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Mesosulfuron-methyl

CAS 208465-21-8

Molecular structure of 208465-21-8
US productionNot reported
Import value, 2024$2.0B
Top sourceIreland 63%

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 293590 · basket

These shares come from HS customs code 293590, which covers 182 tracked chemicals in total. They estimate the category's origin mix, not this chemical specifically.

Source Countries
IE 63%IrelandSG 14%SingaporeIN 7%IndiaCN 7%ChinaCH 2%Switzerland

Why It Matters

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

Chemical Identity

CAS208465-21-8
PubChem CIDNot recorded
DTXSIDDTXSID6034712
FormulaC17H21N5O9S2
Mol. Weight503.5 g/mol
SMILESCOC(=O)C1=C(C=C(CNS(C)(=O)=O)C=C1)S(=O)(=O)NC(=O)NC1=NC(OC)=CC(OC)=N1

Data Sources

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Brief citations

Mesosulfuron-methyl (CAS 208465-21-8) https://chemicalindependence.com/chemical/208465-21-8/ EPA CompTox (DSSTox): 208465-21-8. Retrieved 2026-04-29. https://comptox.epa.gov/dashboard/chemical/details/DTXSID6034712 US Census international trade: HS 293590 for CAS 208465-21-8. Reporting year: 2024. https://usatrade.census.gov/