International Chemical Safety Cards

MAGNESIUM OXIDE ICSC: 0504
World Health Organization (WHO) International Labour Organization (ILO) United Nations Environmental Programme (UNEP) European Commission National Institute for Occupational Safety and Health (NIOSH)
Calcined brucite
Calcined magnesia
Magnesia
MgO
Molecular mass: 40.3
ICSC #    0504
CAS #     1309-48-4
RTECS # OM3850000
May 07, 2010 Validated
Ju, 010 IPCS checked incl GHS
TYPES OF HAZARD/ EXPOSURE ACUTE HAZARDS/ SYMPTOMS PREVENTION FIRST AID/
FIRE FIGHTING
FIRE Not combustible.
NO contact with strong acids.
In case of fire in the surroundings: all extinguishing agents allowed.
EXPLOSION


EXPOSURE
PREVENT DISPERSION OF DUST!

 •INHALATION Cough.
Local exhaust or breathing protection.
Fresh air, rest.
 •SKIN
Protective gloves.
Remove contaminated clothes. Rinse and then wash skin with water and soap.
 •EYES Redness.
Safety goggles or eye protection in combination with breathing protection.
Rinse with plenty of water (remove contact lenses if easily possible).
 •INGESTION
Do not eat, drink, or smoke during work.
Rinse mouth.
SPILLAGE DISPOSAL STORAGE PACKAGING & LABELLING
Personal protection: particulate filter respirator adapted to the airborne concentration of the substance. Sweep spilled substance into containers; if appropriate, moisten first to prevent dusting.
Separated from strong acids. Dry. Well closed.

No hazard classification according to GHS criteria
SEE IMPORTANT INFORMATION ON BACK
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.

International Chemical Safety Cards

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 strong acids .

OCCUPATIONAL EXPOSURE LIMITS:
TLV: 10 mg/m³
(Inhalable fraction)
as TWA A4 (not classifiable as a human carcinogen); (ACGIH 2010).
MAK: 4 mg/m³ (Inhalable fraction) 1.5 mg/m³ (Respirable fraction)
Pregnancy risk group: C
MAK: (MgO fumes) IIb (not established but data is available) (DFG 2009 ).
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 the dust and fumes.

INHALATION RISK:
A nuisance-causing concentration of airborne particles can be reached quickly when dispersed.

EFFECTS OF SHORT-TERM EXPOSURE:
May cause mechanical irritation. o

EFFECTS OF LONG-TERM OR REPEATED EXPOSURE:
Lungs may be affected by repeated or prolonged exposure to dust particles.
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
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.