Accelerated stability testing at 40°C/75% relative humidity typically runs 8–12 weeks to predict a 24-month shelf life. Real-time testing should run concurrently. Photostability and freeze-thaw cycling add additional weeks. Total cost at a qualified third-party lab generally ranges from $1,500 to $5,000 USD per SKU. Finding a chemist through the AJ Cosmo Labs iOS app who already has lab relationships can streamline scheduling and reduce turnaround time.
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