Well the white stuff I was given a bit of wasn't peevee as I dropped a little bit into a hot solution of potassium permanganate and there was no safrole like smell (any simple compound with a 3,4-methylenedioxybenzyl group in it is oxidized to piperonal - 3,4-methylenedioxybenzaldehyde - which has a distinct, recxognizable smell even at tiny air concentrations) - methylone, peevee, MDMA etc all produce the smell if added to hot permanganate soln, but the white stuff didn't ergo it's not peevee. As to it's full identity though, best to find someone with access to a GCMS or similar