1,1,1-Trichloroethane

CAS 71-55-6

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.

Top sourceNo public record

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.

Where It Comes From

Customs basis: HS 382714 · exact

EPA reports by year

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

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.

Westlake

Why It Matters

Sectors

EnergyPlastics & 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 2 sectors as 1 functional role.

•Intermediate in Plastics Material and Resin ManufacturingProcessing as a reactant
•Intermediate in Industrial Gas ManufacturingProcessing as a reactant

Chemical Identity

CAS71-55-6

PubChem CID6278

DTXSIDDTXSID0021381

FormulaC2H3Cl3

Mol. Weight133.4 g/mol

SMILESCC(Cl)(Cl)Cl

Data Sources

EPA CompTox (DSSTox) · DTXSID0021381Retrieved 2026-04-06
PubChem · compound 6278Retrieved 2026-04-06
EPA Chemical Data ReportingReporting year: 2023 · Retrieved 2026-10-04
EPA Chemical Data ReportingReporting year: 2023 · Retrieved 2026-10-04

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Brief citations

1,1,1-Trichloroethane (CAS 71-55-6) https://chemicalindependence.com/chemical/71-55-6/ EPA CompTox (DSSTox): DTXSID0021381. Retrieved 2026-04-06. https://comptox.epa.gov/dashboard/chemical/details/DTXSID0021381 PubChem: 6278. Retrieved 2026-04-06. https://pubchem.ncbi.nlm.nih.gov/compound/6278 EPA Chemical Data Reporting: 71-55-6. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting EPA Chemical Data Reporting: CAS 71-55-6. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting