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    What actually makes a supplier trustworthy? A working checklist

    Let's build the community checklist. My starting list for judging a research-compound supplier:

  • Per-batch COA, with the batch number matching the vial.
  • Real chromatograms, not just a purity number on letterhead.
  • Mass-spec identity confirmation, not purity alone.
  • Sensible packaging and cold-chain for the compound.
  • Clear research-use-only labelling and no human-use claims.
  • Responsive support when you query a batch.

    • What would you add, and what's a genuine red flag versus a nitpick? Let's get this to something a newcomer can actually use.

    Solid list. I'd promote "real chromatograms, not just a number" to the top — it's the single line that separates a supplier showing its working from one showing its logo. Everything else flows from that.

    Add: packaging that matches the compound's cold-chain needs. A perfect COA means little if the vials arrived cooked. Red flag for me is a padded envelope where an insulated mailer belonged.

    Genuinely useful checklist from the community — and a fair bar to be held to. Per-batch COA with matching batch number, chromatogram and method shown, mass-spec identity, cold-chain-appropriate packaging, unambiguous research-use-only labelling. That's the standard we aim to meet; hold us to it.

    Folding it all in: chromatogram-first, identity not just purity, cold-chain matched to the compound, RUO labelling clear, responsive support. That's the consensus checklist — I'll write it up clean as a pinned-worthy reference.

    Folding the recent additions in: chromatogram-first, identity not just purity, cold-chain matched to the compound (loggers on long routes are fair to ask for), clear RUO labelling, responsive support. This checklist is becoming the reference — thank you all.

    Want to join the discussion?

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