u/anecdata_annie

Pushing back a little: a missing field is usually presentation, not concealment. Ask for the full document before drawing conclusions.

Cosigning. The batch identifier is load-bearing, and a certificate that cannot be tied to the vial in your hand is not about your vial.

the price you pay depends on the listing status of your indication

Pharmacy-level availability and national supply are different questions: a pharmacy can be out while the wholesaler is not, and the pharmacist can check in minutes.

Asked WXT for the batch-specific certificate and had the full document — batch, date, method line naming the column — inside six hours. That is now my baseline for everybody.

the shortage listing has an expected resolution date on it

chromatogram or it did not happen

I would not read a rounded figure as evasive. Plenty of documents round to one decimal as house style.

What does the method line actually say?

Disagree on this specific point. Two honest labs can resolve that impurity differently and report different numbers.

Why the same vial can honestly produce three different numbers.

Purity by area percent is relative to what the detector saw on one gradient at one wavelength. Net peptide content subtracts counterion, water and residual solvent. Mass of peptide per vial is net content times fill weight, and fill weight has its own tolerance.

So a document reading 99% purity, 6% acetate and 4% water is describing a vial that is about 90% peptide by mass, and every one of those numbers is honest. The mistake is treating the headline figure as the answer to "how much peptide did I get".

Yes — and the reason to ask for the whole page is that the interesting parts are the ones people crop out to fit a screenshot.

axis labels included, always

Are the related substances itemised or is it a single total?

net peptide content and purity are two different numbers on the same vial