Shelf Life
Shelf Life — The period during which a lyophilized peptide maintains acceptable purity and potency under specified storage conditions.
What Is Shelf Life?
Shelf life is the period during which a peptide product maintains acceptable quality (identity, purity, potency, safety) under specified storage conditions. It is determined by real-time stability studies monitoring degradation rates at the intended storage temperature and confirmed by accelerated studies at elevated temperatures.
Determination
- Real-time: Store at labeled conditions (2-8°C, -20°C, or 25°C) and test at 0, 3, 6, 12, 24 months
- Accelerated: 40°C/75% RH for 6 months predicts 24-month stability at 25°C (Arrhenius extrapolation)
- Forced degradation: Identifies degradation pathways to design stability-indicating methods
- Acceptance criteria: Typically ≥ 90% of label claim potency, ≤ individual and total impurity limits, appearance, pH within range
Frequently Asked Questions
What is Shelf Life?
The period during which a lyophilized peptide maintains acceptable purity and potency under specified storage conditions.
Why is Shelf Life important in peptide research?
Shelf Life is a fundamental concept in quality as it relates to peptide science. It directly influences experimental design, compound characterization, and the reliability of research outcomes across biochemistry and molecular biology disciplines.