International Chemical Safety Cards

CYCLOPENTADIENE ICSC: 0857
CYCLOPENTADIENE
1,3-Cyclopentadiene
Pentole
Pyropentylene
C5H6
Molecular mass: 66.1
CAS # 542-92-7
RTECS # GY1000000
ICSC # 0857
UN # 1993
TYPES OF
HAZARD/
EXPOSURE
ACUTE HAZARDS/
SYMPTOMS
PREVENTION FIRST AID/
FIRE FIGHTING
FIRE Flammable.
NO open flames, NO sparks, and NO smoking.
Powder, AFFF, foam, carbon dioxide.
EXPLOSION Above 25C explosive vapour/air mixtures may be formed.
Above 25C use a closed system, ventilation, and explosion-proof electrical equipment.
In case of fire: keep drums, etc., cool by spraying with water.
EXPOSURE
PREVENT GENERATION OF MISTS!

  • INHALATION
  • Cough. Sore throat.
    Ventilation, local exhaust, or breathing protection.
    Fresh air, rest. Refer for medical attention.
  • SKIN

  • Protective gloves.
    Remove contaminated clothes. Rinse and then wash skin with water and soap.
  • EYES
  • Redness. Pain.
    Safety goggles.
    First rinse with plenty of water for several minutes (remove contact lenses if easily possible), then take to a doctor.
  • INGESTION

  • Do not eat, drink, or smoke during work.
    Rinse mouth. Refer for medical attention.
    SPILLAGE DISPOSAL STORAGE PACKAGING & LABELLING
    Collect leaking and spilled liquid in sealable containers as far as possible. Absorb remaining liquid in sand or inert absorbent and remove to safe place (extra personal protection: self-contained breathing apparatus).
    Fireproof. Separated from strong oxidants, strong acids, potassium hydroxide. Cooled. Store only if stabilized.
    Airtight.
    UN Hazard Class: 3
    UN Packing Group: III
    SEE IMPORTANT INFORMATION ON BACK
    ICSC: 0857 Prepared in the context of cooperation between the International Programme on Chemical Safety & the Commission of the European Communities © IPCS CEC 1993

    International Chemical Safety Cards

    CYCLOPENTADIENE ICSC: 0857

    I

    M

    P

    O

    R

    T

    A

    N

    T



    D

    A

    T

    A

    PHYSICAL STATE; APPEARANCE:
    COLOURLESS LIQUID , WITH CHARACTERISTIC ODOUR.

    PHYSICAL DANGERS:
    The vapour is heavier than air.

    CHEMICAL DANGERS:
    The substance can readily form explosive peroxides on contact with air. The substance will readily polymerize to dimer with fire or explosion hazard. The reaction is accelerated by peroxides or trichloroacetic acid. Reacts violently with potassium hydroxide. Reacts violently with strong oxidants and strong acids such as fuming nitric acid and sulfuric acid, causing fire and explosion hazard.

    OCCUPATIONAL EXPOSURE LIMITS (OELs):
    TLV (as TWA): 75 ppm; 203 mg/m3 (ACGIH 1995-1996).


    ROUTES OF EXPOSURE:
    The substance can be absorbed into the body by inhalation.

    INHALATION RISK:
    A harmful contamination of the air can be reached rather quickly on evaporation of this substance at 20C.

    EFFECTS OF SHORT-TERM EXPOSURE:
    The substance irritates the eyes and the respiratory tract.


    PHYSICAL
    PROPERTIES
    Boiling point: 41.5-42.0C
    Melting point: -85C
    Relative density (water = 1): 0.8
    Solubility in water: insoluble
    Relative vapour density (air = 1): 2.3
    Flash point: 25C o.c.
    Auto-ignition temperature: 640C
    ENVIRONMENTAL
    DATA

    N O T E S
    Explosive limits are unknown in literature, although the substance is combustible and has a flash point <55C. An added stabilizer or inhibitor can influence the toxicological properties of this substance, consult an expert.
    Transport Emergency Card: TEC (R)-30G35
    ADDITIONAL INFORMATION


    ICSC: 0857 CYCLOPENTADIENE
    © IPCS, CEC, 1993
    IMPORTANT LEGAL NOTICE: Neither the CEC or the IPCS nor any person acting on behalf of the CEC or the IPCS is responsible for the use which might be made of this information. This card contains the collective views of the IPCS Peer Review Committee and may not reflect in all cases all the detailed requirements included in national legislation on the subject. The user should verify compliance of the cards with the relevant legislation in the country of use.