tert-Butylstyrene
CAS 25338-51-6
Benzene, (1,1-dimethylethyl)ethenyl-
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 unknownProduction 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 290290 · basket
These shares come from HS customs code 290290, which covers 171 tracked chemicals in total. They estimate the category's origin mix, not this chemical specifically.
- Czech Republic
- Netherlands
- Switzerland
- Pakistan
- United Kingdom
- Austria
- Denmark
- Indonesia
- Lithuania
- Hong Kong
- Finland
Why It Matters
No EPA sector or FDA product records name a use for this chemical.
Chemical Identity
Data Sources
- EPA TSCA InventoryRetrieved 2026-10-04
- US Census international tradeReporting year: 2024 · Retrieved 2026-10-04
Brief citations
tert-Butylstyrene (CAS 25338-51-6) https://chemicalindependence.com/chemical/25338-51-6/ EPA TSCA Inventory: CAS 25338-51-6. Retrieved 2026-10-04. https://www.epa.gov/tsca-inventory US Census international trade: HS 290290 for CAS 25338-51-6. Reporting year: 2024. https://usatrade.census.gov/