Butyric acid n-butyl ester

CAS 109-21-7

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$63M

Top sourceChina 22%

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 291560 · basket

EPA reports by year

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

These shares come from HS customs code 291560, which covers 183 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 22%ChinaDE 19%GermanySE 14%SwedenJP 13%JapanIN 9%India

Ireland
South Korea
United Arab Emirates
Russia
Ukraine
Israel
Brazil
Canada

Domestic parents -- activity not disclosed (1)

EPA records name a US company for this chemical but do not disclose whether the company made it here or imported it.

Eastman Chemical

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 ManufacturingProcessing as a reactant

Vendor Pricing

$0.04/gSigma-Aldrich (Rush Stock)

CountryGermany

Pack$356.60 / 9 kg

Purity98%

Vendors6 available

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

5 more vendors

Vendor	Country	$/g	Pack	Purity
Sigma-Aldrich	Germany	$0.04	9 kg	98%
Combi-Blocks, Inc.	United States	$0.25	1 kg	98%
A2B Chem LLC	United States	$0.27	1 kg	98%
AA BLOCKS	United States	$0.28	1 kg	98%
Labotest KG	Germany	$217.80	5000 mg	90%

Chemical Identity

CAS109-21-7

PubChem CID7983

DTXSIDDTXSID7041702

FormulaC8H16O2

Mol. Weight144.21 g/mol

SMILESCCCCOC(=O)CCC

Data Sources

EPA CompTox (DSSTox) · DTXSID7041702Retrieved 2026-04-06
PubChem · compound 7983Retrieved 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

Butyric acid n-butyl ester (CAS 109-21-7) https://chemicalindependence.com/chemical/109-21-7/ EPA CompTox (DSSTox): DTXSID7041702. Retrieved 2026-04-06. https://comptox.epa.gov/dashboard/chemical/details/DTXSID7041702 PubChem: 7983. Retrieved 2026-04-06. https://pubchem.ncbi.nlm.nih.gov/compound/7983 EPA Chemical Data Reporting: 109-21-7. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting EPA Chemical Data Reporting: CAS 109-21-7. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting US Census international trade: HS 291560 for CAS 109-21-7. Reporting year: 2024. https://usatrade.census.gov/