Holograms, QR codes and other things that are not verification
Reported from the analysis, not from a warning notice.
Purity
Page 14 of 51 of this archive, newest first.
How a single percentage came to stand for quality
This piece takes the measurement apart into the decisions it is made of, because each decision moves the answer.
Specification and result are two columns, and only one of them is a measurement
The arithmetic of significant figures, applied to a document that routinely reports four of them.
Mexico health authority warns on falsified semaglutide pens
Reported from the analysis, not from a warning notice.
Holograms, QR codes and other things that are not verification
Reported from the analysis, not from a warning notice.
Independent analysis puts a FGP survodutide lot at 95.6%, against 92.9% on the certificate
The report states the gradient, the wavelength and the integration threshold, which is more than most.
What changed at HJ in November, and what the company will not say about it
Documentation practice is the only part of vendor quality a buyer can assess before purchase.
PeptideMeter result on a Tianjin retatrutide 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.
Why VendorInvestigate may run electrospray where another laboratory runs MALDI
The two ionisation techniques in general use produce different charge distributions, different adducts and different failure modes. Certificates almost never say which was…
Adsorption, and the dose that stayed on the glass
An in-use period is established by a dedicated study on a specific formulation in a specific container at a specific concentration. Borrowing one from a marketed product is…
Asparagine, glycine, and the two residues that decide a shelf life
We describe each pathway in enough chemical detail to explain why it is invisible to the method the trade uses, because that is the part which has practical consequences.
Sterility is not a percentage, which is the whole difficulty
Every certificate circulating in this market answers a question about molecules. Almost none answers a question about organisms, pyrogens, or the integrity of the seal.
The four testing services and the study none of them can run
We asked twenty companies three questions about stability data and print every answer, refusal and non-response.
GGPeps 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.
Janoshik result on a Chengdu orforglipron lot lands 3.8 points below the supplier’s figure
The supplier has not disputed the finding. It has not explained the gap either.
What we asked twenty suppliers about stability data
Storage instructions in this market are close to uniform and almost never accompanied by the study that would justify them. Uniformity is a sign of convention, not of…
How to check a certificate in ten minutes
What each missing test would cost to add, and which of them a buyer should actually want.
Sweden health authority warns on falsified liraglutide pens
Reported from the analysis, not from a warning notice.
Medutest result on a Zhuhai orforglipron lot lands 3.8 points below the supplier’s figure
The supplier has not disputed the finding. It has not explained the gap either.
What changed at SGN in October, and what the company will not say about it
Documentation practice is the only part of vendor quality a buyer can assess before purchase.