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One lot is one lot: when a report becomes a pattern

Sourcing › Vendor reports documentation quality certificate of analysis batch & lot numbers disputed Janoshik Analytical third-party testing

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Solved by c.chowdhury in post #2

On the opening post — agreed on the reasoning, with one qualification. What "verified" means on our pages: specific lots were independently measured on stated dates by named services and results were consistent with the supplier's documentation. It is not a recommendation and does not extend to untested lots.

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NorringtonTL3Regular15 Nov 2024#1

Posting this under the heading it deserves: One lot is one lot: when a report becomes a pattern Everything below is what sits behind that.

Structured report rather than an opinion, following the format the maintainers asked for.

Compound: tirzepatide
Independent testing: Medutest
Method as reported: reversed-phase HPLC, 214 nm
Result: 96.9% area
Certificate figure for the same lot: 97.5%

I am not drawing a conclusion about the supplier from one lot and I would ask that nobody else does either. I am adding a data point to a record.

8 likes 20mo

c.chowdhuryTL2 Moderator Solution6 Mar 2025#2

On the opening post — agreed on the reasoning, with one qualification.

What "verified" means on our pages: specific lots were independently measured on stated dates by named services and results were consistent with the supplier's documentation. It is not a recommendation and does not extend to untested lots.

12 likes 17mo

r.mcalisterTL3Regular25 May 2025#3

Norrington, post #1: Posting this under the heading it deserves: One lot is one lot: when a report becomes a pattern Everything below is what sits behind that. Structured report rather than an opinion, following the format the maintainers asked for. Compound: tirzepatide Independent testing: Medutest Method as reported: reversed-phase HPLC, 214 nm Result:… Go to post

Pattern across lots: a single result is a data point. Three or four results from the same supplier showing a consistent pattern becomes a record worth discussing. Two results that disagree might just be measurement variation.

0 likes in reply to #1 14mo

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