The Research Peptide Guide
Verify Purity
Demand ≥ 99% HPLC purity and a batch-specific certificate of analysis for every compound.
Confirm Identity
Mass spectrometry should confirm the molecular weight matches the expected compound.
Reconstitute Properly
Use bacteriostatic water, add slowly down the vial wall, and swirl — never shake vigorously.
Store Correctly
Keep lyophilized powder cool and dry; refrigerate reconstituted peptides and use within weeks.
How to evaluate a peptide supplier in Canada
A trustworthy Canadian peptide supplier should meet three core criteria: ≥ 99% HPLC purity verification on every batch, mass-spec-confirmed identity for each compound, and a domestic supply chain to maintain cold-chain integrity. DNA Peptides meets all three standards across our full catalog.
Why purity matters
In research, impurities are confounding variables. A peptide that is only 95% pure introduces 5% of unknown material into your study. That's why we verify ≥ 99% purity by HPLC and publish batch-specific documentation — so your results reflect the compound, not contaminants.
Reconstitution basics
Lyophilized (freeze-dried) peptides arrive as a stable powder. To prepare a working solution, add bacteriostatic water using an insulin syringe, directing the stream against the glass wall rather than onto the powder. Allow the vial to dissolve on its own or with a gentle swirl. Once reconstituted, store refrigerated.
Storage & stability
Unopened lyophilized vials are stable at ambient temperature for transit and can be stored cool and dark long-term. Reconstituted peptides should be refrigerated and used within a few weeks for best integrity.
Put the guide into practice
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