2-Pentanone oxime

CAS 623-40-5

2-Pentanone, oxime

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$191M

Top sourceSwitzerland 35%

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 292800 · basket

EPA reports by year

2023: US production Confidential · Imports Confidential

These shares come from HS customs code 292800, which covers 112 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).

CH 35%SwitzerlandIT 28%ItalyCN 12%ChinaIN 6%IndiaJP 6%Japan

Canada
Spain
Mexico
Netherlands
Poland
Malta
Norway
Ukraine
Belgium
Israel
Czech Republic
Austria
Indonesia
United Arab Emirates
Brazil
Lithuania

EPA-registered manufacturers (1)

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

Advansix

Why It Matters

Sectors

ConstructionPaints & Coatings

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 Adhesive Manufacturing (44%)Processing—incorporation into formulation, mixture, or reaction product
•Antioxidant in Paint and Coating Manufacturing (56%)Processing—incorporation into formulation, mixture, or reaction product

Chemical Identity

CAS623-40-5

PubChem CIDNot recorded

DTXSIDDTXSID901031548

FormulaC5H11NO

Mol. Weight101.149 g/mol

SMILESCCCC(C)=NO

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

2-Pentanone oxime (CAS 623-40-5) https://chemicalindependence.com/chemical/623-40-5/ EPA TSCA Inventory: CAS 623-40-5. Retrieved 2026-04-29. https://www.epa.gov/tsca-inventory EPA Chemical Data Reporting: 623-40-5. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting EPA Chemical Data Reporting: CAS 623-40-5. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting US Census international trade: HS 292800 for CAS 623-40-5. Reporting year: 2024. https://usatrade.census.gov/