Agent Name

Cyclopentadiene

CAS Number

542-92-7

Formula

C5-H6

Major Category

Other Classes

Synonyms

1,3-Cyclopentadiene; Cyclopentadiene; Pentole; Pyropentylene; R-Pentine; [ChemIDplus]

Category

Aliphatics, Unsaturated

Description

Colorless liquid with an irritating, terpene-like odor; [NIOSH]

Sources/Uses

Used in resin manufacturing and other organic syntheses; [ACGIH]

Comments

Cyclopentadiene causes narcosis and liver injury in animal experiments. It has an irritating odor that is objectionable to workers. [ACGIH] A skin, eye, and respiratory tract irritant; [ICSC]

Exposure Assessment
Skin Designation (ACGIH)

Insufficient data

TLV (ACGIH)

75 ppm

PEL (OSHA)

75 ppm

IDLH (NIOSH)

750 ppm

Excerpts from Documentation for IDLHs

Basis for original (SCP) IDLH: The chosen IDLH is based on the statement by Deichmann and Gerarde [1969] that 4 of 6 rats died from a 4hour exposure to 2,000 ppm [Smyth et al. 1954]. . . . Human data: None relevant for use in determining the revised IDLH.

Vapor Pressure

435 mm Hg

Odor Threshold Low

1.8 ppm

Lethal Concentration

LC67 (rat) = 2,000 ppm/4H

Explanatory Notes

Odor threshold from AIHA; Flash point = 77 deg F;

Adverse Effects
Neurotoxin

CNS Solvent Syndrome

Hepatotoxin

Hepatotoxin, Secondary

Links to Other NLM Databases
Health Studies

Human Health Effects from Hazardous Substances Data Bank:

Toxicity Information

Search TOXNET

Chemical Information

Search ChemIDplus

Related Information in HazMap
Diseases

Occupational diseases associated with exposure to this agent: