Froehde reagent - different reaction but same compound?

[closeyoureyes]

Hi.
Quick question, maybe somebody with knowledge in chemistry could explain this:
So lets say I have two types of amphetamine sulfate. Both white in color, both pure and washed with acetone, but they seem to have a tiny difference in effects and when tested with froehde reagent one of them reacts bright red and the other one slowly turns pale orange-ish at most but maybe you could even say it has almost no reaction.
So whats up with that?

 

[Transform]

It sounds like you have different reactions with different compounds. Unless you have tested the amphetamine with another lab technique?

 

[Jabberwocky]

Hi.
Quick question, maybe somebody with knowledge in chemistry could explain this:
So lets say I have two types of amphetamine sulfate. Both white in color, both pure and washed with acetone, but they seem to have a tiny difference in effects and when tested with froehde reagent one of them reacts bright red and the other one slowly turns pale orange-ish at most but maybe you could even say it has almost no reaction.
So whats up with that?

Froehde says "no reaction" but may react red for amphetamine/meth

https://dancesafe.org/wp-content/uploads/2015/12/7-color-chart.pdf

why don't you use a more definitive test like marquis and then mandelin -- red/orange from marquis and then olive from mandelin would be definitive for either meth or amphetamine

could one be methamphetamine and one amphetamine

 

[Jabberwocky]

Hi.
Quick question, maybe somebody with knowledge in chemistry could explain this:
So lets say I have two types of amphetamine sulfate. Both white in color, both pure and washed with acetone, but they seem to have a tiny difference in effects and when tested with froehde reagent one of them reacts bright red and the other one slowly turns pale orange-ish at most but maybe you could even say it has almost no reaction.
So whats up with that?

Try Liebermann -- amphetamine is green and meth is orange