2,5-Norbornadiene

CAS 121-46-0

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.

Milliken &

Why It Matters

Sectors

Health

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 Pharmaceutical and Medicine Manufacturing (100%)Processing as a reactant

Vendor Pricing

$3.12/gAstaTech, Inc

CountryUnited States

Pack$78.00 / 25 g

Purity97%

Vendors4 available

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

3 more vendors

Vendor	Country	$/g	Pack	Purity
Fluorochem UK	United Kingdom	$4.72	10 g	98%
A2B Chem LLC	United States	$5.60	5 g	98%
AA BLOCKS	United States	$7.60	5 g	98%

Chemical Identity

CAS121-46-0

PubChem CID8473

DTXSIDDTXSID1059523

FormulaC7H8

Mol. Weight92.14 g/mol

SMILESC1C2C=CC1C=C2

Data Sources

EPA CompTox (DSSTox) · DTXSID1059523Retrieved 2026-04-06
PubChem · compound 8473Retrieved 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

2,5-Norbornadiene (CAS 121-46-0) https://chemicalindependence.com/chemical/121-46-0/ EPA CompTox (DSSTox): DTXSID1059523. Retrieved 2026-04-06. https://comptox.epa.gov/dashboard/chemical/details/DTXSID1059523 PubChem: 8473. Retrieved 2026-04-06. https://pubchem.ncbi.nlm.nih.gov/compound/8473 EPA Chemical Data Reporting: 121-46-0. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting EPA Chemical Data Reporting: CAS 121-46-0. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting US Census international trade: HS 290219 for CAS 121-46-0. Reporting year: 2024. https://usatrade.census.gov/