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DICYCLOPENTADIENE
ICSC: 0873
Peer-Review Status: 19.10.2005 Validated
3a,4,7,7a-Tetrahydro-4,7-methanoindene
3a,4,7,7a-Tetrahydro-4,7-methano-1H-indene
1,3-Dicyclopentadiene 
CAS #: 77-73-6 RTECS #: PC1050000
UN #: 2048
EC #: 601-044-00-9
EINECS #: 201-052-9
    Formula: C10H12
Molecular mass: 132.2

TYPES OF
HAZARD /
EXPOSURE
ACUTE HAZARDS / SYMPTOMS      PREVENTION      FIRST AID / FIRE FIGHTING
FIRE Flammable.  NO open flames, NO sparks and NO smoking.  Use water in large amounts, foam, carbon dioxide, powder. 
EXPLOSION Above 32°C explosive vapour/air mixtures may be formed.  Above 32°C use a closed system, ventilation and explosion-proof electrical equipment.  In case of fire: keep drums, etc., cool by spraying with water. 
 
EXPOSURE      
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
PACKAGING & 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.   
EC Classification
Symbol: F, Xn, N; R: 11-20/22-36/37/38-51/53; S: (2)-36/37-61 
UN Classification
UN Hazard Class: 3; UN Pack Group: III 
GHS Classification
 

EMERGENCY RESPONSE SAFE STORAGE
Transport Emergency Card: TEC (R)-30S2048 or 30GF1-III.
NFPA Code: H3; F3; R1. 
Store only if stabilized. Store in an area without drain or sewer access. Fireproof. Cool. Keep in the dark. Separated from strong oxidants. 

IMPORTANT DATA
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. 

Occupational exposure limits
TLV: 5ppm as TWA; (ACGIH 2005).
MAK: 0.5 ppm, 2.7 mg/m³; Peak limitation category: I(1); Pregnancy risk group: D; (DFG 2008). 

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

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 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
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  
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.
Card has been partially updated in November 2008: see Occupational Exposure Limits. 

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
       Dicyclopentadiene  (SIDS)