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Difethialone

CAS 104653-34-1

Molecular structure of 104653-34-1
US productionNot reported
Import value, 2024$6.4B
Top sourceSingapore 36%

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 293499 · basket

These shares come from HS customs code 293499, which covers 575 tracked chemicals in total. They estimate the category's origin mix, not this chemical specifically.

Source Countries
SG 36%SingaporeIE 23%IrelandCN 11%ChinaCH 6%SwitzerlandIN 5%India

Why It Matters

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

Chemical Identity

CAS104653-34-1
PubChem CIDNot recorded
DTXSIDDTXSID4032374
FormulaC31H23BrO2S
Mol. Weight539.49 g/mol
SMILESOC1=C(C2CC(CC3=C2C=CC=C3)C2=CC=C(C=C2)C2=CC=C(Br)C=C2)C(=O)SC2=CC=CC=C12

Data Sources

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Brief citations

Difethialone (CAS 104653-34-1) https://chemicalindependence.com/chemical/104653-34-1/ EPA CompTox (DSSTox): 104653-34-1. Retrieved 2026-04-29. https://comptox.epa.gov/dashboard/chemical/details/DTXSID4032374 US Census international trade: HS 293499 for CAS 104653-34-1. Reporting year: 2024. https://usatrade.census.gov/