Asphalt, oxidized

CAS 64742-93-4

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$2.4B

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 271320 · narrow

EPA reports by year

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

These shares come from HS customs code 271320, which covers 4 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%CanadaCO 3%ColombiaVE 3%VenezuelaGR 2%GreeceES 1%Spain

Curacao
Switzerland
United Kingdom
Germany
Slovenia
Austria
Mexico
China

EPA-registered manufacturers (9)

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

Compagnie De Saint Gobain · FR France

Calumet

Hunt Consolidated

Lunday Thagard

Marathon Petroleum

Show all 9

Owens Corning

Saint-Gobain

Tricor Refining

Valero Marketing And Supply

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.

Cvr Energy

EPA-registered importers (4)

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

Sika Ag · CH Switzerland

Michelin North America

Michelin Tire

Sika

Why It Matters

Sectors

ConstructionMetals & MiningPlastics & 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

•Waterproofing agent in Asphalt Paving, Roofing, and Coating Materials Manufacturing (100%)Processing—incorporation into article

Chemical Identity

CAS64742-93-4

PubChem CIDNot recorded

DTXSIDDTXSID4028250

FormulaNot recorded

Mol. WeightNot recorded

SMILESNot recorded

Data Sources

EPA CompTox (DSSTox) · DTXSID4028250Retrieved 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

Asphalt, oxidized (CAS 64742-93-4) https://chemicalindependence.com/chemical/64742-93-4/ EPA CompTox (DSSTox): DTXSID4028250. Retrieved 2026-04-06. https://comptox.epa.gov/dashboard/chemical/details/DTXSID4028250 EPA Chemical Data Reporting: 64742-93-4. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting EPA Chemical Data Reporting: CAS 64742-93-4. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting US Census international trade: HS 271320 for CAS 64742-93-4. Reporting year: 2024. https://usatrade.census.gov/