3,4-Dihydro-2H-pyrrole

CAS 5724-81-2

Molecular structure of 5724-81-2
US productionNot reported
Import value, 2024$1.4B
Top sourceIreland 33%

This chemical is not on EPA’s Toxic Substances Control Act inventory, the list behind EPA’s production survey.

Why supply is unknown

Production is reported production, not a complete census of factories. Import value and source-country shares describe a shared customs category, not a separate chemical measurement.

Where It Comes From

Customs basis: HS 293399 · basket

These shares come from HS customs code 293399, which covers 518 tracked chemicals in total. They estimate the category's origin mix, not this chemical specifically.

Source Countries
IE 33%IrelandCN 26%ChinaIN 11%IndiaDE 9%GermanyIT 4%Italy

Why It Matters

No EPA sector or FDA product records name a use for this chemical.

Chemical Identity

CAS5724-81-2
PubChem CIDNot recorded
DTXSIDDTXSID10863608
FormulaC4H7N
Mol. Weight69.107 g/mol
SMILESC1CC=NC1

Data Sources

Brief citations

3,4-Dihydro-2H-pyrrole (CAS 5724-81-2) https://chemicalindependence.com/chemical/5724-81-2/ EPA CompTox (DSSTox): 5724-81-2. Retrieved 2026-04-29. https://comptox.epa.gov/dashboard/chemical/details/DTXSID10863608 US Census international trade: HS 293399 for CAS 5724-81-2. Reporting year: 2024. https://usatrade.census.gov/