For the majority of compounds, they could be dissolved in DMSO or other organic solvent.
Their stock solution can be stored at -20°C for up to 3 months and aliquoted for sampling convenience.
Several freeze/thaw cycles should not damage the activity of our small molecule products.
However, in many instances the aqueous solutions of some compounds need to be made fresh and cannot be stored. For these compounds, their solution should be prepared just before use and stored no longer than 24 hours.