> For the complete documentation index, see [llms.txt](https://docs.rplpeptides.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.rplpeptides.com/docs/faq/storage-faq.md). # Storage FAQ ## 1. How should I store lyophilized peptides? Store lyophilized peptides at -20°C in a freezer with consistent temperature. Protect from light (amber vials or wrapped in aluminum foil). Keep in a desiccated environment — avoid opening vials in high-humidity conditions. ## 2. What happens if I store at 2–8°C instead of -20°C? Short-term storage (up to 12 months) at 2–8°C is acceptable for most peptides. However, long-term storage at -20°C is strongly recommended as molecular mobility is significantly reduced at lower temperatures, minimizing degradation. ## 3. Is it safe to store peptides at room temperature? Room temperature storage (25°C) is not recommended for extended periods. Some degradation may occur within days to weeks depending on the specific peptide sequence. Only short-term handling (during weighing and reconstitution) at room temperature is acceptable. ## 4. How should I handle the vial before opening? Equilibrate the unopened vial to room temperature for 15–30 minutes before opening to prevent moisture condensation on the lyophilized cake. Condensation introduces water, which can accelerate degradation. ## 5. How should reconstituted peptides be stored? Aliquot into single-use portions immediately after reconstitution. Store at -20°C for long-term use or 2–8°C for short-term use. Avoid repeated freeze-thaw cycles (maximum 3 cycles). Use low-binding microcentrifuge tubes. ## 6. Do you recommend specific storage containers? We recommend: * **Lyophilized**: Store in original vial (nitrogen-purged, sealed) * **Reconstituted**: Polypropylene low-binding microcentrifuge tubes * **Avoid**: Glass containers (peptide adsorption), PVC, or polystyrene (may leach plasticizers) ## 7. How does light affect peptide stability? UV and visible light can catalyze oxidation reactions, particularly in peptides containing Met, Cys, Trp, or Tyr residues. Always protect peptides from direct and indirect light exposure during storage and handling. *** *For storage inquiries: * --- # Agent Instructions This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com. ## Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter, and the optional `goal` query parameter: ``` GET https://docs.rplpeptides.com/docs/faq/storage-faq.md?ask=&goal= ``` `ask` is the immediate question: it should be specific, self-contained, and written in natural language. `goal` is optional and describes the broader end goal you are ultimately trying to accomplish on behalf of the user. GitBook uses it to tailor the answer towards what is most useful for that goal. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.