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diphenyltrichloroethane

Drug ingredient

CAS 2971-22-4

This chemical is an active pharmaceutical ingredient used in FDA-regulated drugs.

Molecular structure of 2971-22-4
US productionNot reported
Import value, 2024$108M
Top sourceChina 77%

EPA lists this chemical as inactive, meaning no company reported making, importing or processing it in the US from 2006 to 2016.

Why supply is unknown

Production is reported production, not a complete census of factories. Import value and source-country shares describe a shared customs category, not a separate chemical measurement.

Where It Comes From

Customs basis: HS 290399 · basket

These shares come from HS customs code 290399, which covers 178 tracked chemicals in total. They estimate the category's origin mix, not this chemical specifically.

Source Countries
CN 77%ChinaIN 7%IndiaDE 7%GermanyJP 5%JapanIT 2%Italy
1 FDA-registered drug labeler
Professional Complementary Health Formulas

Why It Matters

Sectors
Health
Downstream Uses

Appears in 1 drug and cosmetic product listings (FDA).

  • •Vaccinosis Nosode 4004
FDA Shortage Status
No FDA shortage records

Chemical Identity

CAS2971-22-4
PubChem CID18085
DTXSIDDTXSID7051973
FormulaC14H11Cl3
Mol. Weight285.6 g/mol
SMILESC1=CC=C(C=C1)C(C2=CC=CC=C2)C(Cl)(Cl)Cl

Data Sources

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Brief citations

diphenyltrichloroethane (CAS 2971-22-4) https://chemicalindependence.com/chemical/2971-22-4/ PubChem: 18085. Retrieved 2026-04-07. https://pubchem.ncbi.nlm.nih.gov/compound/18085 EPA TSCA Inventory: CAS 2971-22-4. Retrieved 2026-04-24. https://www.epa.gov/tsca-inventory FDA National Drug Code directory: bulk match. Retrieved 2026-04-07. https://open.fda.gov/data/ndc/ US Census international trade: HS 290399 for CAS 2971-22-4. Reporting year: 2024. https://usatrade.census.gov/