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Air Injection Contamination Injecting air into vial before drawing solution Backflow contamination on every subsequent draw Never pre-inject air; use slow lateral injection technique Increased turbidity over 48–72 hours; inconsis…
Vial Temperature Bring lyophilised vial to 20–22°C for 10 minutes before reconstitution Add bacteriostatic water to frozen vial immediately after removing from freezer Thermal shock fractures peptide secondary structure, reducing…
Lyophilised powder at −20°C (unopened) 12–24 months Minimal—lyophilisation removes water, preventing hydrolysis and oxidation Gold standard for long-term peptide storage; always verify vacuum seal integrity Reconstituted with bac…