Hydrocarbons, C4, ethylene-manuf.-by-product

CAS 68476-52-8

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$1.1B

Top sourceCanada 94%

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 271113, 271114, 271119, 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 271113, 271114, 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 94%CanadaKR 2%South KoreaCL 2%Chile

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

EPA-registered manufacturers (10)

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

Government Of Abu Dhabi · AE United Arab Emirates

Indorama Netherlands Bv · NL Netherlands

Chevron Phiillips Chemical

Chevron Phillips Chemical

Dow Chemical

Show all 10

Formosa Plastics Corporation, U.S.A.

Indorama Ventures Usa Holdings

Lotte Chemical Usa

Lyondell Chemical

Nc Holdings Usa

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.

Motiva Enterprises

Tpc Group

EPA-registered importers (1)

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

Government Of Abu Dhabi · AE United Arab Emirates

Why It Matters

Sectors

Core 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

•Intermediate in Petrochemical Manufacturing (100%)Processing as a reactant

Chemical Identity

CAS68476-52-8

PubChem CIDNot recorded

DTXSIDDTXSID9028540

FormulaNot recorded

Mol. WeightNot recorded

SMILESNot recorded

Data Sources

EPA CompTox (DSSTox) · DTXSID9028540Retrieved 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

Hydrocarbons, C4, ethylene-manuf.-by-product (CAS 68476-52-8) https://chemicalindependence.com/chemical/68476-52-8/ EPA CompTox (DSSTox): DTXSID9028540. Retrieved 2026-04-06. https://comptox.epa.gov/dashboard/chemical/details/DTXSID9028540 EPA Chemical Data Reporting: 68476-52-8. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting EPA Chemical Data Reporting: CAS 68476-52-8. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting US Census international trade: HS 271113,271114,271119,271129 for CAS 68476-52-8. Reporting year: 2024. https://usatrade.census.gov/