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CALCIUM OXIDEICSC: 0409
September 1997
CAS #: 1305-78-8Lime
Burnt lime
Quicklime
UN #: 1910
EINECS #: 215-138-9

  ACUTE HAZARDS PREVENTION FIRE FIGHTING
FIRE & EXPLOSION Not combustible.        In case of fire in the surroundings, use appropriate extinguishing media.   

 PREVENT DISPERSION OF DUST! STRICT HYGIENE!  
  SYMPTOMS ACUTE HAZARDS FIRST AID
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 CLASSIFICATION & LABELLING
Personal protection: particulate filter respirator adapted to the airborne concentration of the substance. Sweep spilled substance into covered dry containers. 

According to UN GHS Criteria

 

Transportation
UN Classification
UN Hazard Class: 8; UN Pack Group: III 

STORAGE
Separated from strong acids, organic chemicals, water and food and feedstuffs. Dry. 
PACKAGING
Do not transport with food and feedstuffs. 
CALCIUM OXIDE ICSC: 0409
PHYSICAL & CHEMICAL INFORMATION

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. 

Formula: CaO
Molecular mass: 56.1
Boiling point: 2850°C
Melting point: 2570°C
Relative density (water = 1): 3.3-3.4
Solubility in water: reaction 


EXPOSURE & HEALTH EFFECTS

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

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. 

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

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. 


Occupational exposure limits
TLV: 2 mg/m3, ppm, as TWA.
MAK: (inhalable fraction): 1 mg/m3; peak limitation category: I(2); pregnancy risk group: C.
EU-OEL: 1 mg/m3 as TWA; 4 mg/m3 as STEL 

ENVIRONMENT
 

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. 

ADDITIONAL INFORMATION
  EC Classification
 

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    See Also:
       Toxicological Abbreviations
       CALCIUM OXIDE (JECFA Evaluation)