Sellers of chemicals used to make fentanyl

36 sellers, 168 listing records, newest fetch 2026-09-19. 1 seller lists a step A or B chemical with its Chemical Abstracts Service (CAS) number printed on the page. The most route-focused seller has 4.9% of its stored listings in the route, so every seller here is a broad catalogue that includes route chemicals. A listing is not a sale.

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Sellers are ranked by, in order: not a catalogue or research supplier, the strongest route step listed, a CAS number printed on the seller's page, route steps covered, then newest listing. Route steps: A end intermediates, B N-phenethyl and anilinopiperidine intermediates, C the 4-piperidone family, D acylating agents, E phenethyl halides. Evidence: "CAS on page" means the page prints the chemical's CAS number; "name only" means the listing names the chemical without one, matched by a scored reading or a fixed rule. Seller type is a model's reading of the seller's name and address, and a person has not checked it. The marketplace prints no posting date, so the newest fetch is when the crawl last read a listing. Check each chemical's control status for the country and date before acting on a line.