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Date of Issue : Dec 1999 1. IDENTIFICATION
General Product Name : MAGNESIUM CARBONATE Other Names : CARBONATE MAGNESIUM, MAGNESITE UN No. : N/A Dangerous Goods Class : None Allocated Subsidiary Risk : None Allocated Hazchem Code : N/A Pack Group : 0 EPG : N/A Poisons Schedule : N/A Uses : Magnesium salts, heat insulation & refractory, rubber reinforcing agent, inks, glass, pharmaceuticals, dentifrices & cosmetics, free flowing table salts, antacid, making magnesium citrate, filtering medium. Used in foods as drying agent, colour retention agent, anticaking agent, carrier.
1.1 Physical Description / Properties
Appearance : White odourless powder. Formula : MgCO3 Boiling Point : 900 deg C Melting Point : 350 deg C Vapour Pressure : 0 mm Hg (1 atmosphere) Specific Gravity : 2.958 (water = 1) Flash Point : N/A pH : N/A () Solubility in water : Insol g/l (25 deg C) Flammability Limits (as percentage volume in air) Lower Explosion Limit : N/A Upper Explosion Limit : N/A 1.2 Other Properties
Not combustible. Molecular weight: 84.32. Soluble in acids. Insoluble in alcohol, acetone and ammonia. 1.3 Ingredients
2. HEALTH HAZARD INFORMATION
2.1 Health Effects - Acute Swallowed
Non toxic by ingestion. Some mild temporary discomfort might occur. Ca cause diarrhoea. Eye
Dust is not irritating to eyes except as a 'foreign object'. Some tearing, blinking and mild temporary pain may occur as particles are rinsed from the surface of the eye. Skin
Not absorbed through the skin. Not irritating to the skin, but use of rigorous washing procedures to remove dust may cause skin irritation. Inhaled
Inhalation of nuisance dusts such as magnesium carbonate causes little adverse effect on the lungss and does not produce disease or toxic effects elsewhere in the body. High concentrations of dust may cause coughing and mild temporary irritation. 2.2 Health Effects - Chronic
Long industrial experience with this material has shown that it can cause minor, reversible health effects on the lungs. Long-term exposure to high concentrations of dust may cause increased mucous flow in the nose and resliratory system. This condition usually disappears after exposure ceases. Controversy exists as to the role exposrue to dusts has in the development of chronic bronchitis (inflammation of the air passages into the lungs). Other factors such as smoking and general air pollution are more important, but exposure to dusts may also contribute. Repeated or prolonged exposure to massive concentrations of dust may cause lung injury by blocking some blood vessels and distorting shape of some airways. Not expected to be a carcinogen. No reproductive effects expected. Probably not as mutagen. Will not accumulate.
2.3 First Aid
Swallowed
Rinse mouth with water abd drink a cup of water to minimise discomfort.
Eye
If irritation occurs, flush the contaminated eye(s) with lukewarm, gently flowing water until removed. If irritation persists, obtain immediate medical attention.
Skin
If irritation occurs, wash gently and thoroughly with water and non-abrasive soap.
Inhaled
If symptoms are experienced, remove source of contamination or move victim to fresh air. Seek medical advice.
First Aid Facilities
Ensure an eye bath and safety shower are available and ready for use.
2.5 Advice to Doctor
Treat symptomatically based on individual reactions of patient and judgment of doctor.
2.6 Toxicity Data
No information available.
3. PRECAUTIONS FOR USE
3.1 Exposure Standards
TLV-TWA: 10 mg/m3 (nuisance particulate).
3.2 Engineering Controls
When there is large-scale use of this material (eg. bagging operation), engineering control methods to reduce exposures may be necessary. Use local exhaust ventilation and process enclosure to control airbourne dust. A dust collecting system attached to the ventilation system may also be necessary. Supply sufficient replacement air to make up for air removed by exhaust systems.
3.3 Personal Protection
If engineering controls and work practices are not enough in controlling exposure to this material, then wear suitable personnel protective equipment including approved respiratory protection. If respiratory protection is required, institute a complete respiratory protection program including selection, fit trsting, training, maintenance and inspection. An approved respirator suitable for protection from nuisance dusts may be adequate. The respirator use limitations specified by the approving agency and the manufacturer must be observed. There is no specific requirements to wear eye or face protection but it is good practice to wear chemical safety goggles. Wear coveralls or long sleeves and pants to prevent accumulation of dust on skin.
3.4 Flammability
Non combustible material. SAFE HANDLING INFORMATION
4.1 Storage / Transport
Store in suitable, labelled containers. Keep containers tightly closed when not in use. Protect from damage. Avoid any dust build up by frequent cleaning and suitable construction of sotrage area. Use dust tight containers. Good housekeeping is important to prevent accumulation of dust. Avoid generating dust. Label containers. Keep containers closed when not in use. Keep away from acids.
4.2 Packaging / Labelling UN No. N/A Class None Allocated Sub Risk None Allocated Hazchem Code N/A Pack Group 0 EPG No. N/A Shipping Name MAGNESIUM CARBONATE Hazard
Risk Phrases
Safety Phrases
4.3 Spills and Disposal
Spills
Clean up personnel should wear suitable protective clothing. Restrict access to are until completion of clean up. Ensure clean up is conducted by a trained professional.
Use vacuum equipped with HEPA filter(s). Alternatively, dampen spilled material with water. Shovel into clean, dry, labelled containers. Cover containers. Flush area with water.
Disposal
Review federal, state and local government requirements prior to disposal. Disposal by secure landfill may be acceptable.
4.4 FIRE AND EXPLOSION HAZARD Fire / Explosion
Non combustible material, does not burn.
Extinguishing Media
Firefighters should wear full protective clothing including self contained breathing apparatus. Use extinguishing media appropriate to surrounding fire. 5 OTHER INFORMATION
Other Information
No information available.
5.1 Contact Points
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The information above is believed to be accurate and represents the best information currently available to us. However, we make no warranty of merchantability or any other warranty, express or implied, with respect to such information, and we assume no liability resulting from its use.
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