[Lab] SGN BPC — VendorInvestigate came back 97.8% against a claimed 97.0%
Filing this under things worth writing down: SGN BPC — VendorInvestigate came back 97.8% against a claimed 97.0%. Figures up front so nobody has to dig: 97.8% and 97.0%. Net peptide content accounts for counterion, water and residual solvent. On some of these compounds the gap between purity and net content is…
Stocked lines and made-to-order lines have different lead times and different storage histories. Both are ordinary; the difference is worth confirming before you commit.
handling and storage vary enormously across this catalogue
a mass spectrum costs little and answers the real question
That result is an area percent from an unspecified method, which is not the same as the identity confirmation being discussed.
Asked for identity confirmation on an unusual line and got a mass spectrum with the theoretical mass alongside. That is the answer I now look for everywhere.
Storage conditions came back specific rather than generic when I asked. That told me somebody had actually done stability work.
the less-tested the compound, the more the identity test matters
Stocked lines and made-to-order lines have different lead times and different storage histories.
elin_trevino is right that a purity figure without a method is not comparable to one with a method.