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DICYCLOPENTADIENEICSC: 0873
3a,4,7,7a-Tetrahydro-4,7-methanoindene
3a,4,7,7a-Tetrahydro-4,7-methano-1H-indene
1,3-Dicyclopentadiene
October 2005
CAS #: 77-73-6
UN #: 2048
EC Number: 201-052-9

  ACUTE HAZARDS PREVENTION FIRE FIGHTING
FIRE & EXPLOSION Flammable.  Above 32°C explosive vapour/air mixtures may be formed.  NO open flames, NO sparks and NO smoking.  Above 32°C use a closed system, ventilation and explosion-proof electrical equipment.  Use water in large amounts, foam, carbon dioxide, powder.  In case of fire: keep drums, etc., cool by spraying with water. 

   
  SYMPTOMS PREVENTION FIRST AID
Inhalation Cough. Sore throat. Headache.  Use ventilation (not if powder), local exhaust or breathing protection.  Fresh air, rest. 
Skin Redness. Pain.  Protective gloves.  Remove contaminated clothes. Rinse and then wash skin with water and soap. 
Eyes Redness. Pain.  Wear safety goggles.  First rinse with plenty of water for several minutes (remove contact lenses if easily possible), then refer for medical attention. 
Ingestion Abdominal pain. Nausea.  Do not eat, drink, or smoke during work.  Rinse mouth. Refer for medical attention . 

SPILLAGE DISPOSAL CLASSIFICATION & LABELLING
Remove all ignition sources. Personal protection: filter respirator for organic gases and particulates adapted to the airborne concentration of the substance. Do NOT let this chemical enter the environment. Sweep spilled substance into covered sealable containers. Then store and dispose of according to local regulations. 

According to UN GHS Criteria

 

Transportation
UN Classification
UN Hazard Class: 3; UN Pack Group: III 

STORAGE
Store only if stabilized. Store in an area without drain or sewer access. Fireproof. Cool. Keep in the dark. Separated from strong oxidants. 
PACKAGING
 
DICYCLOPENTADIENE ICSC: 0873
PHYSICAL & CHEMICAL INFORMATION

Physical State; Appearance
COLOURLESS CRYSTALS WITH CHARACTERISTIC ODOUR. 

Physical dangers
 

Chemical dangers
The substance can form explosive peroxides. Decomposes above 170°C . Reacts with oxidants. 

Formula: C10H12
Molecular mass: 132.2
Decomposes at 170-172°C
Melting point: 32-34°C
Density: 0.98 g/cm³
Solubility in water, g/100ml at 25°C: 0.002
Vapour pressure, Pa at 20°C: 180
Relative vapour density (air = 1): 4.6-4.7
Relative density of the vapour/air-mixture at 20°C (air = 1): 1.01
Flash point: 32°C o.c.
Auto-ignition temperature: 503°C
Explosive limits, vol% in air: 0.8-6.3
Octanol/water partition coefficient as log Pow: 2.78  


EXPOSURE & HEALTH EFFECTS

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

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

Inhalation risk
A harmful contamination of the air will be reached rather slowly on evaporation of this substance at 20°C; on spraying or dispersing, however, much faster. 

Effects of long-term or repeated exposure
 


OCCUPATIONAL EXPOSURE LIMITS
TLV: 5 ppm as TWA.
MAK: 2.7 mg/m3, 0.5 ppm; peak limitation category: I(1); pregnancy risk group: D 

ENVIRONMENT
The substance is toxic to aquatic organisms. 

NOTES
An added stabilizer or inhibitor can influence the toxicological properties of this substance, consult an expert.
Check for peroxides prior to distillation; eliminate if found.
Other melting points: 11-13°C for technical product. 

ADDITIONAL INFORMATION
  EC Classification
Symbol: F, Xn, N; R: 11-20/22-36/37/38-51/53; S: (2)-36/37-61 

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    See Also:
       Toxicological Abbreviations
       Dicyclopentadiene  (SIDS)