I have answered this question many times on this board, since I feel the answer provided me was correct based on expert knowledge.
I actually have a friend who rep'd for a major pharmaceutical company. He told me that absent extreme conditions to include extreme heat and/or humidity (orals), direct sunlight for liquids, AAS/PH will remain effective for many years past expiration.
The two (2) year expiration date assigned to medication in the U.S. was simply adopted for liability and replinishment reasons($$$) and is the same across the board for all meds. The supplemnt industry simply followed along on this one. In the UK for example, it's five years across the board for the same medications.
So, keep it dry and kep it room temp, and dont worry about it.............
As far as the "HAVOC/Epstane" breaking down report; according to posts by Patrick Arnold: without knowing the manufacturing process involved, it's impossible to determine if the process was flawed at some point or a breakdown occured that resulted in the DMT and sulfur content once it was bottled.