So if I take you right you are saying that a brown 6-APB powder is succinate which is then garbage and should be avoided. Impure means harm as there are too much side-products? As far as I read through several sources of information the succinate form has to be dosed like 30% more but I haven't read about increasing side effects. Thank you, nice insight.
I don't think we have any toxicity data on the positional isomers. I have no specific reason to believe them to be unexpectedly toxic, it's more a case of if QC is so poor, who knows what could be in there?
As I noted, two positional isomers and a ring-chorinated isomer (due to synthetic pathway) were all in there with the 6-APB.
But I can't possibly say what is or is not in a particular batch. The succinate salt is 2:1 i.e. one molecule of succinic acid salts two molecules of 6-APB so if the dose has to be increased by 30%, that's more or less 30% of the product that isn't 6-APB. That 30% could be ANYTHING.
It's simply people willing to play the 'mystery powder game' that is the MOST worrying aspect.
Just as an example, a few years ago there was a cluster of overdoses (5 or 6 fatal) caused by a powder that was being sold as MDMA. The instumental analysis showed that it was in fact a mixture of amphetamine and
para methyl amphetamine.
Now I think most people here WOULD understand why mixing those two is extremely dangerous but most end-users would not. Long experience has demonstrated that at best manufacturers/distributors just don't care about the end-users right down to those who positively enjoy the whole idea of 'playing god' with the lives of end users.
No high is worth dying for. Accept that rip-offs occur and if in doubt, flush it and decline to buy any more.