ABC of Safety in the Biological Sciences
ACETALDEHYDE (CH3CHO) UN No. 1089; Hazchem 2YE
SYNONYMS
Acetic aldehyde, ethanal, ethyl aldehyde.
CHARACTERISTICS
Colourless, highly flammable liquid with characteristic,
pungent, fruity odour. Has been known to spontaneously combust
on exposure to the atmosphere, oxygen and hydrogen peroxide.
INCOMPATIBILITY
Reacts violently with acid anhydrides, alcohols, ketones,
phenols, oxidants, halogens and amines. It can react dangerously
with ammonia, hydrogen cyanide and sulphide. It polymerises
exothermically with acetic acid.
HEALTH HAZARD DATA
May be absorbed into the body by inhalation and ingestion.
Irritates the skin, corrosive to eyes and respiratory tract.
Inhalation of vapour or fumes may cause shortness of breath,
sore throat, coughing, laboured breathing and pulmonary oedema.
Affects the central nervous system causing drowsiness,
depression, liver and heart damage. Ingestion causes toxicity.
The acute stage produces severe irritation of the digestive
tract with possible liver and heart damage. The chronic stage
produces delirium, hallucinations and brain damage. Serious
cases may be fatal.
HANDLING and GENERAL PRECAUTIONS
Use a fume hood.
Avoid skin and eye contact.
Avoid inhalation or ingestion of the vapour.
Keep away from heat or naked flames.
Keep away from incompatible substances.
Keep the container tightly sealed.
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 remove contaminated clothing then 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).After irrigation seek immediate medical attention.
Inhalation remove from the area of exposure to fresh air. Keep
warm and allow to rest. Seek immediate 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 incompatible
substances, heat or ignition sources.
DISPOSAL
Extinguish all sources of ignition. Wear rubber gloves, eye
protection, self contained breathing apparatus and laboratory
coat or gown with elasticised wrist bands.
SPILLS: Eliminate all sources of ignition and flammables. Small
- absorb on a paper towel. Evaporate in fume hood and burn the
paper. Large - cover with sodium bisulphite. Add a small amount
of water and mix. Scoop into a large beaker. Discharge to sewer
with a large excess of water. Wash the spill site with a soapy
solution.
PACKAGE LOTS: (Choice of procedures). 1. Absorb on vermiculite.
Burn in an open pit or open incinerator. 2. Dissolve in a
flammable solvent (such as acetone or benzene). Spray into the
fire box of an incinerator equipped with an afterburner.
ENVIRONMENT:
Hazardous to the environment. Spillages must be contained.
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