p-Benzoquinone CAS# 106514 is used in photography as an oxidizing agent. It's also used in the process to make
holographs. It is also used for the cosmetic industry primarily for it's ability to transform nitrogen-containing cmpd into a variety of colored substances, Benzoquinone is used in the manufacture of unsaturated polyesters as a polymerization inhibitor raw material for hydroquinone. I'm sure you probably really don't want to make your own but
1,4 p-Benzoquinone can be synthedpretty easy. It's an extra
step but it may be a little less risky than buying some although buying isn't really a risk. As far as I know p-benzoquinone is the same as para-Benzoquinone. But p-Benzoquinone is NOT the same. It has a different molleculer weight and CAS# which is 104-91-6, C6H5NO2 as pBenzoquinone is C6H4O2. p-Benzoquinone monoxime explodes when it comes in contact with heat or alkilies or acids. So just a quick guess but I would stay as far away from benzo-monoxime for MDMA synth as possible. Just look for the stuff from Canada or make it yourself buy it in small quantites therefore it would not be suspicious.
Good luck in your endevours.
-peace out
