thats a tell
#coa-reading 2026-06-25
Thursday15 messages3 participantstimes are UTC
Highlights from this day
- spreadsheet_stu — gross mass on a jewellery scale plus the water content is enough to catch most underfills, ask me again in a month 14:02
- net_peptide — residual solvents matter more than people think for anything that went through a lot of purification steps 15:19
- spreadsheet_stu — the three way match is vial, certificate, invoice. if all three agree you have something, from memory 16:06
- net_peptide — whats the related substances table actually telling me 16:07
- monoisotopic — purity is what fraction of the contents is the target. assay is how many mg are actually there. different questions 16:10
if you only read one line on a certificate, read the lot number. if you read two, read the assay
test it yourself
is sterility tested as part of a normal purity certificate
same chromatogram
gross mass on a jewellery scale plus the water content is enough to catch most underfills, ask me again in a month
no lot no certificate
residual solvents matter more than people think for anything that went through a lot of purification steps
weigh the vial
the three way match is vial, certificate, invoice. if all three agree you have something, from memory
whats the related substances table actually telling me
❤️10
purity is what fraction of the contents is the target. assay is how many mg are actually there. different questions
lot bought purity assay/label
A-2418 2025-03 99.1% 9.6 / 10mg
A-2601 2025-08 98.7% 9.8 / 10mg
B-0114 2026-01 99.3% 9.4 / 10mg
B-0329 2026-04 98.9% 9.9 / 10mgis water content normally on a certificate or do you have to ask
why would a vial be 99.4 pure and still assay under label
the font on this one changes halfway down, am i being paranoid