International Chemical Safety Cards

MAGNESIUM CARBONATE

ICSC: 0969

MgCO₃
Molecular mass: 84.3
ICSC # 0969
CAS # 546-93-0
RTECS # OM2470000
May 06, 2010 Validated
Ju, 010 IPCS checked incl GHS

TYPES OF HAZARD/ EXPOSURE	ACUTE HAZARDS/ SYMPTOMS	PREVENTION	FIRST AID/ FIRE FIGHTING
FIRE	Not combustible. Gives off irritating or toxic fumes (or gases) in a fire.		In case of fire in the surroundings: all extinguishing agents allowed.
EXPLOSION

EXPOSURE
•INHALATION	Cough.	Avoid inhalation of fine dust and mist. Local exhaust or breathing protection.	Fresh air, rest.
•SKIN		Protective gloves.	Rinse skin with plenty of water or shower.
•EYES		Safety spectacles.	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 covered containers; if appropriate, moisten first to prevent dusting.

Separated from acids.

No hazard classification according to GHS criteria

SEE IMPORTANT INFORMATION ON BACK

ICSC: 0969

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 CARBONATE

ICSC: 0969

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A

PHYSICAL STATE; APPEARANCE:
WHITE POWDER.

PHYSICAL DANGERS:

CHEMICAL DANGERS:
The substance decomposes on heating producing irritating fumes. Reacts with

OCCUPATIONAL EXPOSURE LIMITS:
TLV: 10 mg/mł as TWA (ACGIH 2010).
MAK not established.
OSHA PEL: TWA 15 mg/m³ (total) TWA 5 mg/m³ (resp)
NIOSH REL: TWA 10 mg/m³ (total) TWA 5 mg/m³ (resp)
NIOSH IDLH: N.D. See: IDLH INDEX

ROUTES OF EXPOSURE:
The substance can be absorbed into the body by inhalation.

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

EFFECTS OF SHORT-TERM EXPOSURE:

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

PHYSICAL
PROPERTIES

Decomposes at 350 °C
Relative density (water = 1): 2.95

Solubility in water, g/100 ml at 20°C: 0.01 (very poor)

ENVIRONMENTAL
DATA

N O T E S

Magnesite (CAS 7760-50-1) is naturally occuring magnesium carbonate mineral. Magnesite can contain crystalline silica, see ICSC 0808.

ADDITIONAL INFORMATION

ICSC: 0969	MAGNESIUM CARBONATE
(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.