[Discussion] the related substances advice in here is 2 years out of date
the related substances advice in here is 2 years out of date — a position I have arrived at slowly and would like tested. To save the first four comments: 2 years. Net peptide content is the fraction of the powder that is actually peptide once counterion, water and residual solvent are accounted for. A 99% pure…
The PDF creation date being later than the analysis date is usually a re-issue or a re-export. It is worth one question and it is not evidence of anything on its own.
Disagree that a lower number is automatically worse. A conservative claim that survives testing is worth more than an optimistic one that does not.
a total of 0.4% tells you less than four named impurities adding to 0.6%
This. Area percent answers "what fraction of what the detector saw was the peak I wanted", and people read it as "how much peptide is in the vial".
ask for the storage condition the stability statement was written against
a certificate with no method line is decorative