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PROPIONALDEHYDEICSC: 0550
Propionic aldehyde
Methylacetaldehyde
Propanal
Propyl aldehyde
November 2003
CAS #: 123-38-6
UN #: 1275
EC Number: 204-623-0

  ACUTE HAZARDS PREVENTION FIRE FIGHTING
FIRE & EXPLOSION Highly flammable.  Vapour/air mixtures are explosive.  NO open flames, NO sparks and NO smoking.  Closed system, ventilation, explosion-proof electrical equipment and lighting. Do NOT use compressed air for filling, discharging, or handling.  Use water spray, powder, alcohol-resistant foam, carbon dioxide.  In case of fire: keep drums, etc., cool by spraying with water. 

   
  SYMPTOMS PREVENTION FIRST AID
Inhalation Cough. Sore throat.  Use ventilation, local exhaust or breathing protection.  Fresh air, rest. Refer for medical attention. 
Skin Redness. Pain.  Protective gloves.  Remove contaminated clothes. Rinse skin with plenty of water or shower. 
Eyes Redness. Pain.  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.  Do not eat, drink, or smoke during work.  Rinse mouth. 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. Do NOT wash away into sewer. Collect leaking liquid in sealable containers. 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: II 

STORAGE
Fireproof. Separated from acids, bases and oxidants. Cool. Keep in the dark. Store only if stabilized. 
PACKAGING
 
PROPIONALDEHYDE ICSC: 0550
PHYSICAL & CHEMICAL INFORMATION

Physical State; Appearance
COLOURLESS LIQUID WITH PUNGENT ODOUR. 

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

Chemical dangers
The substance can presumably form explosive peroxides. The substance may polymerize under the influence of acids, bases, amines and oxidants. This generates fire or explosion hazard. Decomposes on burning. This produces toxic gases and irritating fumes. 

Formula: C3H6O / CH3CH2CHO
Molecular mass: 58.1
Boiling point: 49°C
Melting point: -81°C
Relative density (water = 1): 0.8
Solubility in water, g/100ml: 20
Vapour pressure, kPa at 20°C: 31.3
Relative vapour density (air = 1): 2.0
Relative density of the vapour/air-mixture at 20°C (air = 1): 1.3
Flash point: -30°C c.c.
Auto-ignition temperature: 207°C
Explosive limits, vol% in air: 2.6-17.0
Octanol/water partition coefficient as log Pow: 0.59  


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 vapour is irritating to the eyes and respiratory tract. The substance is severely irritating to the eyes and skin. 

Inhalation risk
A harmful contamination of the air can be reached very quickly on evaporation of this substance at 20°C. 

Effects of long-term or repeated exposure
 


OCCUPATIONAL EXPOSURE LIMITS
TLV: 20 ppm as TWA 

ENVIRONMENT
 

NOTES
Check for peroxides prior to distillation; eliminate if found.
An added stabilizer or inhibitor can influence the toxicological properties of this substance, consult an expert. 

ADDITIONAL INFORMATION
  EC Classification
Symbol: F, Xi; R: 11-36/37/38; S: (2)-9-16-29 

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    See Also:
       Toxicological Abbreviations
       PROPIONALDEHYDE (JECFA Evaluation)