# Reagent Expiration Date Definition The control software for all instruments will allow the reagents to be used **the day of expiration** thus they are still within their expiration until the end of that day. For example: If the expiration date states 25-Oct-2022, the reagents are within Illumina's consumable warranty if used on 25-Oct-2022 and can be used until 26-Oct-2022. \ \ \
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