Formulation
Lyophilized Powder
Definition
Lyophilized powder is the final product form of a peptide that has undergone lyophilization (freeze-drying). It appears as a white to off-white fluffy or cake-like powder in the bottom of a sealed vial. This form offers maximum stability for storage and shipping, as the removal of water prevents hydrolysis and other degradation reactions. Most research peptides are supplied as lyophilized powder and require reconstitution with bacteriostatic water or another appropriate solvent before use. Properly stored lyophilized peptides can remain stable for months to years at -20°C.