Critical Temperature Thresholds in Lyophilization

Lyophilization, or freeze-drying, is the gold standard for peptide preservation. However, the process itself is highly sensitive to temperature fluctuations. The "Glass Transition Temperature" (Tg) of the frozen matrix is the most critical parameter in this process.

Tg and Cake Integrity

If the product temperature exceeds the Tg during primary drying, the frozen matrix will collapse. This result, known as "melt-back," leads to a non-porous, high-moisture cake that significantly reduces the shelf-life and solubility of the peptide.

Post-Process Storage

Even after successful lyophilization, the residual moisture content must be kept below 3% to prevent long-term degradation. This is why PeptideLab utilizes advanced moisture-sensing technology during the final stages of the freeze-drying cycle.