The best way is to store them in lyophilized form.
Lyophilized peptides (both regular peptides and KLH conjugated peptides) are more stable for long-term storage. The customer can store them in -20C for up to a year.
We do not recommend long-term storage in solution.
If you would like to store the dissolved peptides, please store them in -20C to -80C and avoid freeze-thaw cycles.