Traceability sounds administrative, but it is the backbone of trust in a research material. It is what connects a vial in hand to everything known about it: which batch it is, which tests were done on it, when, and which documents belong with it. Without that chain a certificate of analysis is a loose sheet of paper that demonstrably belongs to no vial. With that chain, every vial can be traced back to exactly what was established.
The chain in four links
The link runs in four steps, and each step points to the next.
The vial carries a batch number on its label. That is the entry point. That same number should reappear unambiguously in the documentation; if it differs, the certificate does not belong to this vial.
The batch number points to a released batch record: the internal registration of exactly this production and testing round. A batch enters that record, and thereby the catalogue, only after it has been assessed and approved.
The batch record in turn links internally to two layers of data: the analytical lab testing by the producing laboratory, and Peptalis's own verification. Together they form the full picture of what was measured and what Peptalis added to it. What is tied to the vial and travels with the order is the Peptalis release report: Peptalis's own Certificate of Analysis, in the language of the order.
And each of those documents carries a test date, which places the measurements in time. From the number on the vial it is therefore possible to trace back to exactly what was tested and when.
Where Peptalis obtains its peptides
Peptalis obtains peptides from specialised laboratories and manufacturers that deliver to strict analytical specifications, rather than from generic suppliers, and selection begins with a strict requirement: extensive analytical lab testing. Before a peptide is considered at all, the supplying party must demonstrate what it delivers, with methods such as identity by mass spectrometry and purity by HPLC, and the accompanying analytical documentation. That lab testing is the first layer of data, and it is a selection criterion, not a formality after the fact.
That analytical data from the lab is an internal source. It feeds the assessment, but it is not the document that travels with an order; what the buyer receives is Peptalis's own Certificate of Analysis.
What the Peptalis release report adds
Every batch passes through a fixed chain at Peptalis. The first layer is the laboratory's analytical documentation. Then comes an internal assessment following a fixed procedure: checks on identity, purity and stability, visual inspection and vial integrity, and where relevant a reconstitution test. Only when those steps hold does Peptalis issue its own release report: on its own letterhead, with the lab data and the Peptalis verification layer, signed by Peptalis Quality, in Dutch or English according to the order. Where Peptalis sees reason to, a batch can additionally be tested at an independent European laboratory; that report is an internal control instrument, not a public seal of approval. A batch that does not meet the standard is rejected and does not enter the catalogue.
The gain is that the certainty does not rest on a single unverified source. Two independent measurements that agree say more than one.
What ships with every order
Traceability is only useful if the documentation accompanies the vial. At Peptalis, every order ships as standard with the Peptalis release report (the own Certificate of Analysis, in Dutch or English), the batch number and the storage conditions. The analytical lab testing behind the release stays an internal source; what the buyer holds is the verified Peptalis document. With those, the chain from vial to batch to release report can be followed in full: a fact that can be checked, not a promise.
The batch lookup
Entering a batch code or product name in the batch lookup opens the corresponding Peptalis release report directly. A vial can thus be tied to its documentation without having to dig up an order confirmation, and the report can be shared with a colleague or co-reviewer. When a link is missing (a vial without a traceable batch number, a certificate without a test date) the chain breaks, and traceability is precisely the antidote to that break.