Do lyophilized peptides need to be refrigerated during shipping?

Lyophilized (freeze-dried) peptides are generally stable for short periods at room temperature, which is why they are commonly shipped dry. For longer storage, most labs keep them cold, dark and dry.

How should I store reconstituted peptides?

Once a lyophilized peptide is reconstituted, labs typically keep the solution refrigerated and protected from light, and record the preparation date. Check the relevant literature for the specific compound.

How to Store Research Peptides in Canada After Delivery

Receiving and Storing Research Peptides in Canada: A Lab Checklist

First Labs Research Team·October 19, 2026·4 min read

Illustrative insulated parcel with gold-capped research vials on a lab bench

A good result starts when the parcel arrives. This checklist covers what Canadian labs usually check on delivery and how lyophilized research material is commonly stored.

1. Inspect the parcel

Check that vials are intact, caps and seals are undamaged, and the powder sits as a solid cake or loose powder at the bottom of the vial. Photograph anything unusual and contact us with your Order ID.

2. Match labels to records

Note the product, size and any batch information on each label, and compare it with the matching entry on our Lab Reports page. Our batch traceability guide explains how to log this.

3. Store cold, dark and dry

Lyophilized peptides are sensitive to heat, light and moisture. Labs commonly keep sealed vials in a refrigerator or freezer, away from light, and let a vial reach room temperature before opening to limit condensation. See Understanding Lyophilized Peptides for background.

4. Record reconstitution

When a vial is reconstituted for an experiment, label it with the date, solvent and concentration. Our lab reconstitution calculator helps with the concentration math.

Shipping in Canada

Rates, timing and same-day options for parts of Ontario are listed in our Shipping Policy.

Disclaimer: All products are intended strictly for in-vitro laboratory and research use only. Not for human consumption.