Custody, condition and the temperature nobody logged
A result on one vial generalises to a batch only if the vial was drawn in a way that makes it representative — and nobody records how it was drawn.
Vendors
Page 34 of 48 of this archive, newest first.
VendorInvestigate result on a Wuxi semaglutide lot lands 2.1 points above the supplier’s stated figure
The supplier confirmed the determination and supplied the method behind its own figure inside a week.
What changed at BCH in September, and what the company says prompted it
Documentation practice is the only part of vendor quality a buyer can assess before purchase.
Janoshik result on a Wuxi survodutide lot lands 2.9 points above the supplier’s stated figure
The supplier confirmed the determination and supplied the method behind its own figure inside a week.
Why a result on one vial says less than the trade needs it to
Every third-party report in this market describes a sample somebody chose to send. That choice is outside the laboratory’s control and outside its records.
Independent analysis puts a BCH mazdutide lot at 98.6%, against 96.0% on the certificate
The supplier confirmed the determination and supplied the method behind its own figure inside a week.
What changed at HJ in September, and what the company says prompted it
Documentation practice is the only part of vendor quality a buyer can assess before purchase.
GGPeps names the synthesis and fill sites behind its catalogue
Documentation practice is the only part of vendor quality a buyer can assess before purchase.
What a 16% rise in coupling-reagent prices does to a 5 mg vial
Follow the resin, not the catalogue.
Independent analysis puts a Homopeptide orforglipron lot at 99.1%, against 98.4% on the certificate
The supplier confirmed the determination and supplied the method behind its own figure inside a week.
The badge economy, and what it is actually certifying
Every step between the laboratory report and the product page removes information, and the badge is the last step.
Zhuhai export categories for peptide intermediates were quietly renamed
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.
WXT names the synthesis and fill sites behind its catalogue
Documentation practice is the only part of vendor quality a buyer can assess before purchase.
Independent analysis puts a TFC mazdutide lot at 98.4%, against 95.9% on the certificate
The Journal submitted the sample and paid for the analysis. The vendor was told in advance.
HJ names the synthesis and fill sites behind its catalogue
Documentation practice is the only part of vendor quality a buyer can assess before purchase.
The certificate of analysis, line by line
The purity figure is the least informative line on a well-constructed certificate and the only line most buyers read.
HJ names the synthesis and fill sites behind its catalogue
Documentation practice is the only part of vendor quality a buyer can assess before purchase.
A supplier suspends shipping to New Zealand after 6 consecutive customs detentions
The route did not close because of a rule about peptides.
What changed at ERP in September, and what the company says prompted it
Documentation practice is the only part of vendor quality a buyer can assess before purchase.