Can I See the Certificate for the Lot That Will Ship?

Yes — and it is the right question to ask of any supplier before paying, not after the parcel arrives. The useful version of the question is narrower than it first looks: not “do you have a COA”, but “is the report you are showing me the report for the lot that will ship to me, and can I check it with the laboratory rather than with you”.

What to look for before ordering

• A report per lot, published rather than on request. Every lot we list has its own third-party report, and they are all on the lab results page together with the task number for each.
• A task or report number you can open at the laboratory. Our lots are tested by Janoshik Analytical, and each listing carries a verification link to the laboratory’s own copy. A PDF supplied only by the seller is a document the seller controls; the laboratory’s copy is not. How to verify a report yourself walks through the comparison.
• The figures on the product page matching the report. Purity and measured content per vial should be the same numbers in both places. Where they differ, the report is the fact and the page is the claim.
• Both purity and content. Purity alone leaves open how much peptide is in the vial — see net peptide content.

The question that actually matters

A supplier can hold several lots of the same product at once. A published report proves that some lot was tested; it does not by itself tell you which vial you will receive. So the question to put before paying is: which lot number will ship for this order, and is this the report for that lot?

It is a reasonable question, it is answerable in one line, and the answer tells you something about the supplier regardless of which lot it names. A supplier who cannot say which lot will ship cannot tie any report to your order.

Checks that take a minute each

• Lot number on the report matches the lot you were told will ship, character for character.
• Date on the report is plausible for a lot still in stock, rather than years old.
• Compound and quantity on the report match the product, not a similar one.
• The chromatogram is included, not only a summary table — how to read it.
• Observed and expected mass are given as figures, not as the word “confirmed” — and note that a purity pass and an identity pass answer different questions.
• The laboratory’s copy opens and says the same thing as the PDF you were sent.

When the answer is “on request”

“COA available on request” is not the same as a published report, and it is worth asking what arrives: a report for your lot, a report for some lot, or a certificate of conformance written by the seller. Which quality claims mean something covers the distinctions, and how to spot a fabricated certificate covers what to look at when a document does arrive.

For repeat and bulk orders

Ask what happens when the lot changes: whether a new report is issued, and whether you are told. On a repeat order the material can change without anything else on the listing changing — the six checks for a new lot covers what to compare. For bulk enquiries we quote with the lot numbers that would ship, so the certificates can be checked before the order is placed rather than after.

All products referenced on this site are supplied for laboratory research use only, and are not for human or veterinary use.