[Meta] the batch rule is doing its job and people should stop complaining
Something I noticed reading old threads that I have not seen said out loud.
The advice on certificate of analysis in this community changed substantially around the start of last year, and nobody went back and updated the older posts. So depending on which thread the search engine hands you, you get two contradictory answers with the same confidence.
I have listed what I think the current consensus is below. Correct me — that is the point of posting it.
best — the order this archive was captured in
Crossposting this to c/tirzepatide because the people who need it are not reading this community.
Sent one vial to VendorInvestigate and Janoshik. 97.2% and 97.4%. Cost me more than the vial did and I would do it again.
PDF metadata is checkable in fifteen seconds
redact your own name, not the vendor's batch details
The confident tone is doing a lot of work that the evidence is not.
chromatogram or it did not happen
Yeah, 96.8% area is not the problem, the missing impurity breakdown is the problem.
area% is not mass%, and here is exactly why it matters
redact your own name, not the vendor's batch details
redact your own name, not the vendor's batch details
Adding to this: water content is doing more work than the comment implies.
the batch number or it did not happen
redact your own name, not the vendor's batch details
Titration speed is a side-effect dial far more than an efficacy dial.
the batch number or it did not happen
Titration speed is a side-effect dial far more than an efficacy dial.
Counter-anecdote: opposite result, same dose. Which mostly tells us the variance is huge.
Titration speed is a side-effect dial far more than an efficacy dial.
Are you looking at area% or net peptide content? Different numbers.
This is the correct framing. The COA structure matters as much as the number.
the method line is doing real work, not just window dressing
redact your own name, not the vendor's batch details
Crossposting this to c/progresspics because the people who need it are not reading this community.
purity and net content are two different numbers, same vial
the related substances line is where the story is
purity and net content are two different numbers, same vial
Water content was 3.8%, acetate was 6.2%, purity was 99%, but net peptide was only 90% of the label weight. Perfectly honest, just chemistry.
the related substances line is where the story is
Disagree on that part. 97.4% and 97.6% on the same vial is normal.
Asked KP for the batch-specific COA and they sent it within six hours, full document, batch number, date, everything. That is the baseline.
- 1Crossposting this to c/progresspics because the people who need it are not…7 comments in this branch · started by u/dario_boateng
- 2Titration speed is a side-effect dial far more than an efficacy dial.6 comments in this branch · started by u/wrong_network_w