Retatrutide-Peptide.biz
Certificate of Analysis 99.69% purity (HPLC) View report → Endotoxin (USP 85) Not detected View report → Sterility (USP 71) No growth detected View report → Heavy metals (USP 233) Pass View report → One report file: all four results form parts of a single COA. Net peptide content 20.61 mg per 20 mg vial, identity confirmed by HPLC retention-time match, fentanyl screen negative.
Identity: mass spectrometry
Each batch is confirmed by MS to match the expected molecular weight of retatrutide (~4845 Da). We never release a batch on purity alone.
Purity: HPLC
Reverse-phase HPLC with a release specification of 98% or higher. The exact figure for the current batch appears above and on the COA.
Endotoxin and sterility
LAL endotoxin testing on every batch, with results published alongside the COA. Sterile-filled vials also undergo bioburden testing.
Traceability
Every vial bears a lot number and an expiration date. The lot number links to its COA, endotoxin report, and testing date. If a vial you receive has a lot that is not listed on this site, contact us before use.
Independent laboratories
Testing is carried out by independent analytical labs with no commercial ties to our suppliers. Lab names appear on each COA.
Interpreting a COA
The certificate states the lab, the lot, the test date, and the methods. HPLC gives the purity percentage; mass spectrometry confirms the molecule matches retatrutide (~4845 Da); the LAL assay reports endotoxin in EU/mL. See the research-peptide vendors guide for what each value means.