Oxidation, and the peroxide that came in with the surfactant
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.
The Supply Chain
Page 7 of 67 of this archive, newest first.
Page 7
Holograms, QR codes and other things that are not verification
Reported from the analysis, not from a warning notice.
What changed at GL Biochem in March, and what the company will not say about it
Documentation practice is the only part of vendor quality a buyer can assess before purchase.
Twenty-eight days is a number from somebody else’s product
We set out what is known, what is inferred and what is simply assumed about the fortnight after a vial is opened.
What a 33% rise in coupling-reagent prices does to a 15 mg vial
Follow the resin, not the catalogue.
Shenzhen export categories for peptide intermediates were quietly renamed
Follow the resin, not the catalogue.
What a 31% rise in coupling-reagent prices does to a 2 mg vial
Follow the resin, not the catalogue.
Holograms, QR codes and other things that are not verification
Reported from the analysis, not from a warning notice.
Japan health authority warns on falsified tirzepatide pens
Reported from the analysis, not from a warning notice.
Holograms, QR codes and other things that are not verification
Reported from the analysis, not from a warning notice.
What a 17% rise in coupling-reagent prices does to a 10 mg vial
Follow the resin, not the catalogue.
A supplier suspends shipping to Saudi Arabia after 15 consecutive customs detentions
The route did not close because of a rule about peptides.
Low endotoxin recovery: the interference nobody looks for
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.
Spain health authority warns on falsified exenatide pens
Reported from the analysis, not from a warning notice.
What a 32% rise in coupling-reagent prices does to a 10 mg vial
Follow the resin, not the catalogue.
Holograms, QR codes and other things that are not verification
Reported from the analysis, not from a warning notice.
Why summer is a documented quality problem in this trade
The route did not close because of a rule about peptides.
Holograms, QR codes and other things that are not verification
Reported from the analysis, not from a warning notice.
What a 15% rise in coupling-reagent prices does to a 30 mg vial
Follow the resin, not the catalogue.
An interlaboratory comparison nobody had run
Duplicate submissions under different names test within-laboratory repeatability, which is a different quantity from between-laboratory reproducibility.