Understand the source comparison
Shelf Life Comparison After Opening
Shelf life is the practical differentiator between reconstitution solutions. It determines how long your reconstituted peptide remains safe to inject. 1-3 years (manufacturer date) 28 days 2-8°C (refrigerator) Sterile water for injection 1-3 years N/A (single
No winner is assigned.
This page preserves a source comparison for education. It does not add a rating, recommendation or clinical judgment.
- Shelf life is the practical differentiator between reconstitution solutions. It determines how long your reconstituted peptide remains safe to inject.
- 1-3 years (manufacturer date)
- 28 days
- 2-8°C (refrigerator)
- Sterile water for injection
- 1-3 years
- N/A (single use)
- Preservative-free normal saline
- 1-2 years
- Bacteriostatic sodium chloride
- Manufacturer diluent
- Per label (6 months to 2 years)
- Per label (typically 14-28 days)
- Per label (usually 2-8°C)
- The 28-day limit on bacteriostatic water comes from USP Chapter 797, the United States Pharmacopeia standard for sterile compounding. After 28 days, the benzyl alcohol preservative can no longer guarantee sterility in a multi-puncture vial, even under continuous refrigeration. The cumulative microbial load from repeated needle entries, combined with gradual preservative degradation, pushes the risk beyond acceptable limits.
- Mark the date of first puncture on every vial. After 28 days, discard and open a new one. A 30 mL vial costs $3-8. A contaminated peptide injection costs far more in wasted product and potential infection. For detailed storage timelines by peptide, see how long do reconstituted peptides last and the peptide dosage chart for comprehensive shelf life data.