Freeze-drying
A dehydration process synonymous with lyophilization. The peptide solution is frozen, then pressure is reduced to allow ice to sublimate directly to vapor, producing a stable dry powder.
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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.
Lyophilized powderA freeze-dried peptide in powder form. Lyophilization removes water to create a shelf-stable product that must be reconstituted with bacteriostatic water before injection.
StabilityA peptide’s resistance to chemical degradation over time. Affected by temperature, pH, light, and oxidation. Lyophilized peptides are most stable; reconstituted peptides should be refrigerated and used within 28 days.