I recently came across a vendor who claims to have 6-APB Hcl. Not counting analytical suppliers like Caymanchem, I haven't seen benzofurans Hcl salts in a long time. I have also read somewhere that this particular batch might actually be 5-APB. It has been ages since I last looked into testing benzofurans with test kits. Does anyone know if there are any test kits which could help to distinguish between 6-APB and 5-APB?