Why summer is a documented quality problem in this trade
The route did not close because of a rule about peptides.
Stability
Page 6 of 20 of this archive, newest first.
Reading a certificate as a document rather than as a score
Nothing on this page is difficult. It is simply unfamiliar, and unfamiliarity is what makes a weak certificate look like a strong one.
A supplier suspends shipping to Canada after 10 consecutive customs detentions
The route did not close because of a rule about peptides.
A supplier suspends shipping to Germany after 5 consecutive customs detentions
The route did not close because of a rule about peptides.
What a purity certificate is silent about
A purity figure is silent on peptide content, on water, on counter-ion, on sterility, on endotoxin and on stability. Each of those silences has a price attached.
Retest date, expiry date, and the two conventions being confused
A document is only as good as the chain that connects it to the material, and most chains here are two or three links longer than the paperwork admits.
The header, the table and the signature block
The header identifies the batch, the table records the tests, and the footer says who is answerable. Two of the three are usually incomplete.
A supplier suspends shipping to Turkey after 6 consecutive customs detentions
The route did not close because of a rule about peptides.
Retest date, expiry date, and the two conventions being confused
A document is only as good as the chain that connects it to the material, and most chains here are two or three links longer than the paperwork admits.
A supplier suspends shipping to Singapore after 11 consecutive customs detentions
The route did not close because of a rule about peptides.
Why a dry powder is a chemical reactor with the volume turned down
Residual moisture is measured routinely in regulated manufacture, is reported almost nowhere in this trade, and predicts long-term stability better than any other single…
The intramuscular injection nobody intended
Skin thickness at the standard injection sites is approximately two millimetres in adults and varies remarkably little with body mass. That single finding is why short…
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 Singapore after 19 consecutive customs detentions
The route did not close because of a rule about peptides.
Who signed this, and what did they undertake by signing it
Accreditation is granted for a defined scope of methods. A laboratory can be properly accredited and the test on your certificate can sit outside it.
In-use periods, and the ones nobody can give you
Sharps disposal is a legal obligation in most jurisdictions and a safety obligation everywhere. Household waste is not a route.
A supplier suspends shipping to Brazil after 7 consecutive customs detentions
The route did not close because of a rule about peptides.
Aggregation: the impurity your chromatogram dissolved before it looked
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.
A supplier suspends shipping to Argentina after 11 consecutive customs detentions
The route did not close because of a rule about peptides.
Why summer is a documented quality problem in this trade
The route did not close because of a rule about peptides.