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MAGNESIUM OXIDE

ICSC: 0504

Calcined brucite
Calcined magnesia
Magnesia
MgO
Molecular mass: 40.3
ICSC # 0504 		CAS # 1309-48-4
RTECS # OM3850000
September 04, 1997 Validated

TYPES OF HAZARD/ EXPOSURE

ACUTE HAZARDS/ SYMPTOMS

PREVENTION

FIRST AID/
FIRE FIGHTING

FIRE Not combustible.
NO contact with halogens or strong acids.
In case of fire in the surroundings: all extinguishing agents allowed.
EXPLOSION


EXPOSURE
PREVENT DISPERSION OF DUST!

•INHALATION Cough. See Notes.
Local exhaust or breathing protection.
Fresh air, rest.
•SKIN

Remove contaminated clothes. Rinse skin with plenty of water or shower.
•EYES Redness. Pain.
Safety goggles, or eye protection in combination with breathing protection.
First rinse with plenty of water for several minutes (remove contact lenses if easily possible), then take to a doctor.
•INGESTION Diarrhoea.
Do not eat, drink, or smoke during work.
Rinse mouth. Refer for medical attention.

SPILLAGE DISPOSAL

STORAGE

PACKAGING & LABELLING

Sweep spilled substance into containers; if appropriate, moisten first to prevent dusting. Wash away remainder with plenty of water (extra personal protection: P1 filter respirator for inert particles).
Separated from strong acids, halogens. Dry.

ICSC: 0504 Prepared in the context of cooperation between the International Programme on Chemical Safety & the Commission of the European Communities (C) IPCS CEC 1994. No modifications to the International version have been made except to add the OSHA PELs, NIOSH RELs and NIOSH IDLH values.

MAGNESIUM OXIDE

ICSC: 0504

I

M

P

O

R

T

A

N

T


D

A

T

A

PHYSICAL STATE; APPEARANCE:
HYGROSCOPIC, FINE, WHITE POWDER.

PHYSICAL DANGERS:


CHEMICAL DANGERS:
Reacts violently with halogens and strong acids.

OCCUPATIONAL EXPOSURE LIMITS:
TLV: 10 mg/m3
(Inhalable fraction)
A4 (not classifiable as a human carcinogen); (ACGIH 2006).
MAK: 1.5 mg/m3 (Respirable fraction); 4 mg/m3 (Inhalable fraction).
As magnesium oxide fume :
IIb (not established but data is available) (DFG 2006).
OSHA PEL†: TWA 15 mg/m3
NIOSH REL: See Appendix D
NIOSH IDLH: 750 mg/m3 See: 1309484


ROUTES OF EXPOSURE:
The substance can be absorbed into the body by inhalation of its aerosol or fume and by ingestion.

INHALATION RISK:
Evaporation at 20°C is negligible; a nuisance-causing concentration of airborne particles can, however, be reached quickly when dispersed.

EFFECTS OF SHORT-TERM EXPOSURE:
The substance irritates the eyes and the nose. Inhalation of fume may cause metal fever.

EFFECTS OF LONG-TERM OR REPEATED EXPOSURE:

PHYSICAL
PROPERTIES

Boiling point: 3600°C
Melting point: 2800°C
Relative density (water = 1): 3.6
Solubility in water: poor

ENVIRONMENTAL
DATA


N O T E S

Headache, cough, sweating, nausea and fever may be caused by exposure to freshly formed fumes. The symptoms of metal fume fever do not become manifest until 4-12 hours after exposure. Magcal, Maglite, Magox, Akro-Mag, Animag, Granmag, Magchem 100, Marmag are trade names.
Card has been partially updated in July 2007: see Occupational Exposure Limits.

ADDITIONAL INFORMATION



ICSC: 0504 MAGNESIUM OXIDE
(C) IPCS, CEC, 1994
IMPORTANT LEGAL NOTICE: Neither NIOSH, the CEC or the IPCS nor any person acting on behalf of NIOSH, the CEC or the IPCS is responsible for the use which might be made of this information. This card contains the collective views of the IPCS Peer Review Committee and may not reflect in all cases all the detailed requirements included in national legislation on the subject. The user should verify compliance of the cards with the relevant legislation in the country of use. The only modifications made to produce the U.S. version is inclusion of the OSHA PELs, NIOSH RELs and NIOSH IDLH values.
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