Independent analysis puts a TFC tirzepatide lot at 98.3%, against 95.4% on the certificate
The result is unremarkable. What the report states alongside it is not.
Coverage naming TFC
Reporting from across the Journal that names Tianjin Finder Chemical Co., Ltd., together with the correspondence this desk has had with the company about it. The dossier itself — the testing record, the correspondence log, the ordering box and the reader reports — is here. The company sells directly at tfcpeptides.com, a labelled and nofollowed link the Journal is paid nothing for; read the record before you use it.
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.
What changed at TFC in April, and what the company says prompted it
Documentation practice is the only part of vendor quality a buyer can assess before purchase.
What changed at TFC in April, and what the company says prompted it
Documentation practice is the only part of vendor quality a buyer can assess before purchase.
What changed at TFC in March, and what the company says prompted it
Documentation practice is the only part of vendor quality a buyer can assess before purchase.
What changed at TFC in February, and what the company says prompted it
Documentation practice is the only part of vendor quality a buyer can assess before purchase.
TFC names the synthesis and fill sites behind its catalogue
Documentation practice is the only part of vendor quality a buyer can assess before purchase.
Why TFC can be entirely straightforward and still tell you nothing about bioburden
The Journal has read several hundred certificates from twenty companies. We set out what the documents actually cover, and what a reader is filling in from imagination.
What changed at TFC in December, and what the company says prompted it
Documentation practice is the only part of vendor quality a buyer can assess before purchase.
TFC names the synthesis and fill sites behind its catalogue
Documentation practice is the only part of vendor quality a buyer can assess before purchase.
TFC 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 cagrilintide lot at 95.9%, against 95.2% on the certificate
A reminder that a purity figure is the output of a method, and that methods differ.
Independent analysis puts a TFC semaglutide lot at 97.6%, against 95.9% on the certificate
The Journal submitted the sample and paid for the analysis. The vendor was told in advance.
What changed at TFC in April, and what the company says prompted it
Documentation practice is the only part of vendor quality a buyer can assess before purchase.
TFC names the synthesis and fill sites behind its catalogue
Documentation practice is the only part of vendor quality a buyer can assess before purchase.
TFC names the synthesis and fill sites behind its catalogue
Documentation practice is the only part of vendor quality a buyer can assess before purchase.
Why TFC can be entirely straightforward and still tell you nothing about bioburden
The Journal has read several hundred certificates from twenty companies. We set out what the documents actually cover, and what a reader is filling in from imagination.
Independent analysis puts a TFC semaglutide lot at 99.0%, against 96.3% on the certificate
The result is unremarkable. What the report states alongside it is not.
TFC 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 dulaglutide lot at 95.8%, against 95.1% on the certificate
The report states the gradient, the wavelength and the integration threshold, which is more than most.