Storage & handling

Lyophilized (powder) storage

Supplied lyophilized and sealed. Keep the unopened vial cold, dry, and protected from light:

• Short term (weeks): 2–8 °C, desiccated.
• Long term (months+): −20 °C; −80 °C for extended archival.
• Allow a sealed vial to reach room temperature before opening to avoid condensation drawing moisture onto the powder.

Reconstituted stock storage

Once dissolved, store the stock cold and use within its stable window. As an illustrative guide for a typical reconstituted peptide stock:

• 2–8 °C: on the order of a few weeks.
• −20 °C: on the order of a few months.

These are general figures only — the authoritative stability for a given lot is on its certificate of analysis. See the stability reference for an illustrative temperature-decay model.

Freeze–thaw

Repeated freeze–thaw cycles degrade peptides in solution. Split the reconstituted stock into single-use aliquots before freezing so each is thawed once. The reconstitution calculator includes an aliquot helper for transferring a target mass into each tube.

Reconstitution (aseptic technique)

• Work on a clean surface; wear gloves. Wipe the vial septum with isopropyl alcohol.
• Choose an appropriate solvent for the compound (commonly bacteriostatic or sterile water; some peptides need a dilute acetic-acid or DMSO carrier). When unsure, consult the product’s data and certificate.
• Add the solvent slowly down the inner wall of the vial — do not aim it directly at the powder.
• Let the powder dissolve gently (swirl or let it stand). Do not shake vigorously; foaming and shear can damage peptides.
• Use the reconstitution calculator to set the stock concentration (mg/mL and molarity).

General handling

• Handle as a laboratory reagent: gloves, clean technique, and the relevant safety data sheet on file.
• Label aliquots with the batch number so they remain traceable to the certificate.
• Dispose of materials per your institution’s laboratory waste protocol.