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2-Thiobarbituric acid

CAS 504-17-6

4,6(1H,5H)-Pyrimidinedione, dihydro-2-thioxo-

Molecular structure of 504-17-6
US productionNot reported
Import value, 2024$2M
Top sourceSingapore 66%

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 293354 · basket

These shares come from HS customs code 293354, which covers 13 tracked chemicals in total. They estimate the category's origin mix, not this chemical specifically.

Source Countries
SG 66%SingaporeHU 25%HungaryDE 6%GermanyCN 2%China

Why It Matters

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

Chemical Identity

CAS504-17-6
PubChem CIDNot recorded
DTXSIDDTXSID7060124
FormulaC4H4N2O2S
Mol. Weight144.15 g/mol
SMILESO=C1CC(=O)NC(=S)N1

Data Sources

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Brief citations

2-Thiobarbituric acid (CAS 504-17-6) https://chemicalindependence.com/chemical/504-17-6/ EPA TSCA Inventory: CAS 504-17-6. Retrieved 2026-10-04. https://www.epa.gov/tsca-inventory US Census international trade: HS 293354 for CAS 504-17-6. Reporting year: 2024. https://usatrade.census.gov/