Gases, petroleum, extractive, C3-5, butene-isobutylene-rich

CAS 68477-42-9

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$404M

Top sourceCanada 90%

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 271114, 271129 · basket

EPA reports by year

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

These shares come from HS customs code 271114, 271129, which covers 115 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).

CA 90%CanadaCL 4%ChileMX 1%MexicoKR 1%South Korea

Italy
China
United Kingdom
Czech Republic
Poland
Guyana
United Arab Emirates
Turkey
Germany
Ireland
Netherlands
Belgium
Japan
Trinidad and Tobago
Austria

EPA-registered manufacturers (6)

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

Pdvsa Petroleos S A · VE Venezuela

Hf Sinclair

Lyondell Chemical

Martinez Refining

Pdv Holding

Show all 6

Tpc Group

Why It Matters

Sectors

EnergyCore 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 2 sectors as 1 functional role.

•Intermediate in Petroleum Refineries (100%)Processing—incorporation into formulation, mixture, or reaction product
•Intermediate in Petrochemical Manufacturing (100%)Processing as a reactant

Chemical Identity

CAS68477-42-9

PubChem CIDNot recorded

DTXSIDDTXSID3028556

FormulaNot recorded

Mol. WeightNot recorded

SMILESNot recorded

Data Sources

EPA CompTox (DSSTox) · DTXSID3028556Retrieved 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

← Back to Dashboard ← Back to Energy

Brief citations

Gases, petroleum, extractive, C3-5, butene-isobutylene-rich (CAS 68477-42-9) https://chemicalindependence.com/chemical/68477-42-9/ EPA CompTox (DSSTox): DTXSID3028556. Retrieved 2026-04-06. https://comptox.epa.gov/dashboard/chemical/details/DTXSID3028556 EPA Chemical Data Reporting: 68477-42-9. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting EPA Chemical Data Reporting: CAS 68477-42-9. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting US Census international trade: HS 271114,271129 for CAS 68477-42-9. Reporting year: 2024. https://usatrade.census.gov/