Dear Vivian,

Thank you for your question. Unfortunately, we cannot provide expiration dates on specific oligonucleotides, as this data could differ with each individual sequence. As long as an oligonucleotide is stored at -20°C or lower for long term storage and multiple freeze thaw cycles are avoided, we have seen that dye labeled oligonucleotides can be stable up to 6 months and unmodified oligonucleotides stable up to 1+ years.

Best regards,
Elizabeth