Lyophilized powder
A freeze-dried peptide in powder form. Lyophilization removes water to create a shelf-stable product that must be reconstituted with bacteriostatic water before injection.
Frequently Asked Questions
What is Lyophilized powder?
Why is Lyophilized powder important in peptide research?
Related Terms
The freeze-drying process that removes water from a peptide solution by sublimation under vacuum. Creates a stable, shelf-stable powder with a characteristic "puck" or "cake" appearance in the vial.
ReconstitutionThe process of dissolving a lyophilized (freeze-dried) peptide powder with bacteriostatic water or sterile water before injection. Proper reconstitution technique is critical — the diluent should be added slowly along the vial wall to avoid damaging the peptide.
Bacteriostatic waterSterile water containing 0.9% benzyl alcohol as a preservative. Preferred for reconstituting peptides because the preservative inhibits bacterial growth, allowing multiple draws from the same vial over 28 days.
Peptide storageThe conditions required to maintain peptide stability and potency. Lyophilized peptides should be stored at -20°C for long-term or 2–8°C for short-term. Reconstituted peptides must be refrigerated and used within 28 days.