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BUTYRALDEHYDE
ICSC: 0403
Peer-Review Status: 04.04.2006 Validated
Butanal
Butyl aldehyde 
CAS #: 123-72-8 RTECS #: ES2275000
UN #: 1129
EC #: 605-006-00-2
EINECS #: 204-646-6
    Formula: C4H8O / CH3CH2CH2CHO
Molecular mass: 72.1

TYPES OF
HAZARD /
EXPOSURE
ACUTE HAZARDS / SYMPTOMS      PREVENTION      FIRST AID / FIRE FIGHTING
FIRE Highly flammable.  NO open flames, NO sparks and NO smoking.  Use foam, powder, carbon dioxide. 
EXPLOSION Vapour/air mixtures are explosive.  Closed system, ventilation, explosion-proof electrical equipment and lighting. Do NOT use compressed air for filling, discharging, or handling.  In case of fire: keep drums, etc., cool by spraying with water. 
 
EXPOSURE      
Inhalation Cough. Sore throat.  Use ventilation, local exhaust or breathing protection.  Fresh air, rest. 
Skin Redness.  Protective gloves.  Remove contaminated clothes. Rinse skin with plenty of water or shower. 
Eyes Redness. Pain.  Wear safety spectacles.  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. Rest. 

SPILLAGE DISPOSAL
PACKAGING & LABELLING
Personal protection: filter respirator for organic gases and vapours adapted to the airborne concentration of the substance. Do NOT let this chemical enter the environment. Collect leaking liquid in sealable containers. Absorb remaining liquid in sand or inert absorbent. Then store and dispose of according to local regulations.   
EC Classification
Symbol: F; R: 11; S: (2)-9-29-33 
UN Classification
UN Hazard Class: 3; UN Pack Group: II 
GHS Classification
Signal: Danger
Highly flammable liquid and vapour
May be harmful if swallowed
May be harmful in contact with skin
Causes serious eye irritation
Harmful to aquatic life 
flam;flameexcl mark;warn

EMERGENCY RESPONSE SAFE STORAGE
Transport Emergency Card: TEC (R)-30S1129.
NFPA Code: H3; F3; R0. 
Fireproof. Separated from incompatible materials. See Chemical Dangers. Cool. Keep in the dark. Store in an area without drain or sewer access. 

IMPORTANT DATA
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. Reacts with amines, oxidants, strong bases and acids. 

Occupational exposure limits
TLV (NOT-ESTABLISHED):. 

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

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 short-term exposure
The substance is irritating to the eyes, skin and respiratory tract. 

Effects of long-term or repeated exposure
 


PHYSICAL PROPERTIES ENVIRONMENTAL DATA
Boiling point: 74.8°C
Melting point: -99°C
Density: 0.8 g/cm³
Solubility in water, g/100ml: 7
Vapour pressure, kPa at 20°C: 12.2
Relative vapour density (air = 1): 2.5
Flash point: -12°C c.c.
Auto-ignition temperature: 230°C
Explosive limits, vol% in air: 1.9-12.5
Octanol/water partition coefficient as log Pow: 0.88  
The substance is harmful to aquatic organisms. 

NOTES
Check for peroxides prior to distillation; eliminate if found.
Card has been partially updated in August 2007: see Storage. 

ADDITIONAL INFORMATION
 

IPCS
International
Programme on
Chemical Safety
WHO ILO EC Prepared in the context of cooperation between the International Programme on Chemical Safety and the European Commission
© IPCS 2004-2012
LEGAL NOTICE Neither the EC nor the IPCS nor any person acting on behalf of the EC or the IPCS is responsible for the use which might be made of this information.
    See Also:
       Toxicological Abbreviations
       BUTYRALDEHYDE (JECFA Evaluation)