CYCLOPENTADIENE

1,3-CYCLOPENTADIENE

PENTOLE

PYROPENTYLENE

p-PENTINE

R-PENTINE

542-92-7

GY 1000000

Editor's Note: This material is not listed in the Emergency Response Guidebook. Based on the material's physical and chemical properties, toxicity, or chemical group, a guide has been assigned. For additional technical information, contact one of the emergency response telephone numbers listed under Public Safety Measures.

C5H6 CH:CHCH2CH:CH

152-SUBSTANCES - TOXIC (COMBUSTIBLE)

Cyclopentadiene is used as a chemical intermediate in the manufacture of resins and a starting material for synthetic prostaglandin. It is used in chlorinated insecticides, organic synthesis, and in the formation of sandwich compounds by chelation (Budavari, 1996; Hathaway et al, 1996; Lewis, 1997).

It is obtained from coal tar and cracked petroleum hydrocarbons (Budavari, 1996; Lewis, 1997).

Highly toxic, may be fatal if inhaled, swallowed or absorbed through skin.

Contact with molten substance may cause severe burns to skin and eyes.

Avoid any skin contact.

Effects of contact or inhalation may be delayed.

Fire may produce irritating, corrosive and/or toxic gases.

Runoff from fire control or dilution water may be corrosive and/or toxic and cause pollution.

Move victim to fresh air.

Call 911 or emergency medical service.

Give artificial respiration if victim is not breathing.

Do not use mouth-to-mouth method if victim ingested or inhaled the substance; give artificial respiration with the aid of a pocket mask equipped with a one-way valve or other proper respiratory medical device.

Administer oxygen if breathing is difficult.

Remove and isolate contaminated clothing and shoes.

In case of contact with substance, immediately flush skin or eyes with running water for at least 20 minutes.

For minor skin contact, avoid spreading material on unaffected skin.

Keep victim warm and quiet.

Effects of exposure (inhalation, ingestion or skin contact) to substance may be delayed.

Ensure that medical personnel are aware of the material(s) involved and take precautions to protect themselves.

FIRST AID

GENERAL

INHALATION EXPOSURE

DERMAL EXPOSURE

EYE EXPOSURE

ORAL EXPOSURE

The minimum lethal human dose to this agent has not been delineated.

Fatality occurred in rabbits following subcutaneous injection of 3.0 mL (Clayton & Clayton, 1994).

The maximum tolerated human exposure to this agent has not been delineated.

Dogs experienced no negative symptoms from 39 6-hour exposures to an airborne concentration of 400 ppm, followed by 16 6-hour exposures to 800 ppm (ACGIH, 1991; Hathaway et al, 1996).

Daily exposure to an airborne concentration of 250 ppm for 6 months also resulted in no negative effects in dogs, guinea pigs, rabbits, and rats (ACGIH, 1991; Hathaway et al, 1996).

No effects were noted in rabbits following subcutaneous injection of 0.5 to 1.0 mL (Clayton & Clayton, 1994).

ACGIH (American Conference of Governmental Industrial Hygienists, 2010): Not Listed ; Listed as: Cyclopentadiene

EPA (U.S. Environmental Protection Agency, 2011): Not Listed

IARC (International Agency for Research on Cancer (IARC), 2016; International Agency for Research on Cancer, 2015; IARC Working Group on the Evaluation of Carcinogenic Risks to Humans, 2010; IARC Working Group on the Evaluation of Carcinogenic Risks to Humans, 2010a; IARC Working Group on the Evaluation of Carcinogenic Risks to Humans, 2008; IARC Working Group on the Evaluation of Carcinogenic Risks to Humans, 2007; IARC Working Group on the Evaluation of Carcinogenic Risks to Humans, 2006; IARC, 2004): Not Listed

NIOSH (National Institute for Occupational Safety and Health, 2007): Not Listed ; Listed as: Cyclopentadiene

MAK (DFG, 2002): Not Listed

NTP (U.S. Department of Health and Human Services, Public Health Service, National Toxicology Project ): Not Listed

Not Listed

References: Clayton & Clayton, 1994 Hathaway et al, 1996 Lewis, 1996 RTECS, 1998

1 ppm = 2.70 mg/m(3) (at 68 degrees F and 760 mmHg) (NIOSH , 1998)

Editor's Note: The listed values are recommendations or guidelines developed by ACGIH(R) to assist in the control of health hazards. They should only be used, interpreted and applied by individuals trained in industrial hygiene. Before applying these values, it is imperative to read the introduction to each section in the current TLVs(R) and BEI(R) Book and become familiar with the constraints and limitations to their use. Always consult the Documentation of the TLVs(R) and BEIs(R) before applying these recommendations and guidelines.

