1H-Pyrrole-2,5-dione, 1,1'-(2,2,4-trimethyl-1,6-hexanediyl)bis-

CAS 39979-46-9

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$43M

Top sourceJapan 25%

At least one company claimed its 2019 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: 2019. Import value and source-country shares describe a shared customs category, not a separate chemical measurement.

Where It Comes From

Customs basis: HS 292519 · basket

EPA reports by year

2019: US production Confidential · Imports Confidential

These shares come from HS customs code 292519, which covers 43 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).

JP 25%JapanCN 21%ChinaGB 21%United KingdomAT 14%AustriaDE 7%Germany

Australia
Belgium
Israel
Switzerland
Hungary
Ukraine
Slovakia
Singapore

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.

Evonik

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

•Intermediate in Plastics Material and Resin Manufacturing (100%)Processing as a reactant

Chemical Identity

CAS39979-46-9

PubChem CID170261

DTXSIDDTXSID20885790

FormulaC17H22N2O4

Mol. Weight318.4 g/mol

SMILESCC(CCN1C(=O)C=CC1=O)CC(C)(C)CN2C(=O)C=CC2=O

Data Sources

EPA CompTox (DSSTox) · DTXSID20885790Retrieved 2026-04-06
PubChem · compound 170261Retrieved 2026-04-06
EPA Chemical Data ReportingReporting year: 2019 · Retrieved 2026-10-04
EPA Chemical Data ReportingReporting year: 2019 · Retrieved 2026-10-04
US Census international tradeReporting year: 2024 · Retrieved 2026-10-04

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Brief citations

1H-Pyrrole-2,5-dione, 1,1'-(2,2,4-trimethyl-1,6-hexanediyl)bis- (CAS 39979-46-9) https://chemicalindependence.com/chemical/39979-46-9/ EPA CompTox (DSSTox): DTXSID20885790. Retrieved 2026-04-06. https://comptox.epa.gov/dashboard/chemical/details/DTXSID20885790 PubChem: 170261. Retrieved 2026-04-06. https://pubchem.ncbi.nlm.nih.gov/compound/170261 EPA Chemical Data Reporting: 39979-46-9. Reporting year: 2019. https://www.epa.gov/chemical-data-reporting EPA Chemical Data Reporting: CAS 39979-46-9. Reporting year: 2019. https://www.epa.gov/chemical-data-reporting US Census international trade: HS 292519 for CAS 39979-46-9. Reporting year: 2024. https://usatrade.census.gov/