BCH names the synthesis and fill sites behind its catalogue
Documentation practice is the only part of vendor quality a buyer can assess before purchase.
Purity
Page 47 of 51 of this archive, newest first.
Independent analysis puts a SWB dulaglutide lot at 96.2%, against 95.6% on the certificate
The report states the gradient, the wavelength and the integration threshold, which is more than most.
Asparagine, glycine, and the two residues that decide a shelf life
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.
Blind duplicates: what happens when a laboratory does not know it is being watched
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.
What changed at QYB in March, and what the company says prompted it
Documentation practice is the only part of vendor quality a buyer can assess before purchase.
Custody, condition and the temperature nobody logged
The condition on arrival is recorded by some services and not others, and it is one of the more informative lines in a report.
Reproducibility, measured rather than assumed
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.
South Korea health authority warns on falsified tirzepatide pens
Reported from the analysis, not from a warning notice.
Soft ionisation: the twenty-year-old trick that made peptide identity routine
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.
Denmark health authority warns on falsified semaglutide pens
Reported from the analysis, not from a warning notice.
What changed at HJ in March, and what the company says prompted it
Documentation practice is the only part of vendor quality a buyer can assess before purchase.
Oxidation, and the peroxide that came in with the surfactant
The sequence predicts the failure mode. A methionine predicts oxidation; an asparagine followed by a glycine predicts deamidation; a cysteine predicts disulphide scrambling.
MKM names the synthesis and fill sites behind its catalogue
Documentation practice is the only part of vendor quality a buyer can assess before purchase.
Aggregation: the impurity your chromatogram dissolved before it looked
We describe each pathway in enough chemical detail to explain why it is invisible to the method the trade uses, because that is the part which has practical consequences.
VendorInvestigate result on a Zhuhai semaglutide lot lands 1.1 points above the supplier’s stated figure
The result is unremarkable. What the report states alongside it is not.
What changed at QSC in March, and what the company says prompted it
Documentation practice is the only part of vendor quality a buyer can assess before purchase.
Why a dead-clean sterile filter can pass pyrogen straight through
Bacterial endotoxin is a heat-stable lipopolysaccharide from the outer membrane of Gram-negative organisms. It survives sterilisation, passes a sterilising filter, and is…
The specification sheet says 500,000. The report says conforms.
Calibration drift is real, unremarkable, and the reason serious laboratories run internal standards.
GGPeps names the synthesis and fill sites behind its catalogue
Documentation practice is the only part of vendor quality a buyer can assess before purchase.