2-Butanone peroxide

CAS 1338-23-4

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$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

Country of origin for US imports, from Census customs data (2024).

CN 47%ChinaDE 31%GermanyKR 11%South KoreaBE 8%BelgiumTR 1%Turkey

Malaysia
India
Mexico
Lithuania
Japan
Canada
Italy

EPA-registered manufacturers (3)

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

United Initiators Gmbh · DE Germany

Arkema

United Initiators

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 2 functional roles.

•CBI in CBICBI
•Polymerization promoter in Plastics Product Manufacturing (100%)Processing as a reactant

Chemical Identity

CAS1338-23-4

PubChem CID3672772

DTXSIDDTXSID1024671

FormulaC8H18O6

Mol. Weight210.22 g/mol

SMILESCCC(C)(OO)OOC(C)(CC)OO

Data Sources

EPA CompTox (DSSTox) · DTXSID1024671Retrieved 2026-04-06
PubChem · compound 3672772Retrieved 2026-04-06
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

2-Butanone peroxide (CAS 1338-23-4) https://chemicalindependence.com/chemical/1338-23-4/ EPA CompTox (DSSTox): DTXSID1024671. Retrieved 2026-04-06. https://comptox.epa.gov/dashboard/chemical/details/DTXSID1024671 PubChem: 3672772. Retrieved 2026-04-06. https://pubchem.ncbi.nlm.nih.gov/compound/3672772 EPA Chemical Data Reporting: 1338-23-4. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting EPA Chemical Data Reporting: CAS 1338-23-4. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting US Census international trade: HS 290960 for CAS 1338-23-4. Reporting year: 2024. https://usatrade.census.gov/