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Re:LSD microdosing: a randomized, blind self-experiment by gwern on Thursday October 17, 2013 @05:01PM (#6568090)
> These studies demonstrated no significant loss in LSD concentration at 25°C for up to four weeks. After four weeks of incubation, a 30% loss in LSD concentration at 37°C and up to a 40% at 45°C were observed. Urine fortified with LSD and stored in amber glass or nontransparent polyethylene containers showed no change in concentration under any light conditions.

Sounds about right. So even at room temperature (25°C = 77 Fahrenheit), dissolved LSD is stable over a period of months, and removing light sources improves stability even more. This is pretty poor compared to a great many molecules, but far from fatal to my self-experiment.

Re:LSD microdosing: a randomized, blind self-experiment by tedks on Thursday October 17, 2013 @08:37PM (#6569113)
Were you aware of this beforehand? Did you take precautions to keep the LSD in a cool place away from light?

If it was just in your fridge for five months, I doubt there was much left at the end.

Re:LSD microdosing: a randomized, blind self-experiment by gwern on Thursday October 17, 2013 @11:28PM (#6569609)
I was aware of it beforehand. After I finished photographing the package, I immediately stored it in the refrigerator under an opaque object.