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PARALDEHYDEICSC: 1042
August 2002
CAS #: 123-63-7p-Acetaldehyde
Paracetaldehyde
2,4,6-Trimethyl-1,3,5-trioxane
UN #: 1264
EINECS #: 204-639-8

  ACUTE HAZARDS PREVENTION FIRE FIGHTING
FIRE & EXPLOSION Highly flammable.  Above 24°C explosive vapour/air mixtures may be formed.  NO open flames, NO sparks and NO smoking.  Above 24°C use a closed system, ventilation and explosion-proof electrical equipment.  Use water spray, alcohol-resistant foam, dry powder, carbon dioxide.  In case of fire: keep drums, etc., cool by spraying with water. 

   
  SYMPTOMS ACUTE HAZARDS FIRST AID
Inhalation Burning sensation. Cough. Shortness of breath. Further see Ingestion.  Use ventilation, local exhaust or breathing protection.  Fresh air, rest. Refer for medical attention. 
Skin Redness. Pain.  Protective gloves.  Remove contaminated clothes. Rinse and then wash skin with water and soap. 
Eyes Redness. Pain.  Wear safety spectacles 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 in the throat and chest. Nausea. Vomiting. Diarrhoea. Drowsiness. Unconsciousness.  Do not eat, drink, or smoke during work.  Do NOT induce vomiting. Give one or two glasses of water to drink. Refer for medical attention . 

SPILLAGE DISPOSAL CLASSIFICATION & LABELLING
Remove all ignition sources. Personal protection: filter respirator for organic gases and vapours adapted to the airborne concentration of the substance. Collect leaking and spilled liquid in sealable non-plastic containers as far as possible. Absorb remaining liquid in sand or inert absorbent. Then store and dispose of according to local regulations. 

According to UN GHS Criteria

 

Transportation
UN Classification
UN Hazard Class: 3; UN Pack Group: III 

STORAGE
Fireproof. Separated from food and feedstuffs, bases and oxidants. 
PACKAGING
Do not transport with food and feedstuffs. 
PARALDEHYDE ICSC: 1042
PHYSICAL & CHEMICAL INFORMATION

Physical State; Appearance
COLOURLESS LIQUID WITH CHARACTERISTIC ODOUR. 

Physical dangers
The vapour is heavier than air and may travel along the ground; distant ignition possible. 

Chemical dangers
Decomposes on heating. This produces toxic fumes. Decomposes under the influence of air and light. Reacts with bases and oxidants. Attacks plastics. 

Formula: C6H12O3
Molecular mass: 132.2
Boiling point: 124.5°C
Melting point: 12.6°C
Density: 0.99 g/cm³
Solubility in water, g/100ml at 13°C: 12
Vapour pressure, kPa at 20°C: 1
Relative vapour density (air = 1): 4.5
Flash point: 24°C c.c.
Auto-ignition temperature: 235°C
Explosive limits, vol% in air: 1.3-17.0
Octanol/water partition coefficient as log Pow: 0.67  


EXPOSURE & HEALTH EFFECTS

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

Effects of short-term exposure
The substance is irritating to the eyes, skin and respiratory tract. The substance may cause effects on the central nervous system. 

Inhalation risk
No indication can be given about the rate at which a harmful concentration of this substance in the air is reached on evaporation at 20°C. 

Effects of long-term or repeated exposure
The substance may have effects on the nervous system. This may result in addiction. The substance may have effects on the kidneys and liver. This may result in impaired functions. 


Occupational exposure limits
 

ENVIRONMENT
 

NOTES
 

ADDITIONAL INFORMATION
  EC Classification
Symbol: F; R: 11; S: (2)-9-16-29-33 

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    See Also:
       Toxicological Abbreviations