Frequently asked questions
What does 'Research Use Only' mean?+
Research Use Only (RUO) is a regulatory classification. It means the material is supplied strictly for in-vitro laboratory or preclinical research. It is not approved for human consumption, therapeutic use, or veterinary administration.
How is purity verified?+
Every batch is analyzed by an independent third-party laboratory. Standard release testing includes reverse-phase HPLC at 220 nm (purity target ≥99%), electrospray mass spectrometry for identity, and endotoxin screening.
Do you provide a Certificate of Analysis (COA)?+
Yes. Every batch ships with a batch number that resolves to a downloadable COA on this site. Use the COA lookup on our Testing page.
How should lyophilized peptides be stored?+
Store lyophilized powder at -20°C, sealed and protected from light. Under those conditions most sequences retain their stated purity for 24 months or longer.
What is your shipping model?+
US domestic fulfillment with insulated packaging. Cold-chain (ice pack) shipping is available for temperature-sensitive sequences.
Do I need an account to buy?+
No. Checkout is guest-first. Accounts are optional and offered after purchase for one-click reordering.