Hydrocarbons, C3-4

CAS 68476-40-4

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$2.6B

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 271112, 271113, 271119, 271129 · basket

EPA reports by year

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

These shares come from HS customs code 271112, 271113, 271119, 271129, which covers 126 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 1%ChileKR 1%South Korea

Nigeria
United Kingdom
Algeria
Trinidad and Tobago
China
Italy
Dominican Republic
Czech Republic
Germany
United Arab Emirates
Poland
Guyana
Taiwan
Turkey
Netherlands
Philippines
Sweden
Ireland
Belgium
Qatar
Japan
Switzerland

EPA-registered manufacturers (7)

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

Chevron

Par Hawaii Refining

Phillips 66

Placid Refining

Show all 7

Shell Petroleum

Vertex Energy- Mobile Refinery

Domestic parents -- activity not disclosed (2)

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

Plains All American Pipeline

Shell

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 2 functional roles.

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

Chemical Identity

CAS68476-40-4

PubChem CIDNot recorded

DTXSIDDTXSID0028531

FormulaNot recorded

Mol. WeightNot recorded

SMILESNot recorded

Data Sources

EPA CompTox (DSSTox) · DTXSID0028531Retrieved 2026-04-06
EPA Chemical Data ReportingReporting year: 2023 · Retrieved 2026-10-04
EPA Chemical Data ReportingReporting year: 2019 · Retrieved 2026-10-04
US Census international tradeReporting year: 2024 · Retrieved 2026-10-04

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Brief citations

Hydrocarbons, C3-4 (CAS 68476-40-4) https://chemicalindependence.com/chemical/68476-40-4/ EPA CompTox (DSSTox): DTXSID0028531. Retrieved 2026-04-06. https://comptox.epa.gov/dashboard/chemical/details/DTXSID0028531 EPA Chemical Data Reporting: 68476-40-4. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting EPA Chemical Data Reporting: CAS 68476-40-4. Reporting year: 2019. https://www.epa.gov/chemical-data-reporting US Census international trade: HS 271112,271113,271119,271129 for CAS 68476-40-4. Reporting year: 2024. https://usatrade.census.gov/