1-Bromobutane

CAS 109-65-9

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$18M

Top sourceChina 42%

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 290369 · basket

EPA reports by year

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

These shares come from HS customs code 290369, which covers 96 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 42%ChinaIN 19%IndiaIT 14%ItalyIL 13%IsraelNL 9%Netherlands

Singapore
Germany
Hungary
Ukraine
Switzerland
Mexico
Hong Kong

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.

Lanxess

Domestic parents -- activity not disclosed (2)

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

Icl Specialty Products North America

Wego Chemical Group

EPA-registered importers (1)

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

Dow Chemical

Why It Matters

Sectors

AgricultureCore 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

Used in 2 sectors as 1 functional role.

•Intermediate in All Other Basic Organic Chemical Manufacturing (100%)Processing as a reactant
•Intermediate in Petrochemical Manufacturing (100%)Processing as a reactant

Vendor Pricing

$0.05/gA2B Chem LLC

CountryUnited States

Pack$24.00 / 500 g

Purity95%

Vendors10 available

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

9 more vendors

Vendor	Country	$/g	Pack	Purity
ALFA AESAR	Germany	$0.05	2.5 kg	98%
AA BLOCKS	United States	$0.06	500 g	98%
Sigma-Aldrich (Rush Stock)	Germany	$0.07	2.5 kg	99%
Sigma-Aldrich	Germany	$0.07	2.5 kg	99%
Combi-Blocks, Inc.	United States	$0.25	1 kg	97%
AK Scientific Specialized	United States	$0.60	100 g	98%
AK Scientific, Inc.	United States	$0.84	100 g	99%
Labotest KG	Germany	$217.80	5000 mg	90%
Otava, Ltd.	Ukraine	$460.00	250 mg	95%

Chemical Identity

CAS109-65-9

PubChem CID8002

DTXSIDDTXSID6021903

FormulaC4H9Br

Mol. Weight137.02 g/mol

SMILESCCCCBr

Data Sources

EPA CompTox (DSSTox) · DTXSID6021903Retrieved 2026-04-06
PubChem · compound 8002Retrieved 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

1-Bromobutane (CAS 109-65-9) https://chemicalindependence.com/chemical/109-65-9/ EPA CompTox (DSSTox): DTXSID6021903. Retrieved 2026-04-06. https://comptox.epa.gov/dashboard/chemical/details/DTXSID6021903 PubChem: 8002. Retrieved 2026-04-06. https://pubchem.ncbi.nlm.nih.gov/compound/8002 EPA Chemical Data Reporting: 109-65-9. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting EPA Chemical Data Reporting: CAS 109-65-9. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting US Census international trade: HS 290369 for CAS 109-65-9. Reporting year: 2024. https://usatrade.census.gov/