Powered by GoogleTranslate


General Description

  • Synonyms: 1,3-Cyclopentadiene
  • OSHA IMIS Code Number: 0845
  • Chemical Abstracts Service (CAS) Registry Number: 542-92-7
  • NIOSH Registry of Toxic Effects of Chemical Substances (RTECS) Identification Number: GY1000000; 28894
  • NIOSH Pocket Guide to Chemical Hazards, Cyclopentadiene: chemical description, physical properties, potentially hazardous incompatibilities, and more
  • Chemical Description and Physical Properties:
    • colorless liquid with a sweet odor like turpentine; dimer crystalline, camphor-like odor
    • molecular weight: 66
    • boiling point: 107°F
    • melting point: -121°F

Incompatibilities: Strong oxidizers

Exposure Limits

  • OSHA Permissible Exposure Limit (PEL):
    • General Industry: 75 ppm, 200 mg/m3
    • Construction Industry: 75 ppm, 200 mg/m3 TWA

American Conference of Governmental Industrial Hygienists (ACGIH) Threshold Limit Value (TLV): 75 ppm, 203 mg/m3 TWA

National Institute for Occupational Safety and Health (NIOSH) Recommended Exposure Limit (REL): 75 ppm TWA

Health Factors

Potential Symptoms: Eye, nose irritation

Health Effects: Irritation-Eye, Nose, Throat, Skin---Moderate (HE15)

Affected Organs: Eyes, respiratory system

Monitoring Methods used by OSHA

Primary Laboratory Sampling/Analytical Method (SLC1):
  • Coated Chromosorb 104 Tube (100/50 mg sections, 60/80 mesh); Coating is 20% (w/w) Maleic Anhydride
  • analytical solvent: Ethyl Acetate
  • maximum volume: 5 Liters
  • maximum flow rate: 0.05 L/min
  • current analytical method: Gas Chromatography; GC/FID
  • method reference: 1 (NIOSH 2523 (PDF))
  • sampling and analytical error: 0.09
  • method classification: Partially Validated
  • note: Keep tubes refrigerated and use within 20 days after preparation. OSHA personnel may obtain sampling tubes from SLTC.

** All Trademarks are the property of their respective owners.

*Accessibility Assistance: Contact OSHA's Directorate of Technical Support and Emergency Management at (202) 693-2300 for assistance accessing PDF materials.

All other documents, that are not PDF materials or formatted for the web, are available as Microsoft Office® formats and videos and are noted accordingly. If additional assistance is needed with reading, reviewing or accessing these documents or any figures and illustrations, please also contact OSHA's Directorate of Technical Support and Emergency Management at (202) 693-2300.

**eBooks - EPUB is the most common format for e-Books. If you use a Sony Reader, a Nook, or an iPad you can download the EPUB file format. If you use a Kindle, you can download the MOBI file format.

Back to Top

Thank You for Visiting Our Website

You are exiting the Department of Labor's Web server.

The Department of Labor does not endorse, takes no responsibility for, and exercises no control over the linked organization or its views, or contents, nor does it vouch for the accuracy or accessibility of the information contained on the destination server. The Department of Labor also cannot authorize the use of copyrighted materials contained in linked Web sites. Users must request such authorization from the sponsor of the linked Web site. Thank you for visiting our site. Please click the button below to continue.