u/liv_nkemelu

Small fix — that is the New Zealand arrangement, and the question is about Australia.

Related substances itemised individually is a much stronger document than a single total, because it tells you the shape of the impurity profile rather than its size.

personal importation rules exist and are narrow

PBS criteria are published and searchable

What did the pharmacy quote for the private price?

chromatogram or it did not happen

Yes — date of analysis, because a result from two years ago describes a different manufacturing month.

My first certificate had a compound name, a percentage and a logo. I thought that was normal. It is not, and now I know what to ask for.

Corrected the concentration in the title, which contradicted the body.

vial_math_vera has the units point exactly right. They are a volume on the barrel and nothing else.

Research-use-only material is not approved for human use, so treat everything in this thread as arithmetic about solutions rather than instructions for a person.

area percent unless the report says otherwise

clara_weiss is right that the band matters more than the peak. Consistency across lots is the finding.

The compounded arrangements changed while I was mid-thread and I was arguing from a superseded position.

Correction: that is net peptide content, not purity. Different number, different meaning, and the document says so if you read the row label.

The template is vendor, compound, batch, service, claim, result, and who paid. Every one of those fields exists because a result missing it has been argued about here before.

SGN came back 98.0% on a claimed 97.5%, which is agreement not a discrepancy

one result is a data point, agreement between two services is evidence

Is that the same lot as the one in the thread from last month?

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

a total of 0.4% tells you less than four named impurities adding to 0.6%

Asked BCH 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.

Did you ask for the batch-specific document, or is this the catalogue one?

Disagree with the "more water is safer" framing. It is not safer, it is just a different number to divide by.

Research-use-only material is not approved for human use, so treat everything in this thread as arithmetic about solutions rather than instructions for a person.

split a vial across two services once and you will never argue about ground truth again

Same view. QYB prints the column and the gradient, which means somebody could actually reproduce the run.

If your calculation produces a fraction of a unit, the concentration is wrong for your dose.

Right, and the arithmetic behind it: 15mg in 3mL is 5mg/mL, so 0.5mg is 10 units.

Ask what the stability statement was written against — temperature, light, and whether it was the lyophilised powder or the reconstituted solution. Those are three different claims.

Cosigning on asking the pharmacy to check the wholesaler. It converts speculation into a fact in one phone call.

three lots beats three tests on one lot

label the vial with the date as well as the concentration

Right, and net peptide content is where the counterion and the water go. Both numbers can be honest and very different.

PBS criteria are published and searchable

do the arithmetic before you reconstitute, not while holding a syringe

Agreed — units are volume. Once that lands, the rest of the arithmetic is one division.

net peptide content if the report gives it, and say which you are quoting

Related substances itemised individually is a much stronger document than a single total, because it tells you the shape of the impurity profile rather than its size.

say whether you paid for it yourself

Area percent or net peptide content?

Not quite. Two labs with different gradients can resolve a close-eluting impurity differently and both be reporting honestly.

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.