Sourcing · Vendor reports

Revisiting: Filing a first vendor report: a worked example

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

r.szaboTL2 Moderator8 May 2025#1

On the subject in the title: Revisiting: Filing a first vendor report: a worked example Working notes rather than a conclusion.

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

Compound: semaglutide
Independent testing: VendorInvestigate
Method as reported: reversed-phase HPLC, 214 nm
Result: 95.9% area
Certificate figure for the same lot: 98%

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 15mo

m.restrepoTL2 Moderator7 Jul 2025#2

Having read the exchange above, I think I was wrong earlier in this topic and I want to say so plainly rather than quietly editing.

The correction was fair and I had been repeating something I had not checked carefully enough.

13 likes 13mo

c.inglethorpeTL3Regular19 Aug 2025 · edited#3

post #2 answers the question as asked. The question underneath it is different.

Lot matching: confirm the lot number on the certificate matches the lot number on the vial. A result from a different lot is not evidence about your vial.

27 likes 11mo

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