Methylcyclopentadiene dimer

CAS 26472-00-4

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

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.

Newmarket

Why It Matters

No EPA sector or FDA product records name a use for this chemical.

Chemical Identity

CAS26472-00-4

PubChem CID3033878

DTXSIDDTXSID3027902

FormulaC12H16

Mol. Weight160.25 g/mol

SMILESCC1C2C3CC(C2C=C1C)C=C3

Data Sources

EPA CompTox (DSSTox) · DTXSID3027902Retrieved 2026-04-06
PubChem · compound 3033878Retrieved 2026-04-06
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

Methylcyclopentadiene dimer (CAS 26472-00-4) https://chemicalindependence.com/chemical/26472-00-4/ EPA CompTox (DSSTox): DTXSID3027902. Retrieved 2026-04-06. https://comptox.epa.gov/dashboard/chemical/details/DTXSID3027902 PubChem: 3033878. Retrieved 2026-04-06. https://pubchem.ncbi.nlm.nih.gov/compound/3033878 EPA Chemical Data Reporting: 26472-00-4. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting US Census international trade: HS 290219 for CAS 26472-00-4. Reporting year: 2024. https://usatrade.census.gov/