Researchers new to peptide handling often assume every shipment needs dry ice. In practice, lyophilized powder is remarkably stable: with the water removed there is little for hydrolytic degradation to act on, and short transit at ambient temperature has negligible measurable impact.
Long-term storage is a different question. Sealed lyophilized vials belong at -20°C, where they remain stable for the duration of the labeled shelf life. A standard laboratory freezer is sufficient; ultra-low storage is not required.
Once reconstituted, the clock starts. Solutions should sit at 2-8°C, shielded from light, and be used within the product-specific window. Oxidation at methionine and tryptophan residues, deamidation at asparagine, and adsorption to container walls all accelerate at room temperature.
Atlas ships insulated packaging for temperature-sensitive solutions and dispatches same day on orders placed before 2:00pm ET. If a package arrives damaged or visibly compromised, photograph it before opening and contact us — we replace those shipments at no cost.
Check a lot certificate
Every Atlas vial resolves to the independent report for its production run.
COA lookupKeep reading
How to Read a Certificate of Analysis
HPLC purity, mass-spec identity, water content and residual solvents — what each section of a COA actually tells you.
Reconstitution Basics for the Lab
Diluent selection, concentration math and the handling mistakes that quietly ruin an otherwise good vial.
Third-Party Testing: What We Actually Do
The three-stage release process behind every Atlas lot, and why we publish the raw chromatogram.