What changed at QST in May, and what the company says prompted it
Documentation practice is the only part of vendor quality a buyer can assess before purchase.
Vendors
Page 3 of 48 of this archive, newest first.
A supplier suspends shipping to the United Kingdom after 14 consecutive customs detentions
The route did not close because of a rule about peptides.
A supplier suspends shipping to Argentina after 22 consecutive customs detentions
The route did not close because of a rule about peptides.
Six words a verification badge would need to mean anything
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 WXT in May, and what the company says prompted it
Documentation practice is the only part of vendor quality a buyer can assess before purchase.
What a 37% rise in coupling-reagent prices does to a 5 mg vial
Follow the resin, not the catalogue.
Why summer is a documented quality problem in this trade
The route did not close because of a rule about peptides.
A supplier suspends shipping to Switzerland after 4 consecutive customs detentions
The route did not close because of a rule about peptides.
A supplier suspends shipping to Turkey after 4 consecutive customs detentions
The route did not close because of a rule about peptides.
What changed at SWB in May, and what the company says prompted it
Documentation practice is the only part of vendor quality a buyer can assess before purchase.
VendorInvestigate result on a Nantong cagrilintide lot lands 4.0 points above the supplier’s stated figure
The report states the gradient, the wavelength and the integration threshold, which is more than most.
Independent analysis puts a ERP orforglipron lot at 98.6%, against 97.6% on the certificate
The result is unremarkable. What the report states alongside it is not.
Hong Kong export categories for peptide intermediates were quietly renamed
Follow the resin, not the catalogue.
Independent analysis puts a Homopeptide semaglutide lot at 98.1%, against 95.4% on the certificate
A reminder that a purity figure is the output of a method, and that methods differ.
QSC names the synthesis and fill sites behind its catalogue
Documentation practice is the only part of vendor quality a buyer can assess before purchase.
Janoshik result on a Hangzhou cagrilintide lot lands 0.9 points above the supplier’s stated figure
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.
Shanghai export categories for peptide intermediates were quietly renamed
Follow the resin, not the catalogue.
Independent analysis puts a TFC semaglutide lot at 96.7%, against 94.6% on the certificate
The supplier confirmed the determination and supplied the method behind its own figure inside a week.
PeptideMeter result on a Changsha orforglipron lot lands 1.7 points above the supplier’s stated figure
The report states the gradient, the wavelength and the integration threshold, which is more than most.