ABC of Safety in the Biological Sciences
CALCIUM OXIDE (CaO)
SYNONYMS
Lime, burnt lime, quick lime.
CHARACTERISTICS
White hygroscopic powder with pungent odour, reacts violently
with water and acids generating heat.
INCOMPATIBILITY
Acids and water.
HEALTH HAZARD DATA
Is corrosive to eyes, skin and respiratory tract. Inhalation
causes sore throat, coughing, shortness of breath, laboured
breathing and may cause lung oedema. Skin and eye contact are
corrosive causing redness, pain and burns. Ingestion is
corrosive causing sore throat, abdominal pain and diarrhoea.
HANDLING and GENERAL PRECAUTIONS
Use a fume hood.
Avoid skin and eye contact.
Avoid inhalation or ingestion of the powder.
Keep away from moisture.
Keep the container tightly sealed.
Keep away from acids.
Wash hands thoroughly after handling.
Use a fume hood to minimise exposure to this substance. Wear
protective clothing to avoid skin or eye contact, inhalation or
ingestion. A long sleeved laboratory coat or gown, rubber
gloves, safety goggles and a face mask as a minimum standard.
TREATMENTS
Skin immediately wash the affected area with soap or mild
detergent and large amounts of water until all evidence of the
chemical has been removed (approximately 15 minutes). If
hypersensitivity develops seek medical attention.
Eyes wash the affected eye with large amounts of water until
all evidence of the chemical has been removed (approximately 15
minutes). If irritation or pain persist seek immediate medical
attention.
Inhalation remove from the area of exposure to fresh air. Keep
warm and allow to rest. If irritation persists or signs of
toxicity develop seek medical attention.
Ingestion wash out the mouth thoroughly with water and give
water to drink. Do not induce vomiting. Never give anything by
mouth to an unconscious person. Seek immediate medical advice.
STORAGE
Store in a cool, dry atmosphere away from heat or ignition
sources.
DISPOSAL:
WEAR:
Rubber gloves, large face shield, all purpose or special
canister respirator for ammonia and laboratory coat.
SPILLS:
Solid - sweep up, dilute and neutralise with 6M hydrochloric
acid, in a large bucket. Discharge to sewer with a large excess
of water.
Solution - neutralise and mop up.
PACKAGE LOTS:
Pour into a large tank of water and neutralise. Discharge into
sewer with a large excess of water.
ENVIRONMENT
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