Butyl 4-oxopentanoate

CAS 2052-15-5

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$65M

Top sourceChina 20%

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 291830 · basket

EPA reports by year

2023: US production Confidential · Imports Confidential
2019: US production Confidential · Imports Confidential

These shares come from HS customs code 291830, which covers 98 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 20%ChinaIN 19%IndiaIT 19%ItalyCH 15%SwitzerlandJP 15%Japan

Netherlands
Ukraine
United Kingdom
New Zealand
Taiwan
Malaysia
Belgium
Madagascar
South Korea
Israel

Why It Matters

Sectors

Core Chemicals

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 All Other Basic Organic Chemical Manufacturing (100%)Processing as a reactant

Vendor Pricing

$0.08/gAaron Chemicals LLC

CountryHong Kong

Pack$41.00 / 500 g

Purity98%

Vendors8 available

Prices reflect listed pack sizes. Small research packs run far above bulk rates.

7 more vendors

Vendor	Country	$/g	Pack	Purity
BLD Pharmatech Ltd.	China	$0.09	1 kg	98%
Angene Chemical	China → Hong Kong	$0.09	500 g	98%
Combi-Blocks, Inc.	United States	$0.25	1 kg	98%
A2B Chem LLC	United States	$0.34	1 kg	98%
AA BLOCKS	United States	$0.36	1 kg	98%
AstaTech (2 weeks)	United States	$1.40	100 g	95%
Angene	China → Hong Kong	$4266.67	30 mg	98%

Chemical Identity

CAS2052-15-5

PubChem CID16331

DTXSIDDTXSID3038800

FormulaC9H16O3

Mol. Weight172.22 g/mol

SMILESCCCCOC(=O)CCC(=O)C

Data Sources

EPA CompTox (DSSTox) · DTXSID3038800Retrieved 2026-04-06
PubChem · compound 16331Retrieved 2026-04-06
EPA Chemical Data ReportingReporting year: 2023 · 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

Butyl 4-oxopentanoate (CAS 2052-15-5) https://chemicalindependence.com/chemical/2052-15-5/ EPA CompTox (DSSTox): DTXSID3038800. Retrieved 2026-04-06. https://comptox.epa.gov/dashboard/chemical/details/DTXSID3038800 PubChem: 16331. Retrieved 2026-04-06. https://pubchem.ncbi.nlm.nih.gov/compound/16331 EPA Chemical Data Reporting: 2052-15-5. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting EPA Chemical Data Reporting: CAS 2052-15-5. Reporting year: 2019. https://www.epa.gov/chemical-data-reporting US Census international trade: HS 291830 for CAS 2052-15-5. Reporting year: 2024. https://usatrade.census.gov/