[1,1'-Biphenyl]-4,4'-diol, polymer with 1,1'-sulfonylbis[4-chlorobenzene]
CAS 25608-64-4
EPA exempts this chemical from its production survey.
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 391190 · basket
These shares come from HS customs code 391190, which covers 36 tracked chemicals in total. They estimate the category's origin mix, not this chemical specifically.
- Malaysia
- Sweden
- Poland
- Netherlands
- Hungary
- Denmark
- Saudi Arabia
- Brazil
- Hong Kong
- Trinidad and Tobago
- Ireland
- Australia
- Lithuania
- Israel
- Slovenia
- Turkey
- Ecuador
- Honduras
- Peru
- Philippines
- Chile
- Luxembourg
- Dominican Republic
- Vietnam
- Czech Republic
- Finland
- Greece
- United Arab Emirates
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
[1,1'-Biphenyl]-4,4'-diol, polymer with 1,1'-sulfonylbis[4-chlorobenzene] (CAS 25608-64-4) https://chemicalindependence.com/chemical/25608-64-4/ EPA TSCA Inventory: CAS 25608-64-4. Retrieved 2026-10-04. https://www.epa.gov/tsca-inventory US Census international trade: HS 391190 for CAS 25608-64-4. Reporting year: 2024. https://usatrade.census.gov/