Every molecule page lists manufacturers in a fixed order. This page states how that order is produced so you can judge it, and disagree with it, on the evidence.
No supplier pays to appear on this site, and no supplier pays to appear higher. We do not sell listings, leads or introductions. The directory exists because it helps buyers find us, and the research we sell is what buyers pay for.
Inside a supplier map, each company is placed in one of three tiers. A Strong candidate holds an in-market credential and has a clean recent inspection. A Promising company is credentialed, but a gap keeps it off the top tier. Insufficient evidence means the company was surfaced but there is not yet enough on the public record to place it.
Traders, agents and distributors never receive a tier. They are sourcing routes rather than manufacturing sites, so a tier that assesses a plant would be meaningless for them.
We never publish who is shipping to whom. Trade data appears in aggregate only, never as a single shipment or a named counterparty. Where a credential could not be confirmed against the raw regulator file, we leave it off the page rather than guess. Sanctioned companies are excluded.
Pages are built from a pinned warehouse snapshot dated 9 July 2026. Each figure on a page carries the register it came from and the date that register was read. Read how we count our figures.