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Chemical Sampling Information (CSI)
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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):

  • sampling media: 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
    analytical 1: Gas Chromatography; GC/FID
    method reference: 1 (NIOSH 2523 [25 KB PDF, 4 pages])
    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.

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