ICSC 0504 - MAGNESIUM OXIDE

[List of Chemicals] [Risk Notes] [Risk Phrases] [Safety Phrases] [Danger Symbols]

MAGNESIUM OXIDE

ICSC: 0504
_{September 1997}

Calcined brucite
Calcined magnesia
Magnesia

CAS No: 1309-48-4
RTECS No: OM3850000

MgO
Molecular mass: 40.3

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	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).

EMERGENCY RESPONSE	SAFE STORAGE
	Separated from strong acids, halogens. Dry.

IMPORTANT DATA

Physical State; Appearance
HYGROSCOPIC, FINE, WHITE POWDER.

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).

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.

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

NOTES

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.

IPCS
International
Programme on
Chemical Safety

Prepared in the context of cooperation between the International Programme on Chemical Safety and the European Commission
© IPCS 2006

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Updated by AS. Approved by GS. Last update: 29.01.2008