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Supplier qualification

We evaluate. Each supplier is tested on what it actually ships, not on what its certificate says.

Very few suppliers deliver genuinely high-quality material, and most are judged on a single purity figure. That figure says how clean a peptide is. It does not say whether it is the right molecule or how much of it is in the vial.

Verifying a supplier from outside is hard: there is no access to the plant, the certificate is issued by the party being checked, and one good batch says little about the next.

Three things we judge

  • Its own material. Data measured by an independent laboratory on material the supplier actually ships.
  • Its synthesis route. Which route it would choose for the compound, and which building blocks it would order.
  • Maker or reseller. Whether it makes the compound in-house or resells material made elsewhere.

Makers answer, resellers deflect

We ask every candidate which route they would choose and which building block they would order. A supplier who makes the compound can explain both. When nobody can answer questions about route, building blocks or impurities, the supplier is reselling, even if it presents itself as the maker.

Figure 1. Several routes to one compound, schematically. The route a supplier names shows whether it makes the compound itself. Illustration without real data.

Scored over time, not once

One good batch says little about the next. That is why every batch is tested independently and every supplier is scored over time. Results are kept per supplier and per compound, failures as well as passes, so each new decision starts better informed.

The aim is a professional primary supplier for each compound, and a real backup for each.

What goes wrong at the supplierThe route is decided by the molecule
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Frequently asked questions

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On material it actually ships. An independent laboratory measures identity and purity, and structure and content where the compound calls for it.

The route decides which impurities can form and how hard they are to remove. A supplier who can explain its route and its building blocks makes the compound; one who cannot is reselling.

No. One good batch says little about the next, so every batch is tested and every supplier is scored over time.

Yes. Failures are recorded alongside passes, per supplier and per compound.