the three way match is vial, certificate, invoice. if all three agree you have something
#coa-reading 2025-05-10
Saturday22 messages6 participantstimes are UTC
Highlights from this day
- VialBot — Reminder for panel_before_after: dose day is today. Set 4 days ago. 19:38
- tenpence — a vial can be 99.4% pure and hold 8.1mg of a 10mg label. both numbers are true and only one of them is the one you care about update from 5 months ago: started asking… 20:13
- stopped_and_regained — is water content normally on a certificate or do you have to ask 20:55
- endotoxin_ed — a lab that reports "greater than 98%" rather than a number is telling you they did not integrate carefully 21:27
- endotoxin_ed — i was wrong about this for a year: area percent under-reports nothing, it just answers a different question than assay does, ill dig out the number 21:30
Reminder for panel_before_after: dose day is today. Set 4 days ago.
no lot number on this certificate, does that make it worthless
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nobody can authenticate a certificate from a scan. you authenticate the material by testing it yourself
the font on this one changes halfway down, am i being paranoid
two certificates from the same supplier have an identical chromatogram, is that normal
weigh the vial
the paperwork can be perfect and the vial can still be light. weigh it
purity is not assay
follow up gross mass on a jewellery scale plus the water content is enough to catch most underfills
a vial can be 99.4% pure and hold 8.1mg of a 10mg label. both numbers are true and only one of them is the one you care about
update from 5 months ago: started asking every supplier for water content and about half now include it
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not detected means nothing
single wavelength detection can miss a co-eluting impurity that does not absorb there
*Janoshik not the other one
is water content normally on a certificate or do you have to ask
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does anyone actually check the residual solvents section
update from 25 months ago: started asking every supplier for water content and about half now include it
looks re-dated
is there a standard layout or does every lab do their own
a lab that reports "greater than 98%" rather than a number is telling you they did not integrate carefully
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sorry to jump in one decimal versus two is usually just house style, not precision
i was wrong about this for a year: area percent under-reports nothing, it just answers a different question than assay does, ill dig out the number