Cascade Research Group Semaglutide: content discrepancy in PI-LAB-2026-110

Cascade Research Group's Semaglutide came back with a discrepancy, specimen PI-LAB-2026-110 if you want to look at it yourself.

Purity was actually fine at 96.1%. The problem is the amount, 9.86mg measured against 10mg on the label. Which is the kind of thing a purity-only COA sails straight past.

Has anyone else bought from this lot? Trying to work out if it's just this batch or something broader.

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rhea 2y ago

saving this. gonna reread when im not half asleep

IsotopeNerd 1y ago

Reversed-phase HPLC with UV detection at 214nm is the standard here because the peptide bond absorbs there. If a vendor reports purity without stating the method or wavelength, the number is not comparable to anything.

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