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."

Flammability (NFPA)

2: High ambient temperature required

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.