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Precursor Chemicals

Tracing the origin of precursor chemicals used in fentanyl production

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Jan 5, 2026
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How do fentanyl synthesis routes differ between powder fentanyl, carfentanil, and other analogs?

Fentanyl and its analogs share a common N-phenethylpiperidinyl-amide core but diverge in synthesis where chemists modify the acyl group at the piperidine 4-position or the phenethyl and piperidine rin...

Jan 5, 2026

How do U.S. agencies determine the country of origin for seized fentanyl?

U.S. agencies determine the country of origin for seized fentanyl using a mix of chemical forensics, supply‑chain and shipping records, precursor chemical tracing, financial intelligence, and multinat...