how do you verify a certificate is actually from the lab it says
#coa-reading 2026-01-14
Wednesday14 messages3 participantstimes are UTC
Highlights from this day
- lena_lots — is endotoxin ever tested on research material 17:17
- oli_orals — sterility and endotoxin are separate tests and almost nobody runs either on research material 17:18
- lena_lots — update from 26 months ago: started asking every supplier for water content and about half now include it 17:50
- oli_orals — is a supplier certificate worth anything on its own 20:44
is endotoxin ever tested on research material
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sterility and endotoxin are separate tests and almost nobody runs either on research material
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update from 26 months ago: started asking every supplier for water content and about half now include it
| Line | Claims | Does not claim |
|---|---|---|
| Purity (area %) | fraction of detected material that is the target | how many mg are in the vial |
| Assay / content | mg of target per vial | that it is sterile |
| Water content | mass fraction that is water | anything about purity |
| Counterion | salt form and its mass share | net peptide unless stated |
| Related substances | what else was seen | what was not looked for |
should a certificate say which instrument and method they used
does anyone keep a folder of certificates to compare over time
good certificate actually
no lot no certificate
not detected means nothing
test it yourself
the font on this one changes halfway down, am i being paranoid
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does purity by hplc at one wavelength miss things
mixed fonts and inconsistent kerning in one document is worth a second look
is a supplier certificate worth anything on its own
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