Peptide Storage: Complete Guide for Research Laboratories | QSC Peptides
QSC RESEARCH GUIDE
Peptide Storage: Complete Guide for Research Laboratories
Improper storage is the primary cause of peptide degradation in research settings. Peptide stability depends on temperature, moisture, light, oxygen, and pH — all of which can be controlled with correct storage practice. This guide covers storage conditions for lyophilised and reconstituted peptides, common degradation mechanisms, and practical laboratory storage protocols.
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Storage Conditions by Phase
Phase
Recommended condition
Duration
Notes
Lyophilised — long term
−20°C, desiccated, dark
12–24 months
Desiccant in storage container; avoid frost-free freezers
Amber vials; dark storage; never leave vials in light
Microbial contamination
Bacteria/fungi in reconstituted solution without preservative
Bacteriostatic water; aseptic technique; discard opened sterile water after 24hr
Peptide-Specific Storage Notes
Compound
Special consideration
BPC-157
Very stable — room temp lyophilised acceptable for months; refrigerated reconstituted 4-6 weeks
TB-500
Sensitive to agitation — swirl gently; avoid shaking reconstituted
SS-31 (Elamipretide)
Sensitive to oxidation — store under inert atmosphere; use within 2 weeks of reconstitution
MOTS-c
Stable lyophilised; reconstituted refrigerator 4 weeks; aliquot for longer term
Semaglutide/tirzepatide
Require 0.1% acetic acid for reconstitution; stable 8 weeks refrigerated once reconstituted
GHK-Cu
Blue coloration is normal (copper complex); refrigerated reconstituted 6-8 weeks
NAD+
Sensitive to oxidation — use within 24-48hr of reconstitution; fresh for each session
Epitalon
Very stable — standard BW reconstitution; refrigerated 4-6 weeks
Shipping and Receiving Peptides
QSC ships lyophilised peptides using:
Shipping parameter
QSC practice
Primary container
Sealed glass vial with rubber septum and aluminium crimp cap
Secondary container
Padded vial holder with desiccant sachet
Temperature
Lyophilised peptides shipped ambient — no cold chain required
Tracking
All orders tracked; EU/UK/Canada/Australia — domestic warehouses
Receipt action
Inspect for broken septa, unusual colour, wetness. Proceed immediately to −20°C storage
Do peptides need cold chain shipping?
Lyophilised peptides are stable at ambient temperature for weeks to months — cold chain shipping is not required. Reconstituted peptides should not be shipped. QSC ships all compounds lyophilised from domestic warehouses. If you receive a vial that appears wet or shows signs of moisture, contact QSC before use.
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Frequently Asked Questions
How long do peptides last in the freezer?
Lyophilised peptides stored at −20°C in a desiccated, dark environment last 12–24 months in most cases. Some peptides (epitalon, BPC-157) are reported stable for 36+ months. Reconstituted peptides stored at −20°C last 6–12 months if properly aliquoted.
Can I keep peptides at room temperature?
Lyophilised peptides are stable at room temperature for weeks to months (compound-dependent) if kept dry and dark. For research quality preservation, refrigerator (2–8°C) is preferred for working stocks and −20°C for long-term storage. Reconstituted peptides must be refrigerated or frozen.
How many freeze-thaw cycles can reconstituted peptides survive?
The general guideline is a maximum of 3-5 freeze-thaw cycles before significant degradation risk. Best practice: aliquot reconstituted peptide into single-session volumes immediately after reconstitution, then freeze. Thaw only what is needed per session.
Why use bacteriostatic water and not regular water for storage?
Bacteriostatic water contains 0.9% benzyl alcohol, which inhibits bacterial growth. Without a preservative, reconstituted peptide solutions support microbial growth within 24–48 hours at refrigerator temperatures. BW extends the safe storage period to 4–8 weeks for multi-use vials.
