Source comparison
PT-141 Storage: Temperature vs Time Comparison
Unreconstituted (sealed lyophilised powder) −20°C (freezer) 24–36 months Minimal. Residual moisture <5%, molecular motion suppressed, hydrolysis/oxidation rates negligible Required for long-term storage; gold standard for peptide preservation before use Unreco
This comparison does not assign a generated winner or score.
- Unreconstituted (sealed lyophilised powder)
- −20°C (freezer)
- 24–36 months
- Minimal. Residual moisture <5%, molecular motion suppressed, hydrolysis/oxidation rates negligible
- Required for long-term storage; gold standard for peptide preservation before use
- Unreconstituted (short-term transit)
- 15–25°C (room temp)
- 48–72 hours maximum
- Low. Dehydrated peptide resists degradation, but cumulative exposure accelerates moisture absorption and oxidative damage
- Tolerable during shipping only; transfer to −20°C immediately upon receipt
- Reconstituted (bacteriostatic water)
- 2–8°C (refrigerator)
- 28 days maximum
- Moderate. Hydrolysis, oxidation, and aggregation occur gradually; bacteriostatic agent limits microbial growth
- Standard for active research use; discard after 28 days regardless of appearance
- Reconstituted (temperature excursion)
- >8°C for 4+ hours
- Potency loss begins immediately
- Rapid. Thermal energy accelerates peptide bond hydrolysis and methionine oxidation; aggregation forms inactive peptide clumps
- Unacceptable; assume compromised potency if vial warms above 8°C for extended periods
- Reconstituted (frozen, no cryoprotectant)
- −20°C (standard freezer)
- Not recommended
- Severe. Ice crystal formation physically disrupts peptide structure; no validated stability data exists for frozen reconstituted PT-141
- Avoid entirely unless using cryoprotectant formulations; standard bacteriostatic reconstitution does not tolerate freezing