A stock solution of Benzo[a]pyrene in DMSO can typically be stored for several months to a year when kept in amber glass vials or aluminum foil-wrapped containers, protected from light, and stored at -20°C or below. However, periodic checks for degradation or precipitation are recommended, and it's important to follow the specific guidelines provided by the manufacturer for optimal storage conditions and shelf life.

Benzo[a]pyrene stock solutions in DMSO can typically be stored for several months to a year if stored properly at -20°C or below, protected from light. It is advisable to periodically check the stability and concentration of the stock solution during storage. Aliquoting the stock solution into smaller volumes and following safety precautions is recommended.

good luck

Djihad Chenna,

Do you if the stock solution colour changed from transparent yellow to turbid yellow, what does that indicate? This happens after thawing twice only!