1-Ethenylpyrrolidin-2-one--icos-1-ene (1/1)

CAS 28211-18-9

2-Pyrrolidinone, 1-ethenyl-, polymer with 1-eicosene

US productionNot reported

Import value, 2024$907M

Top sourceIreland 47%

EPA exempts this chemical from its production survey.

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 293379 · basket

These shares come from HS customs code 293379, which covers 105 tracked chemicals in total. They estimate the category's origin mix, not this chemical specifically.

Source Countries

Country of origin for US imports, from Census customs data (2024).

IE 47%IrelandBE 19%BelgiumSG 11%SingaporeIT 4%ItalyCH 4%Switzerland

Brazil
Canada
Taiwan
Ukraine
Portugal
Netherlands
South Korea
Israel
Czech Republic
Spain
Finland
Hungary
Malaysia
Australia
Austria
Slovenia

Why It Matters

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

Chemical Identity

CAS28211-18-9

PubChem CIDNot recorded

DTXSIDDTXSID30950943

FormulaC26H49NO

Mol. Weight391.684 g/mol

SMILESC=CN1CCCC1=O.CCCCCCCCCCCCCCCCCCC=C

Data Sources

EPA TSCA InventoryRetrieved 2026-10-04
US Census international tradeReporting year: 2024 · Retrieved 2026-10-04

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Brief citations

1-Ethenylpyrrolidin-2-one--icos-1-ene (1/1) (CAS 28211-18-9) https://chemicalindependence.com/chemical/28211-18-9/ EPA TSCA Inventory: CAS 28211-18-9. Retrieved 2026-10-04. https://www.epa.gov/tsca-inventory US Census international trade: HS 293379 for CAS 28211-18-9. Reporting year: 2024. https://usatrade.census.gov/