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DIPHOSGENE
ICSC: 1630
Peer-Review Status: 19.04.2007 Validated
Formic acid, trichloro-methyl ester
Trichloromethyl chloroformate 
CAS #: 503-38-8 RTECS #: LQ7350000
EINECS #: 207-965-9
    Formula: ClCOOCCl3
Molecular mass: 197.83

TYPES OF
HAZARD /
EXPOSURE
ACUTE HAZARDS / SYMPTOMS      PREVENTION      FIRST AID / FIRE FIGHTING
FIRE Not combustible.    In case of fire in the surroundings, use appropriate extinguishing media. 
EXPLOSION      
 
EXPOSURE   STRICT HYGIENE!   
Inhalation Burning sensation. Chest tightness. Sore throat. Cough. Laboured breathing. Shortness of breath. Symptoms may be delayed. See Notes.  Use breathing protection. Use closed system or ventilation.  Fresh air, rest. Half-upright position. Artificial respiration may be needed. Refer for medical attention. 
Skin Redness.  Protective gloves.  Rinse and then wash skin with water and soap. 
Eyes Watering of the eyes. Redness.  Wear safety goggles.  First rinse with plenty of water for several minutes (remove contact lenses if easily possible), then refer for medical attention. 
Ingestion Sore throat.  Do not eat, drink, or smoke during work.  Rinse mouth. 

SPILLAGE DISPOSAL
PACKAGING & LABELLING
Personal protection: chemical protection suit including self-contained breathing apparatus. Collect leaking and spilled liquid in sealable containers as far as possible. Absorb remaining liquid in sand or inert absorbent. Then store and dispose of according to local regulations.   
EC Classification
 
UN Classification
 
GHS Classification
Signal: Danger
Fatal if inhaled vapour
May cause respiratory irritation 
skull;toxic

EMERGENCY RESPONSE SAFE STORAGE
  Dry. Well closed. Keep in a well-ventilated room. 

IMPORTANT DATA
Physical State; Appearance
COLOURLESS LIQUID WITH CHARACTERISTIC ODOUR. 

Physical dangers
The vapour is heavier than air. 

Chemical dangers
Decomposes on heating. This produces toxic and corrosive fumes including chlorine and phosgene. Reacts with water. This produces toxic and corrosive fumes. 

Occupational exposure limits
TLV (NOT-ESTABLISHED):. 

Routes of exposure
The substance can be absorbed into the body in hazardous amounts by inhalation. 

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

Effects of short-term exposure
The substance is irritating to the respiratory tract, skin and eyes. Lachrymation. Inhalation of of may cause lung oedema. See Notes. 

Effects of long-term or repeated exposure
 


PHYSICAL PROPERTIES ENVIRONMENTAL DATA
Boiling point at 101.3 kPa: 128°C
Melting point: -57°C
Density: 1.6 g/cm³
Solubility in water: reaction
Vapour pressure, kPa at 20°C: 1.3
Relative vapour density (air = 1): 6.83
Relative density of the vapour/air-mixture at 20°C (air = 1): 1.08
Octanol/water partition coefficient as log Pow: 1.49  
 

NOTES
The symptoms of lung oedema often do not become manifest until a few hours have passed and they are aggravated by physical effort.
Rest and medical observation is therefore essential.
See Phosgene ICSC0007. 

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