What changed at WXT in November, and what the company says prompted it
Documentation practice is the only part of vendor quality a buyer can assess before purchase.
Purity
Page 35 of 51 of this archive, newest first.
Independent analysis puts a SGN exenatide lot at 96.4%, against 94.7% on the certificate
The report states the gradient, the wavelength and the integration threshold, which is more than most.
Homopeptide names the synthesis and fill sites behind its catalogue
Documentation practice is the only part of vendor quality a buyer can assess before purchase.
What Janoshik would need in order to certify sterility, and why it does not
The absence of microbiological capability in this market is a commercial fact with a straightforward explanation, and it is worth understanding before blaming anybody for it.
Holograms, QR codes and other things that are not verification
Reported from the analysis, not from a warning notice.
Independent analysis puts a QST dulaglutide lot at 95.3%, against 91.7% on the certificate
The result is unremarkable. What the report states alongside it is not.
The degradation product that elutes underneath the parent peak
An isoaspartate rearrangement changes the molecule and not the mass. A method that confirms identity by molecular weight alone will report it as the parent compound.
What a mass spectrometer does to a peptide before it measures anything
A brief and unromantic tour of the interface between a liquid sample and a vacuum.
Holograms, QR codes and other things that are not verification
Reported from the analysis, not from a warning notice.
Independent analysis puts a TFC dulaglutide lot at 95.8%, against 95.1% on the certificate
The report states the gradient, the wavelength and the integration threshold, which is more than most.
The retest date and the expiry date are not the same document
A stability programme needs a protocol, defined conditions, a stability-indicating method and time. Time is the ingredient no commercial testing service can sell.
Independent analysis puts a ERP survodutide lot at 95.6%, against 92.3% on the certificate
A reminder that a purity figure is the output of a method, and that methods differ.
Janoshik result on a Shenzhen liraglutide lot lands 1.2 points above the supplier’s stated figure
The result is unremarkable. What the report states alongside it is not.
Asparagine, glycine, and the two residues that decide a shelf life
The sequence predicts the failure mode. A methionine predicts oxidation; an asparagine followed by a glycine predicts deamidation; a cysteine predicts disulphide scrambling.
Independent analysis puts a FGP exenatide lot at 96.3%, against 92.6% on the certificate
The supplier confirmed the determination and supplied the method behind its own figure inside a week.
PeptideMeter result on a Guangzhou liraglutide lot lands 3.3 points above the supplier’s stated figure
The Journal submitted the sample and paid for the analysis. The vendor was told in advance.
Asparagine, glycine, and the two residues that decide a shelf life
The sequence predicts the failure mode. A methionine predicts oxidation; an asparagine followed by a glycine predicts deamidation; a cysteine predicts disulphide scrambling.
How a release document is put together in a regulated plant
The header identifies the batch, the table records the tests, and the footer says who is answerable. Two of the three are usually incomplete.
Portugal health authority warns on falsified semaglutide pens
Reported from the analysis, not from a warning notice.
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.