutual friction.
鈥? Exhaust ventilation should be designed to prevent accumulation and
recirculation of particulates in the workplace.
鈥? If in spite of local exhaust an adverse concentration of the substance in air
could occur, respiratory protection should be considered. Such protection might
consist of:
(a): particle dust respirators, if necessary, combined with an absorption
cartridge;
(b): filter respirators with absorption cartridge or canister of the right type;
(c): fresh-air hoods or masks
鈥? Build-up of electrostatic charge on the dust particle, may be prevented by
bonding and grounding.
鈥? Powder handling equipment such as dust collectors, dryers and mills may
require additional protection measures such as explosion venting.
Air contaminants generated in the workplace possess varying "escape" velocities
which, in turn, determine the "capture velocities" of fresh circulating air
required to efficiently remove the contaminant.
Type of Contaminant: Air Speed:
direct "spray " spray painting in 1-2.5 m/s (200-500 f/min.)
shallow "booths " drum "filling "
conveyer "loading " crusher "dusts "
gas discharge (active generation into
zone of rapid air motion)
grinding " abrasive "blasting " 2.5-10 m/s (500-2000 f/min.)
"tumbling " high speed wheel generated
dusts (released at high initial
velocity into zone of very high rapid
MAGNESIUM OXIDE
Chemwatch Material Safety Data Sheet
Issue Date: 24-Jun-2005 CHEMWATCH 10217
A317TC CD 2006/2 Page 7 of 9
Section 8 - EXPOSURE CONTROLS / PERSONAL PROTECTION
air motion).
Within each range the appropriate value depends on:
Lower end of the range Upper end of the range
1: Room air currents minimal or 1: Disturbing room air currents
favourable to capture
2: Contaminants of low toxicity or of 2: Contaminants of high toxicity
nuisance value only
3: Intermittent, low production. 3: High production, heavy use
4: Large hood or large air mass in 4: Small hood-local control only
motion
Simple theory shows that air velocity falls rapidly with distance away from the
opening of a simple extraction pipe. Velocity generally decreases with the
square of distance from the extraction point (in simple cases). Therefore the
air speed at the extraction point should be adjusted, accordingly, after
reference to distance from the contaminating source. The air velocity at the
extraction fan, for example, should be a minimum of 4-10 m/s (800-2000 f/min)
for extraction of crusher dusts generated 2 metres distant from the extraction
point. Other mechanical considerations, producing performance deficits within
the extraction apparatus, make it essential that theoretical air velocities are
multiplied by factors of 10 or more when extraction systems are installed or
used.
Section 9 - PHYSICAL AND CHEMICAL PROPERTIES
APPEARANCE
Fine white odourless powder; insoluble in water. Mild alkaline reaction.
Soluble in dilute acids and ammonium salts. Insoluble in alcohol.
Available as Dense and Light grades; with Bulk density 0.20-0.90
Solubility in water @ 30 deg.C: 0.0086 g/100 cc.
PHYSICAL PROPERTIES
Solid.
Molecular Weight: 40.30 Boiling Range (掳C): 3600
Melting Range (掳C): 2852 Specific Gravity (water=1): 3.58 @ 25 deg.C
Solubility in water (g/L): Insoluble 0.001% pH (as supplied): Not applicable
pH (1% solution): Saturated = 10.3 Vapour Pressure (kPa): Not applicable
Volatile Component (%vol): Not applicable. Evaporation Rate: Not applicable
Relative Vapour Density (air=1): Not applicable Flash Point (掳C): Non flammable
Lower Explosive Limit (%): Not applicable Upper Explosive Limit (%): Not applicable
Autoignition Temp (掳C): Not available. Decomposition Temp (掳C): Not available.
State: Divided solid Viscosity: Not available
Section 10 - CHEMICAL STABILITY AND REACTIVITY INFORMATION
CONDITIONS CONTRIBUTING TO INSTABILITY
鈥? Presence of incompatible materials.
鈥? Product is considered stable.
鈥? Hazardous polymerisation will not occur.
MAGNESIUM OXIDE
Chemwatch Material Safety Data Sheet
Issue Date: 24-Jun-2005 CHEMWATCH 10217
A317TC CD 2006/2 Page 8 of 9
Section 11 - TOXICOLOGICAL INFORMATION
POTENTIAL HEALTH EFFECTS
ACUTE HEALTH EFFECTS
SWALLOWED
Considered an unlikely route of entry in commercial/industrial environments.
The material is regarded as practically non-toxic but may be harmful if
swallowed in large quantity Magnesium salts are generally absorbed so slowly
that oral administration causes few toxic effects with purging being the most
significant. If evacuation fails due to bowel obstruction or atony, mucosal
irritation and absorption may result.
Systemically the magnesium ion produces electrolyte imbalance, central nervous
system depression, neurological and cardiac involvement, reflex abolition and
death from respiratory paralysis. These effects are rare in the absence of
intestinal or renal disorders.
Early signs and symptoms of magnesium intoxication include nausea, vomiting,
malaise and confusion. Deep tendon reflexes may be diminished. central nervous
system depression may progress to coma and paralysis of the release of
acetylcholine at myoneuronal junctions. Central nervous system depression may be
compounded by depressed function of the respiratory musculature. Hypotension may
also ensue as a result of
peripheral vasodilation and/ or decreased cardiac output secondary to conduction
defects. Bradycardia is common, leading to eventual arrest in diastole.
EYE
The dust may be discomforting and may be abrasive to the eyes and is capable of
causing a mild, temporary redness of the conjunctiva (similar to wind-burn),
temporary impairment of vision and/ or other transient eye damage/ ulceration.
SKIN
The material may be mildly discomforting.
and may cause drying of the skin.
if exposure is prolonged.
INHALED
Generated dust may be discomforting to the upper respiratory tract if inhaled.
CHRONIC HEALTH EFFECTS
Principal routes of exposure are usually by. inhalation of generated dust and
skin contact. As with any chemical product, contact with unprotected bare skin;
inhalation of vapour, mist or dust in work place atmosphere; or ingestion in any
form, should be avoided by observing good occupational work practice.
TOXICITY AND IRRITATION
TOXICITY IRRITATION
Inhalation (human) TCLo: 400 mg/m鲁 Nil Reported
Section 12 - ECOLOGICAL INFORMATION
MAGNESIUM OXIDE
Chemwatch Material Safety Data Sheet
Issue Date: 24-Jun-2005 CHEMWATCH 10217
A317TC CD 2006/2 Page 9 of 9
Section 13 - DISPOSAL CONSIDERATIONS
Recycle wherever possible.
Bury residue in an authorised landfill.
Section 14 - TRANSPORTATION INFORMATION
HAZCHEM
None
NOT REGULATED FOR TRANSPORT OF DANGEROUS GOODS:UN,IATA,IMDG
Section 15 - REGULATORY INFORMATION
POISONS SCHEDULE
None
REGULATIONS
magnesium oxide (CAS: 1309-48-4) is found on the following regulatory lists;
Australia High Volume Industrial Chemical List (HVICL)
Australia Inventory of Chemical Substances (AICS)
International Council of Chemical Associations (ICCA) - High Production Volume
List
OECD Representative List of High Production Volume (HPV) Chemicals
Section 16 - OTHER INFORMATION
This document is copyright. Apart from any fair dealing for the purposes of
private study, research, review or criticism, as permitted under the Copyright
Act, no part may be reproduced by any process without written permission from
CHEMWATCH. TEL (+61 3) 9572 4700.
Issue Date: 24-Jun-2005
Print Date: 28-Jun-2006
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