Kinetic ratio as a parameter for product stability calculations

Area of Science:

• Pharmaceutical Stability
• Chemical Kinetics
• Supply Chain Management

Background:

• Product potency is critical for efficacy and safety.
• Warehouse temperature fluctuations can significantly impact product stability.
• Existing methods for predicting potency loss may not fully capture real-world temperature variations.

Purpose of the Study:

• To introduce and evaluate a new parameter, the kinetic ratio, for estimating product potency during storage.
• To compare the kinetic ratio with virtual temperature methods for accuracy.
• To analyze the influence of seasonal variations and kinetic constants on potency estimation.

Main Methods:

• Integrating actual warehouse temperature data using Arrhenius kinetics.
• Evaluating potency errors arising from integration and temperature averaging methods.
• Comparing kinetic ratios and virtual temperatures under various conditions.
• Developing equations to interrelate kinetic ratio and virtual temperature.

Main Results:

• The kinetic ratio provides a new metric for assessing potency loss under ambient warehouse conditions.
• Seasonal and Arrhenius constant effects on potency were elucidated through kinetic ratio and virtual temperature comparisons.
• Sample calculations with vitamin A data demonstrated the practical application and interpretation of the kinetic ratio.

Conclusions:

• The kinetic ratio offers a valuable tool for more accurate potency estimation in pharmaceutical storage.
• This parameter provides insights into the impact of temperature variability on product stability.
• The proposed method enhances the understanding of degradation kinetics under real-world storage conditions.