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2,5-Dimethyl-2,5-di-(tert-butylperoxy)hexane

CAS 78-63-7

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

Molecular structure of 78-63-7
US productionCBI
Import value, 2024$56M
Top sourceChina 47%

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 290960 · basket

EPA reports by year
2023
US production Confidential · Imports Confidential
2019
US production Confidential · Imports Confidential

These shares come from HS customs code 290960, which covers 29 tracked chemicals in total. They estimate the category's origin mix, not this chemical specifically.

Source Countries
CN 47%ChinaDE 31%GermanyKR 11%South KoreaBE 8%BelgiumTR 1%Turkey
EPA-registered manufacturers (2)
United Initiators Gmbh · DE Germany
United Initiators
Domestic parents -- activity not disclosed (2)
American River Brokerage
Koch Industries
EPA-registered importers (2)
Arkema
Pergan Marshall

Why It Matters

Sectors
Plastics & RubberCore Chemicals
Downstream UsesNot recorded
FDA Shortage Status
No FDA shortage records

Industrial Uses

Used in 6 sectors as 8 functional roles.

  • •Chemical reaction regulator in Plastics Material and Resin ManufacturingProcessing as a reactant
  • •Intermediate in All Other Basic Organic Chemical ManufacturingProcessing as a reactant
  • •Hardener in Plastics Product ManufacturingProcessing as a reactant
  • •CBI in CBICBI
  • •Flow promoter in All Other Basic Inorganic Chemical ManufacturingProcessing—incorporation into formulation, mixture, or reaction product
  • •Polymerization promoter in Rubber Product ManufacturingProcessing as a reactant
  • •Polymerization promoter in Plastics Material and Resin ManufacturingProcessing as a reactant
  • •Plasticizer in Plastics Product Manufacturing (100%)Processing as a reactant
  • •Viscosity modifiers in Plastics Material and Resin ManufacturingProcessing—incorporation into formulation, mixture, or reaction product

Chemical Identity

CAS78-63-7
PubChem CID6545
DTXSIDDTXSID9025110
FormulaC16H34O4
Mol. Weight290.44 g/mol
SMILESCC(C)(C)OOC(C)(C)CCC(C)(C)OOC(C)(C)C

Data Sources

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Brief citations

2,5-Dimethyl-2,5-di-(tert-butylperoxy)hexane (CAS 78-63-7) https://chemicalindependence.com/chemical/78-63-7/ EPA CompTox (DSSTox): DTXSID9025110. Retrieved 2026-04-06. https://comptox.epa.gov/dashboard/chemical/details/DTXSID9025110 PubChem: 6545. Retrieved 2026-04-06. https://pubchem.ncbi.nlm.nih.gov/compound/6545 EPA Chemical Data Reporting: 78-63-7. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting EPA Chemical Data Reporting: CAS 78-63-7. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting US Census international trade: HS 290960 for CAS 78-63-7. Reporting year: 2024. https://usatrade.census.gov/