Which lot is published?
Peptara Labs publishes one lot for this compound on its front page. Here it is, exactly as published. It says nothing about any other lot.
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[ seven columns, scroll sideways to read a whole row ]
| Lot | Method | Purity as published | Certificate | Tested | Laboratory named | Where this was read |
|---|---|---|---|---|---|---|
| PT1-260411-A | HPLC | 99.12 percent | COA-2026-7459 | June 2026 | Titreon Analytical, described on the live page as a third-party laboratory whose quality system is aligned to ISO/IEC 17025:2017, not itself accredited | peptaralabs.io front page, read 2026-09-07 |
The figure, the lot and the certificate number always go together. We don't average across a brand or stretch one lot into a claim about the compound. The release criterion of not less than 95.0 percent sits next to it so you can read the number in context.
That row covers one lot on one date. We didn't open the certificate itself, so we call it published and link it at the certificate index. No second outside lab covers this compound.
Why do we never show the figure alone?
A purity figure only makes sense next to its lot and certificate number. We never average it into a brand number or quote it for a lot the supplier didn't list. That rule comes from the supplier's own published set. The release criterion of not less than 95.0 percent sits beside it. More on the rule behind a published figure.
What can't this lot tell you?
Three things. It covers one lot on one date, and nothing about the compound in general. We didn't open the certificate, so we call it published, not read. And no second outside lab covers this compound: the supplier publishes second-lab reports for some other compounds, and none is for this one. Back to the scope table.
About the supplier we name
What is Peptara Labs, and what does it publish?
Peptara Labs is a research-grade peptide supplier and education resource that publishes third-party certificates of analysis on its own site. It lists sixteen research-grade products, including this one. We name it because its lot for this compound is the one we show.
Who tests the peptides Peptara Labs sells?
Titreon Analytical, described on the live page as a third-party laboratory whose quality system is aligned to ISO/IEC 17025:2017, not itself accredited. We always keep that qualifier with the name. A quality system aligned to a standard is not the same as holding it.
Is Peptara Labs the source of an approved PT-141 product?
No. Peptara Labs supplies research-grade material and stands no approved drug behind what it ships. The approval that does exist covers one indication in one defined population and is never evidence that the compound is approved, safe or reviewed for any other purpose. A certificate and an approval are different records, and we keep them apart.
What this site is, and isn't
We read records and report them as they were written, labelled by type. Supplier documents are reported in their own terms. Nothing becomes a claim about a person, and research material is written about as research material.
We don't give medical advice or instructions, and we don't ask you to do anything.