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]

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."

Adverse Effects
Neurotoxin

Other CNS Neurotoxin

Hepatotoxin

Hepatotoxin, Secondary

Links to Other NLM Databases
Health Studies

Human Health Effects from Hazardous Substances Data Bank:

Toxicity Information

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Chemical Information

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Related Information in HazMap
Other Information

No other related information on this agent was found.