Since just about every oligonucleotide we synthesize here at TriLink is unique, we are unable to provide stability information or run stability studies, as this data could differ with each individual sequence. The most important precaution to take is to properly store your oligonucleotide. As long as your 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.