Dicyclopentadiene

CAS 77-73-6

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$90M

Top sourceJapan 21%

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 290219 · basket

EPA reports by year

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

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 (9)

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

Shell Plc · GB United Kingdom

Sojitz · JP Japan

Gulf Coast Growth Ventures

Lyondell Chemical

Nippon Chemical Texas

Show all 9

Shell Chemical Appalachia

Sojitz Corporation Of America

Texmark Chemicals

The Goodyear Tire & Rubber

Domestic parents -- activity not disclosed (6)

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

Aoc

Eastman Chemical

ExxonMobil

Ineos Enterprises Us Hold

Kh Chemicals Na

Show all 6

Nc Holdings Usa

EPA-registered importers (6)

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

Ineos · GB United Kingdom

Sojitz · JP Japan

Zeon Corporaton · JP Japan

Ergon Chemicals

The Chemical

Show all 6

Zeon Chemicals

Why It Matters

Sectors

EnergyTransportationPlastics & RubberPaints & CoatingsCore 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 7 sectors as 6 functional roles.

•Intermediate in Petrochemical Manufacturing (100%)Processing—incorporation into formulation, mixture, or reaction product
•Adhesion/cohesion promoter in Plastics Material and Resin Manufacturing (100%)Processing as a reactant
•Monomers in Plastics Material and Resin Manufacturing (100%)Processing—incorporation into formulation, mixture, or reaction product
•Intermediate in Plastics Material and Resin Manufacturing (100%)Processing as a reactant
•Intermediate in Paint and Coating ManufacturingProcessing—incorporation into formulation, mixture, or reaction product
•Intermediate in All Other Basic Organic Chemical ManufacturingProcessing as a reactant
•Laboratory chemicals in Plastics Material and Resin Manufacturing (100%)Processing—incorporation into formulation, mixture, or reaction product
•Hardener in Plastics Product Manufacturing (100%)Processing—incorporation into formulation, mixture, or reaction product
•Plasticizer in Plastics Material and Resin Manufacturing (100%)Processing—incorporation into formulation, mixture, or reaction product
•Monomers in Transportation Equipment Manufacturing (30%)Processing—repackaging
•Monomers in Plastics Product Manufacturing (90%)Processing—incorporation into article
•Monomers in Oil and Gas Drilling, Extraction, and Support activities (10%)Processing—incorporation into article

Vendor Pricing

$0.11/gSigma-Aldrich (Rush Stock)

CountryGermany

Pack$269.02 / 2.5 kg

PurityNot recorded

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	$0.11	2.5 kg	—
MedKoo Biosciences, Inc	United States	$14.00	25 g	98%
Labotest KG	Germany	$217.80	5000 mg	90%
Otava, Ltd.	Ukraine	$2280.00	50 mg	95%
Otava, Ltd. (2 weeks)	Ukraine	$2724.00	50 mg	95%

Chemical Identity

CAS77-73-6

PubChem CID6492

DTXSIDDTXSID5025023

FormulaC10H12

Mol. Weight132.2 g/mol

SMILESC1C=CC2C1C3CC2C=C3

Data Sources

EPA CompTox (DSSTox) · DTXSID5025023Retrieved 2026-04-06
PubChem · compound 6492Retrieved 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

Dicyclopentadiene (CAS 77-73-6) https://chemicalindependence.com/chemical/77-73-6/ EPA CompTox (DSSTox): DTXSID5025023. Retrieved 2026-04-06. https://comptox.epa.gov/dashboard/chemical/details/DTXSID5025023 PubChem: 6492. Retrieved 2026-04-06. https://pubchem.ncbi.nlm.nih.gov/compound/6492 EPA Chemical Data Reporting: 77-73-6. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting EPA Chemical Data Reporting: CAS 77-73-6. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting US Census international trade: HS 290219 for CAS 77-73-6. Reporting year: 2024. https://usatrade.census.gov/