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Diphacinone

CAS 82-66-6

Molecular structure of 82-66-6
US productionNot reported
Import value, 2024$16M
Top sourceChina 55%

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 291439 · basket

These shares come from HS customs code 291439, which covers 86 tracked chemicals in total. They estimate the category's origin mix, not this chemical specifically.

Source Countries
CN 55%ChinaIN 26%IndiaIT 7%ItalyDE 5%GermanyGB 2%United Kingdom

Why It Matters

No EPA sector or FDA product records name a use for this chemical.

Chemical Identity

CAS82-66-6
PubChem CIDNot recorded
DTXSIDDTXSID4032378
FormulaC23H16O3
Mol. Weight340.378 g/mol
SMILESO=C(C(C1=CC=CC=C1)C1=CC=CC=C1)C1C(=O)C2=C(C=CC=C2)C1=O

Data Sources

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Brief citations

Diphacinone (CAS 82-66-6) https://chemicalindependence.com/chemical/82-66-6/ EPA CompTox (DSSTox): 82-66-6. Retrieved 2026-04-29. https://comptox.epa.gov/dashboard/chemical/details/DTXSID4032378 US Census international trade: HS 291439 for CAS 82-66-6. Reporting year: 2024. https://usatrade.census.gov/