Source comparison
Storage Requirements: Lyophilized vs Reconstituted CJC-1295
Unreconstituted lyophilized CJC-1295 should be stored at −20°C for long-term stability (6–12 months) or 2–8°C for short-term use (up to 3 months). These temperatures prevent the residual moisture in lyophilized powder from catalyzing oxidative reactions. A via
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- Unreconstituted lyophilized CJC-1295 should be stored at −20°C for long-term stability (6–12 months) or 2–8°C for short-term use (up to 3 months). These temperatures prevent the residual moisture in lyophilized powder from catalyzing oxidative reactions. A vial stored at −20°C that experiences a single 24-hour room-temperature excursion during shipping retains >95% potency if returned to freezer storage immediately. The critical variable is cumulative thermal exposure. One 24-hour excursion is recoverable; three or four excursions over weeks are not.
- Reconstituted CJC-1295 must be stored at 2–8°C and used within 28 days under optimal conditions. Bacteriostatic water (0.9% benzyl alcohol) suppresses bacterial growth but does not prevent peptide degradation or aggregation. Temperature excursions above 8°C accelerate both. At 15°C, reconstituted CJC-1295 degrades at approximately twice the rate observed at 4°C. At 25°C, the rate increases four- to sixfold. If CJC-1295 left out fridge overnight in reconstituted form, assume 20–30% potency loss minimum. And if the excursion lasted beyond 24 hours, the peptide is likely no longer viable for research purposes.
- The bacteriostatic water itself also degrades at elevated temperatures. Benzyl alcohol oxidizes into benzaldehyde and benzoic acid when exposed to heat and light, which lowers the solution's antimicrobial effectiveness. A reconstituted peptide left at room temperature for 48 hours faces both peptide degradation and increased contamination risk, even if the vial was sterile at reconstitution.