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TEREPHTHALOYL DICHLORIDE
ICSC: 0331
Peer-Review Status: 04.06.2006 Validated
1.4-benzenedicarbonyl dichloride
terephthalyl dichloride
p-phenylenedicarbonyl dichloride
terephthalic acid dichloride 
CAS #: 100-20-9 RTECS #: WZ1797000
EC #: 202-829-5
    Formula: C8H4Cl2O2
Molecular mass: 203.0

TYPES OF
HAZARD /
EXPOSURE
ACUTE HAZARDS / SYMPTOMS      PREVENTION      FIRST AID / FIRE FIGHTING
FIRE Combustible. Gives off irritating or toxic fumes (or gases) in a fire.  NO open flames.  Use dry sand, powder, carbon dioxide. NO hydrous agents. 
EXPLOSION Finely dispersed particles form explosive mixtures in air.  Closed system, ventilation, explosion-proof electrical equipment and lighting. Prevent deposition of dust.   
 
EXPOSURE   PREVENT DISPERSION OF DUST!   
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
PACKAGING & 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.   
EC Classification
 
UN Classification
 
GHS Classification
Signal: Danger
May be harmful if swallowed
Causes severe skin burns and eye damage 
corr

EMERGENCY RESPONSE SAFE STORAGE
NFPA Code: H3; F1; R; 0.  Separated from strong oxidants. Dry. Well closed. Do NOT store or transport in containers made from metal. 

IMPORTANT DATA
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. 

Occupational exposure limits
TLV (NOT-ESTABLISHED):. 

Routes of exposure
Serious by all routes of exposure. 

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

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. 

Effects of long-term or repeated exposure
 


PHYSICAL PROPERTIES ENVIRONMENTAL DATA
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) 
 

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. 

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