Not Listed

Listed as: Cyclopentadiene

REL:

IDLH:

Listed as: Cyclopentadiene

Table Z-1 for Cyclopentadiene:

Not Listed

Not Listed

Not Listed

Not Listed

Editor's Note: The D, F, and K series waste numbers and Appendix VIII to Part 261 -- Hazardous Constituents were not included. Please refer to 40 CFR Part 261.

Not Listed

Not Listed

Not Listed

Listed as: 1,3-Cyclopentadiene

Not Listed

Not Listed

Not Listed

Cyclopentadiene should be stored in tightly closed containers in a cool, well-ventilated area. Keep out of confined spaces and away from sources of ignition and strong oxidizing agents. Metal containers used for transfer of this compound should be grounded and bonded. Drums should be equipped with pressure vacuum bungs, self-closing valves, and flame arresters (HSDB , 1998; Lewis, 1996; Sittig, 1991).

When using metal containers to transfer 5 gallons or more of this compound, the containers should be grounded and bonded. Equip drums with pressure vacuum bungs, self-closing valves, and flame arresters (Sittig, 1991).

Store this compound at temperatures below 32 degrees F to avoid explosive reactions. Keep it away from sources of ignition and strong oxidizing agents (Sittig, 1991).

To prevent dimerization, store cyclopentadiene at temperatures below -80 degrees C. Closed containers which are not cooled may rupture if dimerization occurs as it is a highly exothermic process (Lewis, 1996; Urben, 1995).

Areas where cyclopentadiene is used must be properly ventilated. Ventilation should be placed as close to the point of generation as possible (HSDB , 1998).

Because of its explosive properties, keep cyclopentadiene out of confined spaces, such as sewers. Storage in a confined space may be permitted if it is designed to prevent the build-up of explosive concentrations (HSDB , 1998; Sittig, 1991).

Keep cyclopentadiene separate from fuming nitric acid, oxides of nitrogen, sulfuric acid, potassium hydroxide, dinitrogen tetroxide, and strong oxidizing agents (Lewis, 1996; NIOSH , 1998; Sittig, 1991).

Wear positive pressure self-contained breathing apparatus (SCBA).

Wear chemical protective clothing that is specifically recommended by the manufacturer. It may provide little or no thermal protection.

Structural firefighters' protective clothing provides limited protection in fire situations ONLY; it is not effective in spill situations where direct contact with the substance is possible.

Specific recommendations and test data for this chemical were not found in the available manufacturers' product literature. A complete list of consulted manufacturers and references is presented below.

Editor's Note: This material is not listed in the Emergency Response Guidebook. Based on the material's physical and chemical properties, toxicity, or chemical group, a guide has been assigned. For additional technical information, contact one of the emergency response telephone numbers listed under Public Safety Measures.

POTENTIAL FIRE OR EXPLOSION HAZARDS - EMERGENCY RESPONSE GUIDEBOOK, GUIDE 152 (ERG, 2004)

Cyclopentadiene is a flammable liquid that may explode or ignite when heated or compressed and can react with oxidizing materials. Fires should be extinguished from a distance using carbon dioxide, dry chemical, or foam extinguishers (Lewis, 1996; NIOSH , 1998; Sittig, 1991; Urben, 1995).

Not Listed

Dry chemical, CO2 or water spray.

Water spray, fog or regular foam.

Move containers from fire area if you can do it without risk.

Dike fire control water for later disposal; do not scatter the material.

Use water spray or fog; do not use straight streams.

Fight fire from maximum distance or use unmanned hose holders or monitor nozzles.

Do not get water inside containers.

Cool containers with flooding quantities of water until well after fire is out.

Withdraw immediately in case of rising sound from venting safety devices or discoloration of tank.

ALWAYS stay away from tanks engulfed in fire.

For massive fire, use unmanned hose holders or monitor nozzles; if this is impossible, withdraw from area and let fire burn.

Not Listed

Increase, in the downwind direction, as necessary, the isolation distance of at least 50 meters (150 feet) for liquids and at least 25 meters (75 feet) for solids in all directions.

If tank, rail car or tank truck is involved in a fire, ISOLATE for 800 meters (1/2 mile) in all directions; also, consider initial evacuation for 800 meters (1/2 mile) in all directions.

CALL Emergency Response Telephone Number on Shipping Paper first. If Shipping Paper not available or no answer, refer to appropriate telephone number:

For additional details see the section entitled "WHO TO CALL FOR ASSISTANCE" under the ERG Instructions.

As an immediate precautionary measure, isolate spill or leak area in all directions for at least 50 meters (150 feet) for liquids and at least 25 meters (75 feet) for solids.

