my vial assayed under label but the purity was fine, which matters more
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 / 10mgnice result
unrelated but i test roughly every tenth vial. it is a sampling strategy, not paranoia
underfill is more common than impurity. if you only test purity you are testing the less likely failure, i could be wrong
weigh the vial before you reconstitute. it costs nothing and catches the common failure
is anyone tracking results over time in a way they would share
a result without a lot number and a purchase date is an anecdote with a pdf attached
post the lot, the purchase month, the lab, the number, and what you were expecting. that makes it useful later
anyone had a result they think was a lab error rather than a bad vial
i had a result i am fairly sure was a handling error on my side and i logged it as such
if the vial has been through a bad transit you are testing the transit as much as the supplier
one bad test does not condemn a supplier. one good test does not clear one. both halves get ignored equally
my read after three years of this: purity is mostly fine across the market and fill consistency is where suppliers differ, we shall see
a point or two between the certificate and an independent result is inside what two labs disagree by
what interests me is when the gap goes the same direction every time. once is noise, three times is a pattern