Dalton is a small peptide laboratory in Phoenix. We synthesize forty-odd compounds in-house, fingerprint every lot by HPLC and mass spec, and ship them on dry ice next day.
Every compound listed is built on our own solid-phase synthesizers and purified by preparative HPLC. No brokered material, no white-label repackaging.
Each lot is fingerprinted by ESI-MS before it leaves the bench. Observed mass, calculated mass, purity figure, and lot ID are recorded on the certificate of analysis.
Overnight from Phoenix on dry ice for liquids, gel packs for lyophilized vials. Chain of custody documented from freezer to courier to door.
Fmoc chemistry on rink-amide or Wang resin. Coupling cycles tracked in real time; failed cycles trigger a re-coupling rather than a batch carry-forward.
Reverse-phase C18 against a water/acetonitrile gradient with 0.1% TFA. Fractions pooled by analytical HPLC before lyophilization.
Positive-mode ESI-MS. Observed and calculated monoisotopic masses recorded; deviation greater than 0.5 Da fails the lot.
Endotoxin clearance via recombinant Factor C, COA signed, vial stored at −20 °C until dispatch. Cold-chain log starts at the freezer door.