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CALCIUM OXIDE
ICSC: 0409
Peer-Review Status: 04.09.1997 Validated
Lime
Burnt lime
Quicklime 
CAS #: 1305-78-8 RTECS #: EW3100000
UN #: 1910
EINECS #: 215-138-9
    Formula: CaO
Molecular mass: 56.1

TYPES OF
HAZARD /
EXPOSURE
ACUTE HAZARDS / SYMPTOMS      PREVENTION      FIRST AID / FIRE FIGHTING
FIRE Not combustible.    In case of fire in the surroundings, use appropriate extinguishing media. 
EXPLOSION      
 
EXPOSURE   PREVENT DISPERSION OF DUST! STRICT HYGIENE!   
Inhalation Burning sensation. Cough. Shortness of breath. Sore throat.  Use local exhaust or breathing protection.  Fresh air, rest. Refer for medical attention. 
Skin Dry skin. Redness. Skin burns. Burning sensation. Pain.  Protective gloves. Protective clothing.  Remove contaminated clothes. Rinse skin with plenty of water or shower. Refer for medical attention . 
Eyes Redness. Pain. Blurred vision. Severe deep burns.  Wear 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 refer for medical attention. 
Ingestion Burning sensation. Abdominal pain. Abdominal cramps. Vomiting. Diarrhoea.  Do not eat, drink, or smoke during work.  Rinse mouth. Do NOT induce vomiting. Give nothing to drink. Refer for medical attention . 

SPILLAGE DISPOSAL
PACKAGING & LABELLING
Personal protection: particulate filter respirator adapted to the airborne concentration of the substance. Sweep spilled substance into covered dry containers.  Do not transport with food and feedstuffs. 
EC Classification
 
UN Classification
UN Hazard Class: 8; UN Pack Group: III 
GHS Classification
 

EMERGENCY RESPONSE SAFE STORAGE
  Separated from strong acids, organic chemicals, water and food and feedstuffs. Dry. 

IMPORTANT DATA
Physical State; Appearance
WHITE HYGROSCOPIC CRYSTALLINE POWDER. 

Physical dangers
 

Chemical dangers
The solution in water is a medium strong base. Reacts with water. This generates sufficient heat to ignite combustible materials. Reacts violently with acids, halogens and metals. 

Occupational exposure limits
TLV: 2mg/m³ as TWA; (ACGIH 2004). 

Routes of exposure
The substance can be absorbed into the body by inhalation of its aerosol and by ingestion. 

Inhalation risk
Evaporation at 20°C is negligible; a harmful concentration of airborne particles can, however, be reached quickly when dispersed. 

Effects of short-term exposure
The substance is corrosive to the eyes, skin and respiratory tract. The effects may be delayed. Medical observation is indicated. 

Effects of long-term or repeated exposure
Repeated or prolonged contact with skin may cause dermatitis. Repeated or prolonged inhalation of dust particles may cause effects on the lungs. Repeated or prolonged inhalation may cause nasal ulceration. This may result in perforation of the nasal septum. 


PHYSICAL PROPERTIES ENVIRONMENTAL DATA
Boiling point: 2850°C
Melting point: 2570°C
Relative density (water = 1): 3.3-3.4
Solubility in water: reaction 
 

NOTES
Reacts violently with fire extinguishing agents such as water.
Clumps of calcium oxide formed by reaction with moisture and proteins in the eye are difficult to remove by irrigation.
Manual removal by a physician is necessary.
NEVER pour water into this substance; when dissolving or diluting always add it slowly to the water.
Card has been partly updated in October 2005.
See sections Occupational Exposure Limits, Emergency Response. 

ADDITIONAL INFORMATION
 

IPCS
International
Programme on
Chemical Safety
WHO ILO EC Prepared in the context of cooperation between the International Programme on Chemical Safety and the European Commission
© IPCS 2004-2012
LEGAL NOTICE Neither the EC nor the IPCS nor any person acting on behalf of the EC or the IPCS is responsible for the use which might be made of this information.


    See Also:
       Toxicological Abbreviations
       CALCIUM OXIDE (JECFA Evaluation)