Every compound that ships from OPSEK Labs is documented, verified, and traceable. This page outlines what that means in practice — the testing, the sourcing, and the records you receive with every order.
We do not rely on supplier‑provided documentation alone. Each lot is independently re‑verified at an ISO‑accredited analytical laboratory before it is released for sale.
Used to determine purity. The chromatogram identifies the main compound peak and any related impurities, giving a percentage purity value. Our acceptance threshold is 99.0% or higher; lots that fall short are rejected, not relabeled.
Confirms the molecular identity of the compound by measuring its mass‑to‑charge ratio. This guarantees that the peptide or small molecule in the vial is the one named on the label — not a related analog or fragment.
Compounds intended for research formulations are screened for bacterial endotoxins (LAL) and microbial bioburden to research‑grade limits.
In research, an unlabeled or undocumented vial is not a useful research tool — it's a question mark. Reproducible results require knowing:
Every OPSEK shipment includes the COA for the specific lot you receive. We retain these records and can re‑issue them on request, even years later, by emailing support@opseklabs.com with your order or lot number.
OPSEK Labs partners with a small number of vetted manufacturing facilities. Selection criteria include:
We do not list a compound until at least one full lot has cleared independent testing at our analytical partner.
Every vial carries a lot number printed on the label. That lot number maps to:
Lyophilized peptides are stable at room temperature for short transit periods, but we err on the side of caution:
For specifics on storing your compounds after they arrive, see the Storage & Handling Guide.
Not sure how to interpret the document that ships with your order? Our COA Reading Guide walks through every section — purity, identity, residual solvents, and what each acceptance criterion means for your research.
All compounds sold by OPSEK Labs are intended strictly for in vitro laboratory research purposes. They are not intended for human consumption, veterinary use, clinical use, or any use outside of controlled research settings. These products have not been evaluated by the Food and Drug Administration. It is the responsibility of the purchaser to comply with all applicable laws and regulations.
For technical, COA, or sourcing questions:
Email: support@opseklabs.com
Reference your lot number when possible for the fastest response.