Butanedioic acid, 1,4-dimethyl ester, polymer with 4-hydroxy-2,2,6,6-tetramethyl-1-piperidineethanol

CAS 65447-77-0

U.S. production volumes are classified as confidential business information.

US productionCBI

Confidential Business Information. The EPA withholds this volume because publishing it could reveal the reporting company's trade secrets.

Import value, 2024$660M

Top sourceGermany 17%

At least one company claimed its 2023 production or import volume for this chemical as confidential, so EPA withholds it.

Why supply is unknown

Production is reported production, not a complete census of factories. US production volume is confidential. Production reporting year: 2023. Import value and source-country shares describe a shared customs category, not a separate chemical measurement.

Where It Comes From

Customs basis: HS 390799 · basket

EPA reports by year

2023: US production Confidential · Imports Confidential

These shares come from HS customs code 390799, which covers 18 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).

DE 17%GermanyTW 15%TaiwanCA 14%CanadaKR 12%South KoreaMX 7%Mexico

Portugal
Greece
Singapore
India
Turkey
Brazil
Poland
Sweden
Ireland
United Arab Emirates
Colombia
Vietnam
Norway
Czech Republic
Slovenia
Finland
Romania
Egypt
Costa Rica
Hungary
Lithuania
South Africa
El Salvador
Honduras
Denmark
Bulgaria
Pakistan
Georgia
Latvia
Australia

Domestic parents -- activity not disclosed (1)

EPA records name a US company for this chemical but do not disclose whether the company made it here or imported it.

Si Group

EPA-registered importers (1)

Companies that report making or importing this chemical to the EPA. Registration is US-centric and does not indicate import origin.

Univar Solutions

Why It Matters

Sectors

Plastics & Rubber

Downstream UsesNot recorded

FDA Shortage Status

Whether any manufacturer currently reports this drug as in shortage on the FDA Drug Shortages database. "Active Shortage" means at least one presentation has status "current."

No FDA shortage records

Industrial Uses

Used in 2 sectors as 1 functional role.

•Antioxidant in Synthetic Rubber Manufacturing (50%)Processing—incorporation into formulation, mixture, or reaction product
•Antioxidant in Plastics Material and Resin Manufacturing (50%)Processing—incorporation into formulation, mixture, or reaction product

Chemical Identity

CAS65447-77-0

PubChem CIDNot recorded

DTXSIDDTXSID8044254

FormulaNot recorded

Mol. WeightNot recorded

SMILESNot recorded

Data Sources

EPA TSCA InventoryRetrieved 2026-04-29
EPA Chemical Data ReportingReporting year: 2023 · Retrieved 2026-10-04
EPA Chemical Data ReportingReporting year: 2023 · Retrieved 2026-10-04
US Census international tradeReporting year: 2024 · Retrieved 2026-10-04

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Brief citations

Butanedioic acid, 1,4-dimethyl ester, polymer with 4-hydroxy-2,2,6,6-tetramethyl-1-piperidineethanol (CAS 65447-77-0) https://chemicalindependence.com/chemical/65447-77-0/ EPA TSCA Inventory: CAS 65447-77-0. Retrieved 2026-04-29. https://www.epa.gov/tsca-inventory EPA Chemical Data Reporting: 65447-77-0. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting EPA Chemical Data Reporting: CAS 65447-77-0. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting US Census international trade: HS 390799 for CAS 65447-77-0. Reporting year: 2024. https://usatrade.census.gov/