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4,5-Dimethylthiazole

CAS 3581-91-7

Molecular structure of 3581-91-7
US productionNot reported
Import value, 2024$447M
Top sourceChina 31%

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 293410 · basket

These shares come from HS customs code 293410, which covers 83 tracked chemicals in total. They estimate the category's origin mix, not this chemical specifically.

Source Countries
CN 31%ChinaDE 25%GermanyMX 19%MexicoJP 13%JapanIN 5%India

Why It Matters

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

Chemical Identity

CAS3581-91-7
PubChem CIDNot recorded
DTXSIDDTXSID40189348
FormulaC5H7NS
Mol. Weight113.18 g/mol
SMILESCC1=C(C)N=CS1

Data Sources

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Brief citations

4,5-Dimethylthiazole (CAS 3581-91-7) https://chemicalindependence.com/chemical/3581-91-7/ EPA CompTox (DSSTox): 3581-91-7. Retrieved 2026-04-29. https://comptox.epa.gov/dashboard/chemical/details/DTXSID40189348 US Census international trade: HS 293410 for CAS 3581-91-7. Reporting year: 2024. https://usatrade.census.gov/