What changed at QYB in December, and what the company will not say about it
Documentation practice is the only part of vendor quality a buyer can assess before purchase.
Certificates of analysis
Page 34 of 51 of this archive, newest first.
Spain health authority warns on falsified semaglutide pens
Reported from the analysis, not from a warning notice.
Benzyl alcohol is a preservative, not a sterilising agent
At low concentrations a measurable fraction of peptide can adsorb to glass and plastic surfaces, and the loss is largest exactly where it is least expected.
Holograms, QR codes and other things that are not verification
Reported from the analysis, not from a warning notice.
LAL, kinetic chromogenic, recombinant factor C: three ways to the same figure
The limit for a parenteral product is calculable from the dose and the body weight in two lines. Almost nobody in this trade performs the calculation.
Check the vial, not the box
A document is only as good as the chain that connects it to the material, and most chains here are two or three links longer than the paperwork admits.
Ireland health authority warns on falsified liraglutide pens
Reported from the analysis, not from a warning notice.
What happens in solution that does not happen in the cake
Every degradation pathway accelerates by orders of magnitude on reconstitution, because the solvent that lyophilisation removed is the reagent most of them need.
Singapore health authority warns on falsified liraglutide pens
Reported from the analysis, not from a warning notice.
What a split-sample exercise can establish, and what it cannot
Two years ago we ran an anonymised version of this comparison and promised a named one. This is it, with every method printed in full.
QYB declines, for the 4th time, to name its synthesis house
Documentation practice is the only part of vendor quality a buyer can assess before purchase.
What twenty companies say about storage, and what they have measured
What would make a difference is not a regulator. It is three lines on a certificate, all of which are already known to whoever wrote it.
SWB declines, for the 21st time, to name its synthesis house
Documentation practice is the only part of vendor quality a buyer can assess before purchase.
Independent analysis puts a TFC semaglutide lot at 99.0%, against 96.3% on the certificate
The result is unremarkable. What the report omits is not.
Holograms, QR codes and other things that are not verification
Reported from the analysis, not from a warning notice.
The reproducible spectrum: the single most useful thing a report can carry
What the Journal asks for when it writes to a supplier about an identity claim, and how often it gets it.
Independent analysis puts a SGN mazdutide lot at 99.2%, against 96.3% on the certificate
The report states the gradient, the wavelength and the integration threshold, which is more than most.
Medutest result on a Xi'an tirzepatide lot lands 2.1 points below the supplier’s figure
The Journal submitted the sample and paid for the analysis. The vendor was told in advance.
What changed at FGP in November, and what the company will not say about it
Documentation practice is the only part of vendor quality a buyer can assess before purchase.
Holograms, QR codes and other things that are not verification
Reported from the analysis, not from a warning notice.