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Benzene, chloroethenyl-

CAS 1331-28-8

Molecular structure of 1331-28-8
US productionNot reported
Import value, 2024$108M
Top sourceChina 77%

This chemical is listed as active in US commerce, but no company reported it to EPA’s survey for 2019 or 2023. Sites may have made or imported less than the threshold amount, or none.

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 290399 · basket

These shares come from HS customs code 290399, which covers 178 tracked chemicals in total. They estimate the category's origin mix, not this chemical specifically.

Source Countries
CN 77%ChinaIN 7%IndiaDE 7%GermanyJP 5%JapanIT 2%Italy

Why It Matters

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

Chemical Identity

CAS1331-28-8
PubChem CIDNot recorded
DTXSIDDTXSID00859510
FormulaC8H7Cl
Mol. Weight138.59 g/mol
SMILESClC=CC1=CC=CC=C1

Data Sources

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Brief citations

Benzene, chloroethenyl- (CAS 1331-28-8) https://chemicalindependence.com/chemical/1331-28-8/ EPA TSCA Inventory: CAS 1331-28-8. Retrieved 2026-10-04. https://www.epa.gov/tsca-inventory US Census international trade: HS 290399 for CAS 1331-28-8. Reporting year: 2024. https://usatrade.census.gov/