All our lyophilised research peptides have a minimum purity of >99%, verified by independent third-party laboratory analysis at Janoshik.

Each batch is also tested for molecular identity using mass spectrometry (ESI-MS or MALDI-TOF). A Certificate of Analysis (CoA) is available for every product.

Yes. An up-to-date CoA with the Janoshik test results is available directly on each product page.

It contains the batch number, purity, molecular weight and analytical methods used.

If you need further documents, our team will be happy to help.

Our peptides are supplied as lyophilised (freeze-dried) powder. For optimum stability, storage at −20 °C in a dry place protected from light is recommended. Shelf-life information is based on general experience and may vary by peptide; it does not constitute a binding guarantee.

After reconstitution, divide the solution into suitable aliquots to avoid repeated freeze–thaw cycles. Reconstituted peptides should be stored at −20 °C or −80 °C and used as soon as possible.

Stability in solution is lower than in the lyophilised state and depends on factors such as the solvent, pH, storage duration and handling.

Yes, we ship worldwide. Please note that import regulations for research compounds vary by country.

It is the buyer’s responsibility to ensure compliance with local laws and customs regulations before ordering.