Lyophilized powder
Many peptides ship freeze-dried. Water is removed under cold and vacuum, leaving a dry cake that stays stable far longer than a liquid would.
Bacteriostatic water
Sterile water with a small amount of benzyl alcohol, a preservative that slows bacterial growth.
Reconstituted
Reconstituting means dissolving the dry powder back into a liquid. That's all the word means.
The closure
A plastic flip-off cap keeps the stopper clean, an aluminum crimp seal holds the rubber stopper in place, and the stopper is designed to be pierced and reseal.
