A certificate is useful only when you can link it to the material
Finding a certificate with the right compound name is a starting point, not the end of a batch check. A practical record should connect the order, the received vial and the report used to assess it. Otherwise a genuine report may be filed against the wrong material.
This is documentary traceability. It is not the same as metrological traceability, which NIST describes in terms of a documented chain relating a measurement result to a reference, with measurement uncertainty accounted for. NIST — Metrological traceability.
The four-way match
| Record | Compare these fields | When to pause |
|---|---|---|
| Order or delivery note | Product, size, quantity and reference | The delivered material does not match the order |
| Vial label | Product identity, size and lot identifier | A label is missing or an identifier cannot be read |
| Certificate | Lot/sample reference, result and report date | The certificate names another batch or ambiguous sample |
| Supplier clarification | Explanation of any mapping between sample and lot | The explanation does not connect the actual vial to the test |
A laboratory sample number and a commercial batch number need not be identical. What matters is a documented explanation of their relationship. Do not edit the report to make them look identical.
A suggested receiving record
Create one record for each distinct batch received. Include the order reference, product name, stated quantity, supplier lot, laboratory sample ID, report filename, report date, date received and the person who checked it. Add a free-text discrepancy field and a link to any correspondence.
For example, “Lot AMP-EXAMPLE-A; laboratory sample LAB-EXAMPLE-7; linked by supplier reply dated 25 October” is clearer than “COA checked”. These identifiers are illustrative only. Do not reuse them as real inventory records.
Handle missing or conflicting information explicitly
A cautious workflow is to mark the batch “documentation query” in your own laboratory record until the discrepancy is resolved. Keep the original labels, report and photographs together. Explain exactly which field conflicts; a precise query usually produces a more useful answer than asking for a generic replacement certificate.
- Do not substitute a certificate from another purchase because the product name matches.
- Do not assume an older archive report is the current dispatch batch.
- Record who supplied a clarification and when.
- Preserve superseded files with a version note rather than silently overwriting them.
- Let your laboratory’s authorised person decide whether the available evidence meets its acceptance requirements.
Find documents without making a blanket claim
The AllMyPeptides certificate library is a starting point for available records. If the batch you received is not identifiable there, use Contact and include your order reference, product, size and visible batch number. Avoid posting personal order details in public comments.
This checklist does not claim that every archived document is current or that a certificate establishes clinical suitability. It is a method for organising the evidence you actually have. Pair it with the purity versus content guide when interpreting the numbers.
Sources and scope
Sources support the specific concepts cited above; they do not endorse this shop or certify its stock. Check the original documentation for your material and laboratory purpose. About this library and its limitations.
A FEW MORE ANSWERS
Common questions
Must the sample ID and lot number be identical?
No, but there should be a documented connection explaining which batch the tested sample represents.
Can an old certificate be used for a new order?
Only when the actual supplied batch is demonstrably covered. Matching product names alone is not enough.