What retatrutide is
Retatrutide is a synthetic peptide studied in laboratory settings as part of the incretin analogue family. It is a single-chain, chemically synthesised sequence produced by solid-phase peptide synthesis and purified by reverse-phase HPLC before being lyophilised.
As a research material it is supplied as a white to off-white lyophilised powder in a sealed glass vial. It is characterised by mass spectrometry for identity and by HPLC for purity, with both figures reported on the certificate of analysis that accompanies the lot.
This page is reference information for laboratory personnel handling research materials. It contains no medical, dosing, or human-use guidance of any kind.
How it is supplied
- Lyophilised powder in a sealed, stoppered glass vial
- Available in 10 mg, 20 mg, and 30 mg strengths
- Each vial labelled with product name, strength, lot number, and batch number
- Purity and identity reported per lot on the certificate of analysis
- Shipped in protective packaging prepared for laboratory handling
What to verify on arrival
Confirm that the strength and batch number printed on the vial label match the batch number on the certificate of analysis. A mismatch means the documentation does not describe the material in front of you, and the lot should be set aside rather than logged into inventory.
Inspect the lyophilised cake. A compact or lightly fluffed white cake is normal. Discolouration, a collapsed or oily residue, or a vial with a compromised stopper seal are all reasons to quarantine the vial.
Storage
- Sealed lyophilised vials: store cold and protected from light
- Avoid repeated temperature cycling — keep vials in a stable location rather than a frequently opened door shelf
- Keep vials in their original labelled packaging so lot traceability is never lost
- Record the date a vial enters and leaves storage in your inventory log
Purity and documentation
Purity for research-grade retatrutide is typically reported at 99% or above by HPLC. The figure alone is not the whole picture — the chromatogram, the test date, and the batch identifier together are what make a purity claim verifiable.
Every Obsidian Peptides lot carries a batch number printed on the label, and certificates of analysis are published on the COA page so the documentation can be checked before an order is placed rather than after it arrives.
