Accelerated Stability Testing
Stability studies conducted at elevated temperature and humidity to predict long-term stability in a shorter timeframe. If a peptide product remains within specification under accelerated conditions (typically 40°C/75% RH for 6 months), it supports a provisional shelf life claim while long-term data are collected.
Technical Context
Accelerated conditions (40°C/75%RH for 6 months) provide preliminary stability data within approximately 6-9 months (including analysis time), supporting initial shelf-life claims while long-term data are collected. The Arrhenius equation can extrapolate degradation rates from accelerated to storage conditions for simple degradation pathways: ln(k) = ln(A) - Ea/RT (where k is rate constant, Ea is activation energy, R is gas constant, T is temperature). However, Arrhenius extrapolation has limitations for peptides: multiple degradation pathways with different activation energies may operate, phase transitions (lyophilised peptides may undergo glass transition at elevated temperatures, changing degradation kinetics), and aggregation pathways may not follow simple Arrhenius kinetics. ICH Q1E provides guidance on extrapolation of stability data for shelf-life estimation.