Handling protocols, COA literacy and a sceptical look at the UK research-peptide market — written by our synthesis team for working lab researchers.
What every line on a COA means — HPLC purity, mass-spec identity, endotoxin, residual TFA — and the three numbers that matter most.
The chemistry of the lyo cake: oxidative damage, residual moisture and why your reconstituted solution looks cloudy when it shouldn't.
A practical guide to storing lyophilised vials at 2–8 °C, when to freeze, and how long a reconstituted bacteriostatic solution really lasts.
What a reverse-phase HPLC chromatogram is actually showing you, and how to spot a clean peak from a tail.
What the Human Medicines Regulations and the Misuse of Drugs Act do (and don't) say about research peptides shipped within the UK.
Missing CAS numbers, generic stock photography, vague purity claims — the patterns that almost always indicate a re-bottler, not a synthesiser.