1,5-Cyclooctadiene

CAS 111-78-4

Used in 1 industrial sector tracked by the EPA.

US production58.9K lb

Import value, 2024$90M

Import volume169.9K lb

Import dependency74%

Top sourceJapan 21%

Production is reported production, not a complete census of factories. Production reporting year: 2019. Import value and source-country shares describe a shared customs category, not a separate chemical measurement.

Where It Comes From

Customs basis: HS 290219 · basket

EPA reports by year

2019: US production 58.9K lb · Imports 169.9K lb

These shares come from HS customs code 290219, which covers 108 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).

JP 21%JapanBR 12%BrazilTW 12%TaiwanKR 11%South KoreaDE 9%Germany

Russia
United Kingdom
Indonesia
South Africa
Ukraine
Madagascar
Hungary
Hong Kong
Czech Republic
Israel

EPA-registered manufacturers (2)

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

Arlanxeo Holding Bv · NL Netherlands

Arlanxeo Usa

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.

Koch Industries

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.

Arlanxeo

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

•Catalyst in Synthetic Rubber Manufacturing (100%)Processing as a reactant

Vendor Pricing

$0.29/gAA BLOCKS (1 week)

CountryUnited States

Pack$147.00 / 500 g

PurityNot recorded

Vendors1 available

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

Chemical Identity

CAS111-78-4

PubChem CID82916

DTXSIDDTXSID0026888

FormulaC8H12

Mol. Weight108.18 g/mol

SMILESC1CC=CCCC=C1

Data Sources

EPA CompTox (DSSTox) · DTXSID0026888Retrieved 2026-04-06
PubChem · compound 82916Retrieved 2026-04-06
EPA Chemical Data ReportingReporting year: 2019 · 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

1,5-Cyclooctadiene (CAS 111-78-4) https://chemicalindependence.com/chemical/111-78-4/ EPA CompTox (DSSTox): DTXSID0026888. Retrieved 2026-04-06. https://comptox.epa.gov/dashboard/chemical/details/DTXSID0026888 PubChem: 82916. Retrieved 2026-04-06. https://pubchem.ncbi.nlm.nih.gov/compound/82916 EPA Chemical Data Reporting: 111-78-4. Reporting year: 2019. https://www.epa.gov/chemical-data-reporting EPA Chemical Data Reporting: CAS 111-78-4. Reporting year: 2019. https://www.epa.gov/chemical-data-reporting US Census international trade: HS 290219 for CAS 111-78-4. Reporting year: 2024. https://usatrade.census.gov/