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TEREPHTHALOYL DICHLORIDEICSC: 0331
June 2006
CAS #: 100-20-91.4-benzenedicarbonyl dichloride
terephthalyl dichloride
p-phenylenedicarbonyl dichloride
terephthalic acid dichloride

  ACUTE HAZARDS PREVENTION FIRE FIGHTING
FIRE & EXPLOSION Combustible. Gives off irritating or toxic fumes (or gases) in a fire.  Finely dispersed particles form explosive mixtures in air.  NO open flames.  Closed system, dust explosion-proof electrical equipment and lighting. Prevent deposition of dust.  Use dry sand, powder, carbon dioxide. NO hydrous agents.   

 PREVENT DISPERSION OF DUST!  
  SYMPTOMS ACUTE HAZARDS FIRST AID
Inhalation Cough. Sore throat. Burning sensation. Laboured breathing. Shortness of breath. Symptoms may be delayed. See Notes.  Use local exhaust or breathing protection.  Fresh air, rest. Half-upright position. Refer for medical attention. 
Skin Redness. Pain. Skin burns.  Protective clothing. Protective gloves.  Remove contaminated clothes. Rinse skin with plenty of water or shower. Refer for medical attention . 
Eyes Redness. Pain. Blurred vision. Severe deep burns.  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 Abdominal pain. Nausea. Vomiting. Diarrhoea. Shock or collapse.  Do not eat, drink, or smoke during work.  Rinse mouth. Give one or two glasses of water to drink. Do NOT induce vomiting. Refer for medical attention . 

SPILLAGE DISPOSAL CLASSIFICATION & LABELLING
Personal protection: chemical protection suit and particulate filter respirator adapted to the airborne concentration of the substance. Sweep spilled substance into covered plastic containers. Carefully collect remainder. Then store and dispose of according to local regulations. 

According to UN GHS Criteria

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DANGER
May be harmful if swallowed
Causes severe skin burns and eye damage 

Transportation
UN Classification
 

STORAGE
Separated from strong oxidants. Dry. Well closed. Do NOT store or transport in containers made from metal. 
PACKAGING
 
TEREPHTHALOYL DICHLORIDE ICSC: 0331
PHYSICAL & CHEMICAL INFORMATION

Physical State; Appearance
WHITE POWDER OR COLOURLESS NEEDLES WITH PUNGENT ODOUR. 

Physical dangers
Dust explosion possible if in powder or granular form, mixed with air. 

Chemical dangers
Decomposes on heating. This produces toxic and corrosive fumes. Reacts with strong oxidants. Reacts with water. This produces hydrogen chloride (see ICSC 0163). Attacks many metals in the presence of water. 

Formula: C8H4Cl2O2
Molecular mass: 203.0
Boiling point: 264°C
Melting point: 79.5-84°C
Density: 1.32 g/cm³
Solubility in water: reaction
Vapour pressure, Pa at 20°C: 320
Flash point: 180°C
Octanol/water partition coefficient as log Pow: 0.88 (calculated) 


EXPOSURE & HEALTH EFFECTS

Routes of exposure
Serious by all routes of exposure. 

Effects of short-term exposure
The substance is corrosive to the eyes, skin and respiratory tract. Corrosive on ingestion. Exposure could cause asphyxiation due to swelling in the throat. Inhalation may cause lung oedema. See Notes. 

Inhalation risk
A harmful concentration of airborne particles can be reached quickly when dispersed. 

Effects of long-term or repeated exposure
 


Occupational exposure limits
 

ENVIRONMENT
 

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 are therefore essential. 

ADDITIONAL INFORMATION
  EC Classification
 

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    See Also:
       Toxicological Abbreviations