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2,3,7,8-Tetrachlorodibenzo-p-dioxin

Drug ingredient

CAS 1746-01-6

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

Molecular structure of 1746-01-6
US productionNot reported
Import value, 2024$3.5B
Top sourceIreland 57%

This chemical is not on EPA’s Toxic Substances Control Act inventory, the list behind EPA’s production survey.

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 293299 · basket

These shares come from HS customs code 293299, which covers 229 tracked chemicals in total. They estimate the category's origin mix, not this chemical specifically.

Source Countries
IE 57%IrelandNL 24%NetherlandsCH 8%SwitzerlandCN 5%ChinaIT 2%Italy
2 FDA-registered drug labelers
Deseret Biologicals, Inc.
Professional Complementary Health Formulas

Why It Matters

Sectors
Health
Downstream Uses

Appears in 4 drug and cosmetic product listings (FDA).

  • •Household Detox
  • •Toxagent Detox 6035
  • •POP Detox 6045
  • •Tap Water Detox 6018
FDA Shortage Status
No FDA shortage records

Chemical Identity

CAS1746-01-6
PubChem CID15625
DTXSIDDTXSID2021315
FormulaC12H4Cl4O2
Mol. Weight322 g/mol
SMILESC1=C2C(=CC(=C1Cl)Cl)OC3=CC(=C(C=C3O2)Cl)Cl

Data Sources

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Brief citations

2,3,7,8-Tetrachlorodibenzo-p-dioxin (CAS 1746-01-6) https://chemicalindependence.com/chemical/1746-01-6/ PubChem: 15625. Retrieved 2026-04-07. https://pubchem.ncbi.nlm.nih.gov/compound/15625 FDA National Drug Code directory: CAS 1746-01-6. Retrieved 2026-04-25. https://open.fda.gov/data/ndc/ FDA National Drug Code directory: bulk match. Retrieved 2026-04-07. https://open.fda.gov/data/ndc/ US Census international trade: HS 293299 for CAS 1746-01-6. Reporting year: 2024. https://usatrade.census.gov/