Peptide Storage Guide

9 September 2026

Why storage matters

Peptides degrade through hydrolysis, oxidation and microbial contamination, and each is accelerated by poor storage. Keeping a compound intact between delivery and use is the difference between a reliable result and an unexplained one.

Lyophilised (freeze-dried) peptides

The lyophilised powder is the most stable form. Store it according to how long it will be kept:

• Short-term (< 1 month) – Room temperature in a dry, dark location
• Medium-term (1-6 months) – Refrigerate at 2-8°C
• Long-term (> 6 months) – Store at -20°C or below

Keep vials sealed and away from moisture, and let a cold vial reach room temperature before opening it so condensation does not form on the powder.

Reconstituted peptides

Once a peptide has been reconstituted with bacteriostatic water:

• Store at 2-8°C (refrigerator)
• Use within 21-28 days for optimal stability
• Never refreeze reconstituted solutions
• Use sterile technique when withdrawing from vials

Good practice

1. Avoid repeated freeze-thaw cycles – aliquot into single-use portions where practical
2. Protect from light – UV radiation accelerates degradation
3. Use an appropriate solvent – bacteriostatic water (0.9% benzyl alcohol) is the usual choice
4. Label everything – record the reconstitution date, concentration and storage temperature

Quick reference

Draft wording prepared 2026-09-09, awaiting approval by Aevryn Labs Pty Ltd.