I bought a Formulary Developer 12 (Edwal 12) kit about a month ago. Everything looked fine in the box but yesterday I took another look in the box and all the paper labels on the bags, as well as the mixing instruction sheet looked like they had a purple stain. I took a look at the PPD bag and all the crystals have gone purple. I'm guessing the PPD is dead? Strange that other things in the box have also turned purple though. Leaky PPD bag? Not good since that stuff's pretty poisonous.