The named comparison we promised two years ago
Two years ago we ran an anonymised version of this comparison and promised a named one. This is it, with every method printed in full.
Vendors
The companies whose names appear on the label, reported as businesses.
What changed at SWB in June, and what the company will not say about it
Documentation practice is the only part of vendor quality a buyer can assess before purchase.
What changed at SSA in June, and what the company will not say about it
Documentation practice is the only part of vendor quality a buyer can assess before purchase.
SGN declines, for the 21st time, to name its synthesis house
Documentation practice is the only part of vendor quality a buyer can assess before purchase.
Independent analysis puts a TFC tirzepatide lot at 98.3%, against 95.4% on the certificate
The result is unremarkable. What the report omits is not.
Why summer is a documented quality problem in this trade
The route did not close because of a rule about peptides.
What a 28% rise in coupling-reagent prices does to a 10 mg vial
Follow the resin, not the catalogue.
Janoshik result on a Qingdao semaglutide lot lands 3.7 points below the supplier’s figure
A reminder that a purity figure is the output of a method, and that methods differ.
Twelve things a real certificate has, and what their absence means
Nothing on this page is difficult. It is simply unfamiliar, and unfamiliarity is what makes a weak certificate look like a strong one.
BCH declines, for the 17th time, to name its synthesis house
Documentation practice is the only part of vendor quality a buyer can assess before purchase.
A supplier suspends shipping to Spain after 13 consecutive customs detentions
The route did not close because of a rule about peptides.
Wuhan export categories for peptide intermediates were quietly renamed
Follow the resin, not the catalogue.
The badge is about a sample. The listing is about a product.
A badge asserts that something was tested. It does not assert what, when, on whose sample, by what method, or whether the lot on sale is the lot that was tested.
What changed at FGP in June, and what the company will not say about it
Documentation practice is the only part of vendor quality a buyer can assess before purchase.
What a split-sample exercise can establish, and what it cannot
Duplicate submissions under different names test within-laboratory repeatability, which is a different quantity from between-laboratory reproducibility.
Nantong export categories for peptide intermediates were quietly renamed
Follow the resin, not the catalogue.
What changed at SWB in June, and what the company will not say about it
Documentation practice is the only part of vendor quality a buyer can assess before purchase.
The badge is about a sample. The listing is about a product.
The Journal does not treat a badge as evidence and states so wherever it reports one.
Independent analysis puts a QYB semaglutide lot at 98.3%, against 96.3% on the certificate
The Journal submitted the sample and paid for the analysis. The vendor was told in advance.
Why summer is a documented quality problem in this trade
The route did not close because of a rule about peptides.