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Chlorothalonil

CAS 1897-45-6

1,3-Benzenedicarbonitrile, 2,4,5,6-tetrachloro-

Molecular structure of 1897-45-6
US productionNot reported
Import value, 2024$281M
Top sourceChina 31%

This chemical is listed as active in US commerce, but no company reported it to EPA’s survey for 2019 or 2023. Sites may have made or imported less than the threshold amount, or none.

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 292690 · basket

These shares come from HS customs code 292690, which covers 191 tracked chemicals in total. They estimate the category's origin mix, not this chemical specifically.

Source Countries
CN 31%ChinaIT 15%ItalyGB 14%United KingdomIN 11%IndiaJP 8%Japan

Why It Matters

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

Chemical Identity

CAS1897-45-6
PubChem CIDNot recorded
DTXSIDDTXSID0020319
FormulaC8Cl4N2
Mol. Weight265.9 g/mol
SMILESClC1=C(Cl)C(C#N)=C(Cl)C(C#N)=C1Cl

Data Sources

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Brief citations

Chlorothalonil (CAS 1897-45-6) https://chemicalindependence.com/chemical/1897-45-6/ EPA TSCA Inventory: CAS 1897-45-6. Retrieved 2026-10-04. https://www.epa.gov/tsca-inventory US Census international trade: HS 292690 for CAS 1897-45-6. Reporting year: 2024. https://usatrade.census.gov/