Pyrrole
Agent Name
Pyrrole
CAS Number
109-97-7
Formula
C4-H5-N
Major Category
Nitrogen Compounds
Synonyms
1-Aza-2,4-cyclopentadiene; 1H-Pyrrole; Azole; Divinyleneimine; Divinylenimine; Imidole; Monopyrrole; Pyrrol; [ChemIDplus] UN1992
Category
Pyrroles
Description
Colorless liquid with an agreeable odor like chloroform; Darkens on standing if oxygen not completely removed; [Merck Index] Yellowish or brown liquid; Turns brown when polymerized by light; [Hawley] Hygroscopic; [HSDB] Colorless liquid; [MSDSonline]
Sources/Uses
Found in coal tar and bone oil; [Merck Index] Used as an intermediate (pharmaceuticals, dyes, herbicides, and perfumes) and curing agent for resins; [HSDB]
Comments
A CNS depressant; May cause liver injury; Effects of high doses administered by IP injection in dogs include convulsions and liver injury; [HSDB] Safe when used as a flavoring agent in food; [JECFA] Causes convulsions and muscle contractions in oral lethal-dose studies of rabbits; [RTECS]
Biomedical References
Exposure Assessment
Vapor Pressure
8.36 mm Hg
Lethal Concentration
LC50 (rat) = 2,270 mg/m3/4h
Explanatory Notes
The Guide in the Emergency Response Guidebook is for "Flammable liquid, toxic, n.o.s." VP from ChemIDplus;
NFPA
high ambient temp required
Adverse Effects
Neurotoxin
Other CNS neurotoxin
Hepatotoxin
Hepatoxic (a) from occupational exposure (secondary effect) or (b) in animal studies or in humans after ingestion
Diseases, Processes, and Activities Linked to This Agent
Other Information
No other related information on this agent was found.