5-Ethylidene-2-norbornene

CAS 16219-75-3

Used in 1 industrial sector tracked by the EPA.

US production48.4M lb

Import value, 2024$90M

Import volumeCBI

Confidential Business Information. The EPA withholds this volume because publishing it could reveal the reporting company's trade secrets.

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. 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 48.4M lb · 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 (1)

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

Nippon Chemical Texas

Domestic parents -- activity not disclosed (3)

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

Arlanxeo Usa

Sojitz Corporation Of America

Teckrez

EPA-registered importers (2)

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

Ineos Oxide

Lion Copolymer Holdings

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

Used in 3 sectors as 3 functional roles.

•Catalyst in Synthetic Rubber ManufacturingProcessing as a reactant
•Monomers in Synthetic Rubber Manufacturing (100%)Processing as a reactant
•Intermediate in Synthetic Rubber Manufacturing (99%)Processing as a reactant
•Intermediate in Plastics Material and Resin Manufacturing (1%)Processing as a reactant
•Monomers in Rubber Product Manufacturing (100%)Processing—incorporation into formulation, mixture, or reaction product

Vendor Pricing

$0.13/gAaron Chemicals LLC

CountryHong Kong

Pack$67.00 / 500 g

Purity98%

Vendors2 available

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

1 more vendor

Vendor	Country	$/g	Pack	Purity
AA BLOCKS	United States	$0.26	100 g	98%

Chemical Identity

CAS16219-75-3

PubChem CID27756

DTXSIDDTXSID1025306

FormulaC9H12

Mol. Weight120.19 g/mol

SMILESCC=C1CC2CC1C=C2

Data Sources

EPA CompTox (DSSTox) · DTXSID1025306Retrieved 2026-04-06
PubChem · compound 27756Retrieved 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

5-Ethylidene-2-norbornene (CAS 16219-75-3) https://chemicalindependence.com/chemical/16219-75-3/ EPA CompTox (DSSTox): DTXSID1025306. Retrieved 2026-04-06. https://comptox.epa.gov/dashboard/chemical/details/DTXSID1025306 PubChem: 27756. Retrieved 2026-04-06. https://pubchem.ncbi.nlm.nih.gov/compound/27756 EPA Chemical Data Reporting: 16219-75-3. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting EPA Chemical Data Reporting: CAS 16219-75-3. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting US Census international trade: HS 290219 for CAS 16219-75-3. Reporting year: 2024. https://usatrade.census.gov/