Research & quality
Documentation, handling and testing
Practical research notes plus the independent eight-step protocol that backs every batch we release.
Research library
Practical guides for lab work
Short, practical notes written for people who actually work with these compounds in a laboratory setting.
Quality protocol
Every batch, 8× tested.
Independent laboratories, not in-house rubber stamps. If a lot fails any single assay it does not ship.
Purity — HPLC-UV
Reverse-phase HPLC with UV detection quantifies the main peak against a certified reference standard. Release threshold: ≥ 98%.
Content verification
Net peptide content is measured so labeled mass reflects actual peptide, not counter-ions or residual solvent.
Identity — mass spectrometry
ESI-MS confirms observed molecular weight against the theoretical weight of the sequence.
Heavy metals — ICP-MS
Lead, arsenic, cadmium and mercury screened against USP <232> elemental impurity limits.
Sterility — USP <71>
Membrane filtration sterility testing on the filled, sealed vial.
Endotoxin — LAL
Kinetic chromogenic LAL assay. Release threshold: < 0.5 EU/mg.
Batch conformity
An independent reviewer confirms the released lot matches its specification sheet in full before it ships.
Fentanyl screen — LC-MS/MS
Targeted screen confirming absence of fentanyl and known fentanyl analogs.
Smart research.
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Research updates from Dollar Peptide Club
Catalog updates, new research compounds, and quality documentation news.
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