Dr.NateNeph said:COA red flags for certificates of analysis — here's what to look for when reviewing a Certificate of Analysis: No HPLC data: If there's no…
This is my experience too, for whatever a second data point is worth. Nothing to add that would improve it.
HPLC_Greg said:My vendor review relevant to certificates of analysis: ordered 4 times from my current compounder.
Saving this. It is the first explanation that did not require me to already understand it.
From the other side of the consultation, briefly.
Reconstituted peptide stability data for certificates of analysis: I had Janoshik test my reconstituted vial at day 1, day 14, and day 28 stored in the refrigerator.
Day 1: 99.6% purity
Day 14: 98.1% purity
Day 28: 98.4% purity
Minimal degradation over 28 days when properly refrigerated. This confirms the standard 28-day beyond-use date is appropriate. Beyond 28 days, I'd reconstitute a fresh vial to be safe.
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Shop Reference StandardsPedsEndoPhilly said:Reconstituted peptide stability data for certificates of analysis: I had Janoshik test my reconstituted vial at day 1, day 14, and day 28 stored in…
Adding a me-too, because a thread of one person's experience is not much use. The detail I would add is minor and it is already implied above.