A lot number appears on every vial. Use the one shown below to pull up the original reports tied to that batch. Should your lot not appear, get in touch with us prior to using the product.
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: the four results together make up a single COA. Net peptide content 20.61 mg per 20 mg vial, identity confirmed through an HPLC retention-time match, fentanyl screen negative.
Identity: mass spectrometry
Mass spectrometry verifies that every batch matches the expected molecular weight of retatrutide (~4845 Da). Purity alone is never enough for us to release a batch.
Purity: HPLC
Reverse-phase HPLC, with a release specification of 98% or higher. The current batch's exact figure appears above and on the COA.
Endotoxin and sterility
LAL endotoxin testing is run on every batch, and results are published together with the COA. Vials that are sterile-filled also undergo bioburden testing.
Traceability
An expiration date and a lot number are printed on every vial. The lot number links to its COA, endotoxin report, and testing date. If a vial you receive carries a lot that is not listed on this site, contact us before use.
Independent laboratories
Independent analytical labs, with no commercial ties to our suppliers, carry out the testing. Each COA lists the lab names.
Interpreting a COA
The certificate states the lab, the lot, the test date, and the methods. Purity percentage comes from HPLC; mass spectrometry confirms the molecule matches retatrutide (~4845 Da); endotoxin in EU/mL is reported by the LAL assay. See the research-peptide vendors guide for the meaning of each value.
