Who signed this, and what did they undertake by signing it
A manufacturer’s certificate is a self-declaration. An accredited laboratory’s report is a third-party measurement. The trade prints both under one heading.
Testing Dispatch
Janoshik result on a Suzhou semaglutide lot lands 0.7 points below the supplier’s figure
The result is unremarkable. What the report omits is not.
Janoshik has released a batch of 12 analytical reports on research-grade semaglutide lots, including material from SGN and WWB. Reported purities range across roughly 0.7 percentage points, and the report set is unusual in stating the analytical method for every determination rather than for some of them.
Content by elemental nitrogen determination returned 93% of the labelled nominal mass, which on a 2 mg vial corresponds to roughly 4.05 mg of peptide rather than the labelled figure. The remainder is accounted for by counter-ion, residual water and residual solvent, none of which is visible chromatographically.
Content by elemental nitrogen determination returned 93% of the labelled nominal mass, which on a 2 mg vial corresponds to roughly 4.05 mg of peptide rather than the labelled figure. The remainder is accounted for by counter-ion, residual water and residual solvent, none of which is visible chromatographically.
Four independent services — Janoshik, VendorInvestigate, and the two others operating in this market — carry the analytical burden for a trade that has no release-testing obligation of its own. Each is paid by whoever submits the sample, which is usually the vendor. The Journal’s position is that a submitter-pays model is workable but that its incentive structure has to be stated whenever a result is quoted as verification.
"Content is the number that matters if you are doing arithmetic with a vial, and content is the number nobody sells," said Rowena Ashcombe, community pharmacist and diabetes educator. "Purity is what you can afford. Content is what you need."
SGN’s dossier has been updated with this determination and with the date of the request for comment. The dossier’s "what we could not verify" box records the questions still outstanding.
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