Long term: -80 degree C Stable for at least 1 year after receipt when stored, as supplied, at -80 degree C. Protect from exposure to air. Open ampule and aliquot into suitable tubes or vials. Store at -80 degree C or colder. For experiments with cells or tissues, aliquots of stock solutions may be evaporated to near dryness under a stream of nitrogen and dissolved in ethanol. Stock solutions may be used directly for HPLC analysis.