Keep unauthorized personnel away.

Stay upwind.

Keep out of low areas.

Not Listed

Not Listed

Not Listed

IDLH: 750 ppm

Note(s): Not Listed

SPILL OR LEAK PRECAUTIONS - EMERGENCY RESPONSE GUIDEBOOK, GUIDE 152 (ERG, 2004)

RECOMMENDED PROTECTIVE CLOTHING - EMERGENCY RESPONSE GUIDEBOOK, GUIDE 152 (ERG, 2004)

Only persons wearing protective equipment should be allowed in the contaminated area (Sittig, 1991).

The contaminated area should be ventilated after all ignition sources have been removed (Sittig, 1991).

Sittig (1991) reports that liquids should be absorbed in materials such as dry sand, earth, or vermiculite and deposited in sealed containers.

ITI (1995) reports that spills should be absorbed on paper and then evaporated on glass or an iron dish in a hood. The paper should then be burned.

Allow small quantities to dimerize and then collect on paper or a similar material. Evaporate the paper in a fume hood, allowing sufficient time for evaporating vapors to completely clear the hood ductwork. The paper can then be burned in a suitable location (HSDB , 1998).

If large quantities will not be reclaimed, they should be dissolved in a flammable solvent and placed in an appropriate combustion chamber for atomization (HSDB , 1998).

Reclamation may be appropriate for large quantities of cyclopentadiene (HSDB , 1998).

Waste management activities associated with material disposition are unique to individual situations. Proper waste characterization and decisions regarding waste management should be coordinated with the appropriate local, state, or federal authorities to ensure compliance with all applicable rules and regulations.

A flammable solvent may be added to facilitate incineration for disposal of this compound (ITI, 1995; Sittig, 1991).

Cyclopentadiene should exist in air mostly as a vapor based on a vapor pressure of 439 mmHg at 25 degrees C. It may rapidly react with photochemically produced hydroxyl radicals, ozone molecules, and possibly nitrate radicals if it enters the atmosphere. The estimated atmospheric half-life is approximately 40 minutes (HSDB , 1998).

SURFACE WATER

TERRESTRIAL

Bioaccumulation is not expected to be significant in aquatic organisms (HSDB , 1998).

9 (estimated) (HSDB , 1998)

16 (estimated) (HSDB , 1998)

Bioconcentration in aquatic organisms should not be significant (HSDB , 1998).

(25 degrees C; 77 degrees F and 760 mmHg)

0.7966 (at 25/4 degrees C) (Budavari, 1996)

(0 degrees C; 32 degrees F and 760 mmHg)

0.8235 (at 0/4 degrees C) (Budavari, 1996)

0.80 (at 68/39.2 degrees F) (NIOSH , 1998)

0.80 (at 20/4 degrees C) (ITI, 1995)

0.80475 (at 19/4 degrees C) (Lewis, 1996)

0.8131 (at 10/4 degrees C) (Budavari, 1996)

0.80 (Clayton & Clayton, 1994)

0.8021 g/mL (at 20 degrees C) (ACGIH, 1991; Clayton & Clayton, 1994)

0.805 g/mL (Lewis, 1997)

-121 degrees F (NIOSH , 1998)

-85 degrees C (Budavari, 1996; Lewis, 1996)

-97.2 degrees C (Clayton & Clayton, 1994; HSDB , 1998)

Unknown (NIOSH , 1998)

Unknown (NIOSH , 1998)

This compound is insoluble in water (Budavari, 1996; Clayton & Clayton, 1994; NIOSH , 1998).

1800 mg/L (at 25 degrees C) (HSDB , 1998)

Cyclopentadiene is miscible with alcohol, benzene, carbon tetrachloride, and ether (Budavari, 1996; Clayton & Clayton, 1994; Lewis, 1997; Lewis, 1996).

It is soluble in acetone (HSDB , 1998).

Cyclopentadiene is soluble in acetic acid, aniline, carbon disulfide, and liquid petrolatum (ACGIH, 1991; Budavari, 1996).

2691 (Coblentz Society Spectral Collection) (HSDB , 1998)

6-42 (Organic Electronic Spectral Data, Phillips et al, John Wiley & Sons, New York) (HSDB , 1998)

49 (Atlas of Mass Spectral Data, John Wiley & Sons, New York) (HSDB , 1998)

1.9 ppm (ACGIH, 1991)

5.0 mg/m(3) (high and low threshold) (HSDB , 1998)

1.440 (at 20 degrees C/D) (Clayton & Clayton, 1994)

1.4440 (at 20 degrees C/D) (HSDB , 1998)

1.44632 (at 16 degrees C/D) (Budavari, 1996)