Topramezone

CAS 210631-68-8

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.

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

Country of origin for US imports, from Census customs data (2024).

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

Finland
Netherlands
Canada
Indonesia
Mexico
Taiwan
South Korea
Austria
Croatia
Sweden
Ukraine
Denmark
Israel
Czech Republic
New Zealand
Hong Kong
Kyrgyzstan
Australia
Portugal
South Africa
Poland
Slovenia
Brazil
Slovakia
Vietnam
Latvia
Malta
Hungary
Romania
Kenya
Belarus
Russia
Turkey
Norway

Why It Matters

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

Chemical Identity

CAS210631-68-8

PubChem CIDNot recorded

DTXSIDDTXSID0034722

FormulaC16H17N3O5S

Mol. Weight363.39 g/mol

SMILESCN1N=CC(C(=O)C2=C(C)C(C3=NOCC3)=C(C=C2)S(C)(=O)=O)=C1O

Data Sources

EPA CompTox (DSSTox) · DTXSID0034722Retrieved 2026-04-29
US Census international tradeReporting year: 2024 · Retrieved 2026-10-04

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Brief citations

Topramezone (CAS 210631-68-8) https://chemicalindependence.com/chemical/210631-68-8/ EPA CompTox (DSSTox): 210631-68-8. Retrieved 2026-04-29. https://comptox.epa.gov/dashboard/chemical/details/DTXSID0034722 US Census international trade: HS 293499 for CAS 210631-68-8. Reporting year: 2024. https://usatrade.census.gov/